492 results about "Red soil" patented technology

The invention provides a phosphorus dissolvable penicillium oxalicum P8, which has the function of dissolving various kinds of indissolvable phosphorus in soil, is suitable for red soil in the South,black soil, drab soil and moisture soil in the North and other types of soil, and has various functions of improving the crop yield, activating the indissolvable phosphorus in the soil, preventing thesoil chemical fixation of phosphorus fertilizers and improving the utilization efficiency of the phosphorus fertilizers.

The invention discloses a method for separating nickel, magnesium and cobalt from red soil nickel ore leaching liquid based on a solvent extraction technology. The method is characterized by comprising the following steps of: adjusting the pH value of the leaching liquid to be between 3.5 and 5.5; extracting impurities by using diisooctyl acid phosphate, and adding into an organic phase; extracting the cobalt and the magnesium by using 2-ethylhexyl phosphonic acid single 2-ethylhexyl ester; making the nickel left in a water phase to separate the nickel from the cobalt and the magnesium; performing multi-stage reverser flow magnesium washing on the organic phase from which the cobalt and the magnesium are extracted by using sulfuric acid solution at slightly low concentration; adding the magnesium into the water phase, and making the cobalt left in the organic phase to separate the cobalt from the magnesium; and reversely extracting the cobalt by using sulfuric acid solution at slightly high concentration to obtain cobalt sulfate solution with high purity. In the method provided by the invention, a process is simple, a relatively expensive reagent is not required to be consumed, the nickel, the magnesium and the cobalt can be effectively separated from the red soil nickel ore leaching liquid, nickel sulfate solution and the cobalt sulfate solution which have high purity are produced, the nickel and the cobalt have high recovery rates and the magnesium can be recycled.

The invention relates to a process for cutting thick branches of golden camellia. The process comprises the steps of (1) applying fertilizer to a seed golden camellia; (2) conducting gibberellin treatment on the seed tree, wherein gibberellin is sprayed on leaf surfaces of the seed tree; (3) conducting lateral branch girdling treatment, wherein a lateral branch is selected for girdling, an ABT rooting powder solution is daubed on a girdling opening, and the girdling opening is wrapped in a plastic cloth; (4) conducting cuttage branch shearing and pretreatment, wherein the cutting branch is cut, soaks in the ABT rooting powder solution for 5-15h and then is sterilized; (5) conducting seed bed building and cuttage, wherein peat soil is laid firstly for bottoming, then acid red soil is laid, finally, granular perlite particles are laid, and cuttage is conducted as per the conventional method; and (6) conducting cuttage nursery garden management. The process for cutting thick branches of golden camellia has the advantages that the cuttage branch rooting time can be brought forward, the cutting seedling survival rate can exceed 95%, the transplanting rate can exceed 90%, the operation is simple, the large-scale intensive breeding production of golden camellia seedlings can be facilitated, and the breeding speed of the golden camellia can be accelerated.

The invention relates to a green body of red soil ceramic. The green body of the red soil ceramic is prepared from the following raw materials: red soil, quartz, talc, limestone and dolomite; the transmutation glaze of the red soil ceramic is prepared from the following raw materials: potassium feldspar, albite, calcium oxide, barium oxide, kaolin, quartz powder, sodium tripolyphosphate, titaniumoxide, rutile, zinc oxide and a coloring agent. By addition of other mineral raw materials, chemical raw materials and the like, the physical performance and the chemical performance of the green body are changed and the technical problems that the green body glaze of the red soil product is difficult to combine and the product is loose and fragile are solved; the firing temperature of the glaze is reduced from 1,310 DEG C to 1,230 DEG C, so thatthe firing temperature is reduced by 80 DEG C, the using amount of the fuel and the discharge quantity of harmful gas are reduced, environmental protection is contributed and production cost is greatly saved; and by development of the lead-free transmutation glaze, the lead-free transmutation glaze is suitable for being combined with the green body of the red soil ceramic, so that the problem of pollution to the ceramic decorative environment is solved fundamentally.

The invention relates to a method for governing a red soil strongly-eroded slope. The method comprises the following steps that (1) horizontal furrow groups are dug in a red soil strongly-eroded slope surface along all contour lines, each horizontal furrow group comprises multiple horizontal furrows, and the cross section of each horizontal furrow is trapezoid; (2) planting holes are dug between two adjacent horizontal furrows in the same horizontal furrow group, and the cross section of each planting hole is trapezoid; (3) shrubs and grass are planted in the horizontal furrows, and grass is planted in the planting holes; (4) shallow furrows are dug in the same horizontal furrow group, and water and soil conservation grass seeds are evenly sowed in the shallow furrows to form horizontal grass band chains; (5) after the environment of the strongly-eroded slope is improved one year later, trees are then planted in the horizontal furrows and the planting holes. The method is applied to water and soil loss governance and governance of ecological environment of vegetation recovery of the red soil strongly-eroded slope, water storage and soil protection performance of the slope is increased, the ecological environment good for the vegetation recovery is created, and the governance effect of a red soil strongly-eroded area is improved.

The invention discloses a GAP (good agricultural practices) cultivation technique for a leaf-harvesting ginkgo garden with red soil. By the GAP cultivation technique, the yield and quality of ginkgo can be effectively improved and the standardization and industrialization of leaf-harvesting ginkgo planting in red soil in south of China are promoted. The GAP cultivation technique comprises building and management technique of the leaf-harvesting ginkgo garden, methods of seed selection, seed planting stage, planting density and fertilization of the leaf-harvesting ginkgo, field management, disease and pest prevention and control method, ginkgo leaf harvesting stage and harvesting method, and methods for medicinal material field processing and storage. By adopting the technical scheme disclosed by the invention, high-quality raw medicinal material is provided for traditional Chinese medicine extract and Chinese patent drug pharmaceutical enterprises; and the GAP cultivation technique has very important effect of guaranteeing the safety, high efficiency, stability and controllable quality of the traditional Chinese medicine extracts and Chinese patent drugs.

The invention discloses a red earth rice field reduced fertilizer application method based on a target yield. The method includes the steps that (1) 95-105 percent of annual output of double cropping rice in recent five years serves as the target yield; (2) according to recommendation of an area research result, 90-100 percent of fertilizing amount serves as area average proper fertilizing amount; (3) organic fertilizer is applied, wherein farmland organic matter resources obtained by that straw is abandoned in fields and milk vetch is plowed and returned to the fields serve as organic fertilizer to replace chemical fertilizer, replaceable amount of nutrients of the organic resources is calculated according to the nutrient amount of N, P and K respectively being 0.826%, 0.119% and 1.708% in dry matter of the straw and the nutrient amount of N, P and K respectively being 3.085%, 0.301%, 2.065% in dry matter of the milk vetch, corresponding chemical nutrients are all replaced by P and K in the straw and the milk vetch after the straw and the milk vetch are returned to the fields, half amount of N contained in organic matter is used for replacing the amount of the corresponding chemical nutrient, and the reduced application amount of the chemical fertilizer is obtained; (4) the chemical fertilizer is applied, wherein the area average proper fertilizing amount minus chemical nutrient replacement amount is equal to applying quantity of the chemical fertilizer in the reduced fertilizer application method. Increased extra labor force for farmland organic waste utilization is quite little, and the method is easy and convenient to operate and easy to popularize.

The invention provides a full-exposure cuttage and propagation method of camellia reticulata. Lignified twigs with the length of 5-8cm of the current year serve as cutting wood, and are inserted in a seed bed filled with raw red soil and provided with a moisture preserving and temperature controlling device after the treatment of naphthylacetic acid or heteroauxin hormones. In the invention, the survival rate of cuttage of the camellia reticulata can be greatly improved, and the method has a better effect for some breeds (such as which are difficult to survive through cuttage (Hen tiangao, the most precious breed of camellia reticulate, and the like).

The invention discloses a biochar seedling-growing substrate and a production process thereof and belongs to the technical field of modern agriculture and forestry production. The embodiment scheme comprises the following steps: (1) preparing biochar; (2) preparing an organic fertilizer; (3) preparing vermiculite; (4) preparing yellow-red soil; (5) mixing materials; (6) packaging and manufacturing a product. According to the invention, the problems that the conventional seedling-growing substrate is high in disease rate, high in energy consumption, low in soil improving property, low in stability and low in ion exchange capacity and the like are solved.

The invention discloses Jianshui (Country of Yunnan) purple pottery wood-fired pug and a product firing method thereof. The wood-fired pug is red mud pug prepared by adding water into 8 to 12 percent of argil, 28 to 32 percent of blue earth, 18 to 22 percent of loess and 38 to 42 percent of red soil. The product firing method comprises the following steps: manufacturing a purple pottery product blank from the red mud pug, then putting the blank into a smokeless wood-fired kiln, and firing pines by adopting a wood firing method, or firing the blank together with a Jianshui purple pottery argil blank, ending firing till the temperature is 1,190 to 1,210 DEG C, and cooling in the kiln to obtain a product. The firing temperature of the conventional red mud is changed via preparation of a new red mud formula, so that the difficulty in firing of Jianshui purple pottery is solved, a Jianshui purple pottery wood-fired product with rich kiln changes is obtained, and the production efficiency is improved.

The invention discloses a method for intercropping peanuts and cassava in hilly red soil dry land. The planting mode is characterized in that the safe spatial distance between the cassava and the peanut is at least 40cm; the safe spatial distance between peanuts is at least 40cm; the safe spatial distance between the cassava is at least 400cm; the ratio of the peanut to the cassava is (8.5-9.5):1; soil preparation is performed from December to the January of the next year; the soil is ploughed to great depth for winter; the peanut and the cassava are sowed at the same time; the adaptive phaseis 8-16th, August; and the peanut is subjected to hole sowing; and the cassava is sowed in a manner of inclining 43-47 degrees relative to the ground. The production and income increasing effects areobvious; the yields of intercropped peanuts and pure peanuts have no obvious difference; the yield of the cassava is 1 ton per unit area; the production value is increased by 20.3%; the coordinative development of an energy crop and an oil crop is realized; the light energy utilization of the hilly red soil dry land is obviously improved; and the auxiliary energy conversion efficiency can be improved by 69.42% compared with that of the pure peanut culturing. The method provided by the invention is suitable for the hilly red soil dry land in tropical and subtropical regions.

A method for removing the copper pollution in laterite includes such steps as arranging the electrolytic pools at both ends of the polluted laterite region, arranging a processing pool close to each electrolytic pool in order to exchange liquid, inserting electrodes in said electrolytic pools, applying a DC power supply across them, and using an automatic pH control system to control the pH value of cathode pool to be in a certain range.

The invention discloses a red paddy soil fertility evaluation method with relative yield considered. The method comprises the following steps: (1) main indicators for paddy soil fertility quality evaluation are defined and classified, and 13 evaluation indicators are divided to five classes; (2) a calculation method is defined: a, membership is calculated, b, the weight coefficient of each singlefertility quality indicator is calculated, and c, a comprehensive fertility indicator is calculated; and (3) result accuracy is defined. According to the evaluation method with relative yield considered provided in the invention, the contradiction between a soil fertility level and rice yield performance when the traditional FUZZY method is used to evaluate the soil fertility can be solved, for example, a high soil fertility indicator is acquired by FUZZY, however, due to unreasonable management, the rice yield is low, or, a low soil fertility indicator is acquired by FUZZY, however, due to anenhanced management level, the rice yield is high. Compared with the FUZZY method, the method with the yield considered is more credible, accurate and subjective, and the application prospect is wide.

The invention provides a soil conditioner suitable for southern red soil and a preparation method, and belongs to the technical field of soil conditioner preparation and utilization. The soil conditioner is composed of, by mass, 12.5-25% of bio-active humic acid, 5-11.5% of chicken manure, 4-12% of tobacco waste, 2.5-7.5% of corn straw, 3-9% of rice straw, 5-11.5% of grass coals, 5-12.5% of sucrose filter mud, 1-6% of calcium superphosphate, 1-4.5% of urea, 2-6% of potassium sulphate, 9-17.5% of calcium magnesium phosphate, 0.5-2.5% of manganese sulfate, 0.5-2.5% of ferrous sulfate, 0.5-3% of zinc sulfate, 0.5-2.5% of ammonium molybdate, 2.5-7.5% of boric acid, 0.5-4% of BFA microbial agents and 1.5-4% of bentonite, and the sum of all the components is 100%. The soil conditioner takes the organic nutrient humic acid as the main component and contains a large quantity of readily oxidized organic matter, active groups and exchangeable magnesium, therefore, the physical and chemical properties of the acid soil can be obviously improved, comprehensive and reasonable nutrients are supplied to crops, the crop growth is promoted, the crop quality and yield are improved, the arable soil quality can be comprehensively improved, and the conservation soil fertility is improved.

The invention discloses a cultivation method capable of improving the quality of long-section bamboo shoots. The cultivation method mainly comprises the steps of bamboo forest selection, stand structure regulation, earth covering, forest land reclamation, fertilization, bamboo shoot harvesting and ecological pest control and prevention. In the step of earth covering, a long-section bamboo forest land is uniformly coated by yellow earth or red earth which is not cultivated from September to February in the next year, and stones and stalks in the yellow earth or the red earth which is not cultivated are removed, wherein the content of soil clay is 50-70 percent, the volume weight of the soil clay is about 1.2, the pH value is 4.5-5.5, and the earth covering thickness is 25-35cm. According to the technology, the high-quality bamboo shoot operation of long-section bamboos for 3-5 years can be maintained by virtue of one-time earth coating, the bamboo shoot formation period can be prolonged for about 15 days, the quality of the bamboo shoots is improved, and the economic value is increased.

The invention belongs to the field of agriculture and environment, and relates to a modeling method for a prediction model of the cadmium content in vegetables and application thereof. The modeling method comprises the following steps that a soil sample is collected, the iron-extractable (FeDCB-soil) content of sodium hydrosulfite-trisodium citrate-sodium bicarbonate (DCB) in soil, the cadmium-extractable (Cdoxalate-soil) content of oxalic acid / ammonium oxalate (Oxalate) and the aluminum-extractable (AlNaoac-soil) content of acetic acid / sodium acetate (NaOAc) in the soil are measured, and a model relationship among the content of FeDCB-soil, Cdoxalate-soil and AlNaoac-soil and the content of vegetable cadmium (Cdplant) is established. The formula of the established model is shown in the formula. The model is suitable for the prediction of the cadmium content of the vegetables in the soil, can improve the prediction accuracy of the cadmium content of the vegetables, and provide reference for vegetable safety production layout.

The invention relates to a method for raising seedlings of Pinus kesiya var.langbianensis by efficient twig cuttage propagation, particularly relates to a method for obtaining Pinus kesiya var.langbianensis by low-cost and efficient cuttage, which directly adopts mountain red soil (raw soil) as matrix and belongs to the technical field of cuttage seedling raising. Since mountain red soil (raw soil) has certain permeability, good water retaining capacity and less harmful bacteria, the method directly adopts mountain red soil as matrix for raising seedlings of Pinus kesiya var.langbianensis by twig cuttage, so as to increase the rooting rate and survival rate of the seedlings of Pinus kesiya var.langbianensis obtained by twig cuttage. The invention relates to a low-cost asexual propagation technology for Pinus kesiya var.langbianensis by twig cuttage. By use of the method provided by the method, the propagation coefficient is high, the seedling raising is not affected by seed size, the raised seedlings have relatively stable traits, the individual plant in a cutting orchard can provide 50-70 coppice shoots, and the ear length is 10 cm. The method has wide prospect of industrialization. The capacity of supplying Pinus kesiya var.langbianensis seedlings is greatly improved by virtue of the generalization and application of the method, and great economic, social and ecological benefits are generated.

The invention relates to an imitation wood-grain ceramic product and a production process thereof; the imitation wood-grain ceramic product comprises a ceramic body and also comprises a cracked ground glaze layer and a surface glaze layer arranged on the surface of the ceramic body. The imitation wood-grain ceramic product provided herein is totally different from traditional ceramic with smooth glaze, and has unique artistic effect. The cracked ground glaze layer and the surface glaze layer form the natural ceramic body cracked and exposed; as the cracked ground glaze layer is thick, the cracked ground glaze layer is stereoscopic; as the color of the whole ceramic product is adjusted through the surface glaze layer, imitation bark or other rough grains can be achieved. High contents of red soil, clay, gold tailings and other low-price industrial wastes are used as ceramic materials for the imitation wood-grain ceramic product, so that the imitation wood-grain ceramic product has significant environmental value, and has effectively decreased production cost of materials and increased economic benefit and marketing competitiveness.

The invention discloses a red-soil-region peanut continuous-cropping obstacle reducing special fertilizer, a preparation method and a usage method. The special fertilizer is composed of, in percent by weight, 10-30% of decomposed dry bird excrement, 10-30% of humic acid, 10-20% of urea, 20-40% of calcium-magnesium-phosphorus fertilizer, 10-15% of potassium chloride, 0.5-2% of borax, 0.5-2% of zinc sulfate, 0.01-0.05% of ammonium molybdate, 0.005-0.02% of compound sodium nitrophenolate, 0.001-0.01% of sodium alpha-naphthyl acetate, 0.01-0.05% of hymexazol, and 0.01-0.05% of diazinon. The special fertilizer is applied red-soil-region field on which peanut is continuously cropped for three or more years with the usage amount of 2000-2500 Kg / hm<2>, the usage method comprises that the fertilizer is completely basally applied for one time, or the fertilizer is applied for two times according to the base-fertilizer topdressing-fertilizer weight ratio of 2:1, the base fertilizer is applied in furrows before peanut is sowed or is spread over the whole field when ploughing is performed, topdressing is combined with intertillage weeding, and fertilization and earthing up are performed. The special fertilizer is verified to be capable of increasing peanut output by 15-25% compared with a conventional fertilizer by applying the special fertilizer to a large field on which peanut is continuously cropped for 10 years or more at 2012 and 2013, and the application method is simple, reasonable, and high in operability, and exhibits technical progress.

The invention discloses a measurement system and method for the stress of the surrounding rock of a hipparion red soil tunnel under the influence of crack water. The measurement system for the stress of the surrounding rock of the hipparion red soil tunnel under the influence of the crack water comprises a signal amplifier, a data collector, an upper computer, a power supply and eight sensor groups; the sensor groups are connected with the data collector by the signal amplifier, and the data collector is connected with the upper computer; the eight sensor groups are respectively installed at the arch crown of the monitoring section of a hipparion red soil tunnel, both sides of the arch waist of the monitoring section of the hipparion red soil tunnel, both sides of the side wall of the monitoring section of the hipparion red soil tunnel, both sides of the arch foot of the monitoring section of the hipparion red soil tunnel and the position of the inverted arch of the monitoring section of the hipparion red soil tunnel; and the data of soil pressure and water pressure are collected in real time by the sensor groups, the collected data are transmitted to the data collector by the signal amplifier, the data are collected by the data collector according to a certain frequency and are also transmitted to the upper computer, and the received data are processed by the upper computer. According to the measurement system and the method for the stress of the surrounding rock of the hipparion red soil tunnel under the influence of the crack water, the influence degree of the pressure of pore water to the total stress of the surrounding rock in the construction process of the hipparion red soil tunnel can be quickly, continuously and accurately measured, the problem existing in the construction process is fed back in time, and a construction design scheme is regulated in real time.

The invention relates to a combined town sewage treatment constructed wetland system and a town sewage treatment method. The system comprises a biological regulation pool unit, an aerobic degradation and microbe culture pool, a subsurface wetland and a surface flow wetland in sequential connection, wherein the biological regulation pool unit comprises a pretreatment pool A1, a pretreatment pool A2 and a mixed regulation pool, the pretreatment pool A1 and the pretreatment pool A2 are parallel, the mixed regulation pool is serially connected behind the pretreatment pool A1 and the pretreatment pool A2, floating type aquatic plants are put and cultivated in the biological regulation pool unit, a vermiculite mineral layer is paved at the bottom of the aerobic degradation and microbe culture pool, and substrates in the subsurface wetland respectively comprise a gravel layer, a fine sand layer, a gravel and fine sand mixed layer and a fine sand and red soil mixing layer form bottom to top. The system has the advantages that the advantage complementation of the treatment effect among all units can be realized, and the advantage complementation of the treatment effects in all seasons can also be realized, so TN, TP and CODcr can respectively reach better removal effect, finally, the wetland area is greatly reduced, and the goal of enhancing the decontamination effect is reached under the condition of saving the building cost and the maintenance cost.

The invention provides a special foliage fertilizer containing a biomass extraction liquid for navel orange, which is composed of the following components in parts by weight: 50-300 parts of magnesium nitrate, 60-200 parts of boric acid, 30-150 parts of zinc sulfate, 50-300 parts of manganese sulfate, 1-6 parts of sodium dodecylbenzene sulfonate, 500-1500 parts of the biomass extraction liquid and 500-4500 parts of purified water. Compared with conventional foliage fertilizers, because of the addition of the biomass extraction liquid, the foliage fertilizer can promote plants to absorb nutrients, improve fertilizer effect, improve photosynthesis capability of plant leaves, improve the quality of navel orange, meet the nutrient absorption law of Gannan navel orange, and simultaneously reduce the unfavorable influence on navel orange garden soil and fruit quality caused by improper use of a nitrogen fertilizer and a phosphatic fertilizer, has strong pertinence and high utilization rate, is free of N, P, K and the like macroelements, and is applicable to navel orange growing district with acidic soil such as Gannan of Jiangxi in China.

The invention relates to a loquat tree organic cultivation method. The invention relates to the technical field of agriculture, forestry, husbandry, hunting, trapping and fishing, and especially relates to a loquat tree cultivation method. The invention provides a large-volume, high-yield and high-disease-resistance loquat tree organic cultivation method. The method comprises the following steps: (1) girdling, branch stretching and injured branch bending are carried out, such that flower bud differentiation is promoted and controlled; wherein a main trunk is girdled by 2-3 strips, and the wound is smeared with a 1:50 solution of 50% thiophanate wettable powder for preventing germ infection; (2) reasonable close planting is carried out, wherein a red soil, loess or loam land with deep soil, good drainage and rich humus is selected for planting; (3) a base fertilizer is heavily applied, wherein 0.5-0.75kg of lime, and 1-1.5kg of a calcium, magnesium and phosphorous fertilizer are filled in each pit; (4) flower bud differentiation is promoted and controlled through fertilizer and water management; through June to August, no nitrogen fertilizer is applied, and phosphorous and potassium fertilizes are approximately added; and (5) trimming and pruning are carried out, wherein after field planting of the loquat trees, topping is carried out on a main trunk at a place 50cm from the ground for determining the height of trunk.

The invention discloses a seedling growing method for tea trees.The method comprises the steps of shearing spikes, preparing a water culture container, performing water culture on cut spikes, preparing a red soil solution, transplanting to a nutrition pot, hardening seedlings and the like.First, a field planting tray is used for dividing the water culture container into an upper cavity and a lower cavity, and cut spike branches are made to penetrate through the field planting tray, fixed and then subjected to water culture.In the water culture process, temperature and humidity are controlled at different segments, the temperature of the upper cavity is kept at 10-12 DEG C, the humidity is controlled at 70-80%, and the water temperature of the lower cavity is kept at 30-32 DEG C; low temperature and high humidity are utilized for lowering metabolism of buds and leaves of the cut spikes, so that moisture and nutritional substances in cut branches are better locked, and meanwhile high-temperature water culture is utilized for promoting rooting at the bases of the cut branches.The cut spikes subjected to water culture are transplanted to the nutrition pot for hardening seedlings 20 days after releasing air and growing roots.Through the method, the requirement on the cut branches is lowered, a part of non-semi-lignified scions in the branches are utilized, and the survival rate of tea seedlings is increased.Meanwhile, the method has the advantages that operation is easy, the rooting speed is high, the seedling growing cost is lowered, and maintenance is more convenient.

The invention belongs to the field of agricultural production, and particularly discloses a charcoal-based fertilizer with nutritional and improvement functions. The charcoal-based fertilizer comprises a biochar mixture, an organic fertilizer fermentation mixture, an additional mixture and auxiliary materials, wherein the biochar mixture comprises plant straw, seed shells, sawdust, sludge biochar and lignite biochar; the organic fertilizer fermentation mixture comprises bone meal, biogas residues, an excrement mixture, mushroom sticks, oil cakes and fermentation strains; the additional mixture comprises furrow soil, a microbial functional agent, humus soil, red soil, polymethyl methacrylate and cadmium chloride; and the auxiliary materials comprise bentonite, glycerol, cane sugar, rosin and an additive. According to the invention, waste materials are fully utilized, functional bacteria and organic matters in the organic fertilizer can be fully released, soil can be improved, release of nutrients fixed by the soil can be promoted, a nutrient content is high, soil organic matters and beneficial microbial florae can be increased, and basic nutrients needed by crop growth can be provided.

The invention relates to a low-cost method for disposing red soil nickel ore, comprising the following steps: leaching the red soil nickel ore from a normal pressure pickling tank; carrying out magnetic separation on the filter residue obtained from the filtered red soil nickel ore, wherein the filtered red soil nickel are divided into a magnetic part and a non-magnetic part. The non-magnetic part can be directly used for deep-processing of silicon product. The magnetic part can be leached at pressure higher than atmospheric pressure, the leached residue can be used as raw material for iron industry, and leachate is recycled to the normal pressure leaching tank to serve as the needed acid materials for atmospheric pressure leaching. The normal pressure leachate can be used to recover nickel, cobalt and magnesium by methods such as solvent extraction, ion exchange and vulcanization precipitation. The method of the invention can be applied to various red soil nickel ores containing Fe and Magnesium, realizes cyclic utilization of acid and comprehensive recovery of nickel, cobalt, iron, silicon, magnesium and other metals and greatly reduces volume and amount of scale buildup of a high pressure autoclave, thus being a low-cost environment-friendly technology for efficiently disposing the red soil nickel ore.

The invention discloses a nursery stock planting method on coral sand of a newly-built tropical dredger-reclaimed reef. The method comprises the steps of 1, adopting a nursery stock of which the height does not exceed 3 m; 2, treating the nursery stock with ABT rooting powder; 3, digging a planting pit, and leaching the plating pit with desalination seawater; 4, covering the bottom of the planting pit with red nutrient soil; adopting the desalination seawater to leach the coral sand or sea sand dug from the planting pit, and refilling the coral sand and the sea sand; 6, paving the surface of the planting pit with a layer of red nutrient soil, and irrigating with the desalination seawater. According to the nursery stock planting method on the coral sand of the newly-built tropical dredger-reclaimed reef, by leaching the coral sand or the sea sand with the desalination seawater, the salt and alkali content is lowered, the cycle is short, and the cost is low; by covering the red nutrient soil, not only is the soil structure of the planting pit improved and the pH value of the coral sand or the sea sand lowered, but also the red nutrient soil can be served as a bottom salt and alkali isolation layer; by using the coral sand and the sea sand as planting soil, not only is the cost saved, but also the original ecology of the reef is guaranteed; according to the planting technology, the survival rate of the transplanted nursery stock on the newly-built dredger-reclaimed reef is raised to 95% or above.

The invention provides a method for collecting native mangrove plant lumnitzera seeds and culturing seedlings. Mature lumnitzera seeds are collected, fallen seeds under trees are collected, the seedsgerminate after being aired, the seeds are evenly scattered on the surface of a seedling bed, a seeding bed medium is prepared by mixing peat soil, coco coir, red soil and river sand, the seedling bedis covered with a gauze element, a rooting powder solution is sprayed, and water is sprayed on the seeds on the seedling bed regularly two days after the rooting powder solution is sprayed so that the seeds can keep in a wet state; the seedlings together with soil around the seedling roots are transplanted into nutrient bags containing nutrient soil after the heights of the seedlings exceed 5 cm,brackish water is regularly sprayed so that the nutrient soil in the nutrient bags can keep wet, and a water-soluble fertilizer is applied; the seedlings together with the nutrient bags are transplanted into a nursery garden at a riverway estuary after the heights of the seedlings exceed 15 cm; lumnitzera seedlings are obtained after the heights of the seedlings exceed 30 cm. The method is suitable for seedling culturing of the mature seeds on plants and fallen seeds under trees, and the large-scale lumnitzera seedling culturing can be realized.

A method for intercepting soil nutrients by constructing composite grass strips in a red soil slope field comprises the following steps: (1), grass variety constitution and selection: seeds of at least two grass varieties having different functions and being capable of remaining rapidly available nitrogen, rapidly available phosphorus and rapidly available potassium nutrients in soil simultaneously and respectively are selected; (2), land preparation and fertilization: drilling strips are formed, and fertilization is performed in the strips; (3), presowing treatment of the seeds: the grass seeds are dressed before sowing; (4), sowing: the grass seeds after dressing are spread in the strips and covered with a fine soil layer or a fine sand layer; (5), field management: watering is performed before and after seedling emergence, seedling checking and reseeding are performed, weeds are removed, dressing of a hole applied fertilizer is performed, and cutting is performed. When the method is used, the nutrients of the red soil slope field can be retained substantially, nutrient loss is reduced, the soil fertility is improved, a water eutrophication process is slowed down, and environmental protection is facilitated.