357 results about "Root length" patented technology

The invention relates to a determining method for indicating salt tolerance of different varieties of barleys at seedling stages and belongs to the field of agriculture. The determining method includes adopting a water culturing manner to simulate salt environment artificially, investigating salt damage degree of samples to be tested under the condition of salt stress compared with the blank control condition by measuring seedling height, root length and fresh weight of each seedling of different treatment, and finally determining salt tolerance of the variety. The determining method can be widely applied to screening and evaluation of plant stress resistance genetic resources, particularly used for screening of barley salt-tolerance variety resources, salt-tolerance QTL (quantitative trait locus) genetic analysis, salt-tolerance gene positioning and seed selection of salt-tolerance barley varieties. The determining method has the advantages of simplicity, easiness in mastering and reliable results, the whole salt-tolerance determining process is under control and is slightly affected by the environment, requirements for equipment are low so that only one common illumination culturing box is required.

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

The invention discloses an irrigation control method and system for saline-alkali soil. The irrigation control method includes the following steps that parameters are set, soil water content of all soil layers of a root zone is monitored, root zone weighting average soil water content and root zone weighting average soil water percolation are calculated based on relative root length density distribution, and CWSI is calculated; when a CWSI calculation value is larger than a preset CWSI critical value, irrigation is started; the theoretical irrigation amount is calculated according to soil water content distribution in a planned moisture layer. When the practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system for saline-alkali soil, influences on transpiration and growth of crops by soil water content, salinity and root distribution are comprehensively considered, the water stress degree of the crops on the saline-alkali soil are estimated more accurately and more conveniently and an effective tool is provided for achieving the purposes of saving agricultural water and boosting the yield of the saline-alkali soil.

The invention discloses an identification method of a salt-tolerant resource in the seedling period of cowpea, which is easy to operate and reliable in identification result. The identification method comprises the steps of carrying out germination experiment by adopting one cowpea variety to screen the optimal ultrasonic treatment method and determine the germination conditions; carrying out salt treatment experiment on three varieties by adopting salt solutions of multiple gradients to determine the optimal treatment condition; carrying out salt-tolerant experiment on 18 cowpea varieties of different genes, and carrying out principal component analysis to determine the optimal regression model. The identification method is used for identifying the salt-tolerant capability of the cowpea with 15d, and is short in identification time; the optimal salt-tolerant indexes of the cowpea are plant height, root length, plant dry weight and root dry weight, the identification method with simple operation and definite index is established, the shape indexes are visualized and convenient to count, and the standard identification method is provided for large-scale rapid identification of salt tolerance in the seedling period of the germplasm resource of the cowpea as well as the salt-tolerant variety selection and salt-tolerant mechanism.

The invention discloses a method for authenticating and evaluating salt tolerance of seedling-stage wheat and belongs to the technical field of agricultural production. According to the method, plants are treated with manually prepared seawater, the membership value Xi of the salt damage rate of each of the four salt-tolerance indexes of the seedling-stage plant height increment, the seedling-stage root length increment, the overground part dry weight and the underground part dry weight is determined, the membership values Xi are accumulated and averaged to obtain the seedling-stage salt damage index Y, and the salt tolerance of the seedling-stage wheat is graded according to the seedling-stage salt damage index Y. The method for authenticating and evaluating the salt tolerance of the seedling-stage wheat not only is closer to actual coastal mud flat agricultural production, but also eliminates the influence of genetic backgrounds on the invested character values. The method for authenticating and evaluating the salt tolerance of the seedling-stage wheat is simple in operation, reliable in result, and capable of reflecting the salt tolerance of the seedling-stage wheat comprehensively and being effectively used for discovery of the salt-tolerance wheat variety and breeding of new varieties.

The invention relates to a new leaf cuttage method for Begonia rex, which comprises the following steps: using sterilized laminar vermiculite as the substrate, and adopting a B5 or 1 / 2MS adventitious bud inducement nutrient solution containing 6-BA of 1 mg / L, KT of 1 mg / L and NAA of 1 mg / L and a 1 / 2MS or 1 / 2MS rooting nutrient solution containing NAA of 0.2 mg / L; in a morning or a cloudy day at the end of spring or in mid autumn, selecting healthy biennial leaves, shearing off leaf stalks, cutting the leaves into leaf pieces, and inserting the leaf pieces in the substrate which is filled in a disposable plastic cup provided with small holes at the bottom and the edge; suspending the plastic cup on a turnover box, wherein the turnover box is filled with the adventitious bud inducement nutrient solution of which the liquid level can reach the bottom of the cup, the adventitious bud inducement nutrient solution should be changed weekly and continually aerated; placing the turnover box under a full exposure intermittent spray to enable the leaf pieces to produce cluster buds; transferring the seedlings into a new cuttage substrate, and replacing the nutrient solution in the turnover box with the rooting nutrient solution to enable the seedlings to root; and transplanting the seedlings when the root length reaches 1 cm, wherein the survival rate can reach 94-97%.

The invention discloses a method for cuttage reproduction of a horseradish tree. Through preparation of matrix, preparation of rooting agent, section of cuttings, cuttage and disposal, after-cuttage management and protection, transplanting, and other stps, the cuttage reproduction of the horseradish tree are completed. By adopting the method provided by the invention, the cutting slips start to form a callus for about 10 days generally, and successively grow fibrous roots; after 4 weeks, about 80% of cutting slips take root. Compared with a routine method, when the cuttage reproduction of the horseradish tree is performed, the callus forming time of the root part of the cutting slips is short, the side roots of the cutting slips are multiple, and the root length is relatively long, an the rooting rate of cutting reaches 86% above. The method for cuttage reproduction solves the problems that it is difficult to take root in the cuttage process of the horseradish tree, and the root part is rotted for too long rooting time; besides, the cuttage survival rate is effectively improved.

The invention discloses a method for inducing blueberries to root by using liquid culture media and permeable matrix, comprising the following steps: (1) preparing rooting culturing media; (2) transferring the healthy and strong blueberry seedlings which are subcultured for 40d and are 3-4 cm high into the rooting culturing media, culturing the blueberry seedlings for 7-10d in the dark and for 12h / d for about 20d under intermitted illumination condition until the blueberry seedlings have 3-7 root systems of 0.5-2 cm long; and (3) transplanting the test-tube blueberry seedlings which are cultured for 30d to root, are 3-6 cm high and have the root length of 0.5-2 cm into the media in which the proportion of turfy soil to moss is 1:1, and managing the blueberry seedlings. The rooting culturing media is prepared according to the following substeps: 1) preparing 0.8 cm*1.2 cm filtering paper balls or defatted cotton balls or 0.2 cm*0.6 cm vermiculites which function as the matrix of the rooting culturing media; 2) preparing rooting culturing solution which has the WPM of 1 / 2, the IBA of 1.0-5.0 mg.L-1, the edible white sugar of 2 percent and the pH value of 5.0-5.2; and 3) adding 6-10 filtering paper balls or defatted cotton balls or 20-30 vermiculites which are soaked by the rooting culturing solution and adding 3-5 ml rooting culturing solution to each culturing bottle and capping the culturing to sterilize according to the routine method. The invention has short rooting period and low production cost, can ensure that 100 percent of the blueberry seedlings can root and over 95 percent of the transplanted blueberry seedlings can survive and realize the rapid industrialized propagation of the blueberry seedlings on a large scale.

The invention relates to control of sandy soil, in particular to a method and application for improving aeolian sandy soil by using peat in the southeast region of Horqin Sands. Peat is mixed in aeolian sandy soil so as to improve the texture, structure, moisture retention and organic content of the soil. After mixing, the aeolian sandy soil contains 2-8 percent of peat by weight percent. When the aeolian sandy soil with peat is used for planting celery cabbage, both production and quality of celery cabbage are increased, and plant height, dry weight, fresh weight and root length of celery cabbage are greatly increased.

The invention relates to a heterocyclic asymmetric aromatic dithioether compound and application thereof in herbicide preparation. As shown as in the formula (I), the compound has inhabitation effect to arabidopsis thaliana acetolactate synthase (AHAS) in vitro, has inhabitation effect to rape root length in vivo, has weeding effect for rape and redroot amaranth in potted plant tests, and can be used for preparing novel herbicides containing targeted AHAS. In the formula (I), when X represents S, R1 represents H, C1-C3 alkyl, C1-C3 acylamino, phenyl, hydroxylphenyl phenyl and ortho-C1-C3 alkoxy phenyl, R2 represents H, ortho-nitryl or para-nitryl, ortho-halogen or para-halogen, ortho-C1-C3 alkyl or para-C1-C3 alkyl, ortho-C1-C3 carbalkoxy, para-C1-C3 alkoxy and 3,4-benzo; and when X represents O, R1 represents H, phenyl, hydroxylphenyl phenyl, ortho-C1-C3 alkoxy phenyl, 4-pyridyl and 3-pyridyl, and R2 represents H, ortho-nitryl, para-C1-C3 alkyl and ortho-C1-C3 carbalkoxy.

The invention relates to a Hanfu apple nursery stock top grafting method, which comprises the following process steps of: 1, selecting high-quality virus-free pest-free malus baccata borkh stock seedlings as rootstocks for culturing Hanfu apple seedlings and getting ready for grafting Hanfu apple nursery stocks; 2, picking scions from virus-free Hanfu apple trees with the life cycle of 4 to 12 years; 3, grafting the scions to the virus-free Hanfu apple trees; 4, performing bud grafting at the end of July and at the beginning of August; 5, grafting buds of nursery stocks at positions which are 35 to 40 centimeters higher than the ground; 6, removing branches and bounding strips; 7, removing shoots and applying fertilizers before sap flows; 8, ensuring that the height of the seedlings is not more than 1.3 meters, the root length is 20 to 25 centimeters and more than 6 roots are grown; 9, lifting the seedlings before the freezing season; and 10, lifting and grading the nursery stocks at the same time, and storing with sand. The method has the advantages that: the resistance of tree bodies grown from the cultured nursery stocks is greatly increased and the trunks or main branches of the apple trees can be effectively prevented from being frozen and rotted.

The invention discloses a cultivation method of wild lycium ruthenicum, relates to a cultivation technique, and belongs to the field of agricultural cultivation. The cultivation method of the wild lycium ruthenicum is characterized in that hot water dipping and substrate cultivation are conducted to seeds, prepared nutrient solutions are used for drop irrigation, and so that essential nutritional ingredients needed for the growth of the wild lycium ruthenicum are satisfied. The cultivation method of the wild lycium ruthenicum has the advantages that through the drop irrigation, water controlling and fertilizer controlling, the antioxidant function of wild lycium ruthenicum seeds is enhanced, the germination rate of the seeds under the condition of an adversity growing environment such as drought and salt stress is improved, critical germinating conditions are enhanced, growing of seedlings is rapid after the seeds germinate, the grass height and the root length of the seedlings are obviously lengthened, and the fresh weight of the seedlings is increased significantly.

The invention belongs to the field of plant biotechnologies and particularly discloses a culture medium and culture method for promoting the growth of regeneration buds of echinacea purpurea. According to the culture medium, DA-6 (diethyl aminoethyl hexanoate) of corresponding concentration is particularly added to an MS formula in accordance with that the regeneration buds of different ploidies have different sensitivities to DA-6, besides adding 15-60g / L of saccharose, 3-9g / L of agar and 0.01-0.2mg / L of NAA (naphthalene acetic acid). The culture medium has the advantage that the height, weight, the weight, diameter and number of roots, the length of primary roots, total root length, root cap ratio and transplanting survival rate of the regeneration buds all can be increased remarkably. By applying the culture medium and the culture method, the development of the scientific research work related to the biotechnological breeding of echinacea purpurea can be promoted.

Small sheds are adopted for carrying out seedling cultivation for green Chinese onions in the Spring, high-quality seeds are selected, a seed bed is well maintained, sufficient water and fertilizer are applied, bud forcing treatment is carried out on the seeds, then fine earth with 20-30 times of the weight of the seeds is evenly mixed with the seeds, and the seeds are sown in the middle ten days of the March. Sufficient water and fertilizer are applied in a growing period, weeds in the seed bed are removed, ventilation and cooling are carried out when the temperature in the small sheds reaches 35 DEG C, and the temperature in the small sheds is maintained between 25 DEG C to 35 DEG C. Hardening of seedlings, exercising the seedlings and strong seedling promotion are carried out in the middle ten days of the May. According to investigation and statistics, the average stem diameter in the spring seedling process is 0.9cm, the average plant height is 55cm, the average root length is 10cm, the average number of roots is 29, the average stem length of the green Chinese onions is 3cm to 4cm, the rate of seedlings of the first grade reaches more than 80%, the average yield per mu is 2825 kg after transplantation, the average unit price is one yuan, and the average income per mu is 2825 yuan. The spring seedling cultivation for the green Chinese onions enables the seedling cultivation for the green Chinese onions to develop towards double-season and diversification modes, planting time is short, cost is low, and time and labor are saved. The spring seedling cultivation can provide sufficient green Chinese onion seedlings of high quality, and the industry of the green Chinese onions is made to be developed stably and continuously.

The invention discloses a method for screening of paddy rice with weed inhibiting function in laboratories. In the method, the paddy rice is promoted to form seedlings by utilizing the characteristic that root and rhizosphere agar extract of a new rice variety with the obvious weed inhibiting function can inhibit the growth of weeds obviously and by agar culture so as to obtain the root and rhizosphere agar extract quickly; and barnyard grass of which the dormancy is broken away is cultured by the extract, the growth condition of the barnyard grass is observed, the sprouting percentage, root length and seedling length of the barnyard grass are measured, and the weed inhibiting performance is identified to screen the paddy rice with the high weed inhibiting function. The method has the characteristics of simplicity, quickness, accurate results and the like, and can be widely used for the auxiliary breeding of the weed inhibiting paddy rice.

The invention introduces an installation process for cast-in-place bridge basin-type rubber bearings, which includes the following steps: 1) during construction, pouring the cushion stone concrete according to the height of the support; 2) when the cushion stone concrete reaches the design strength, Grind the backing stone and draw the centerline and sideline of the support; 3) Prepare several steel support piles of appropriate length, drill holes in the support stone, and insert the steel support piles into the holes as support points; 4) Adjust the steel support pile elevation; 5) Clean up the pad stone and reserve bolt holes; 6) Install the wooden strip frame on the outer edge of the support; 7) Install the bolts under the support in place, and conduct a trial installation of the support; 8) Prepare epoxy mortar and Pour it into the reserved bolt holes and evenly spread it on the pad stone, and install the support in time; 9) Remove the wooden strip frame on the outer edge of the support, and then install the bolts on the support; 10) Health preservation. The installation process of the present invention combines two fillings into one, which improves the installation accuracy, faster installation speed, and significantly improves the filling quality.

The invention discloses special organic fertilizer for Hainan fragrant rosewood. The organic fertilizer comprises raw materials in parts by weight as follows: seafood waste, animal dung, tea waste, egg shells, soya bean meal, attapulgite, chillies, bread crumbs, alpha-amino acid, a molasses fermentation broth, oilseed rape shells, loofah sponges, corn stigma, peanut coat, winter bamboo shoot shells, corn bran, walnut shells, hazelnut shells, peanut hulls, ginger peel, coconut shells, durian shells, longan shells, litchi shells, garlic skin, cactuses, areca nuts, Japanese dock root, chinaberry tree bark, pumpkin seeds, willowleaf swallowwort rhizome, rhizoma arisaematis, divaricate saposhnikovia root, solomonseal rhizome, , benzoin, aquilaria sinensis, villous amomum fruit, panax notoginseng, wolfiporia extensa, sophora flavescens, mint and Chinese pulsatilla root. The invention further discloses a preparation method of the special organic fertilizer for the Hainan fragrant rosewood. The organic fertilizer for the Hainan fragrant rosewood contains rich organic matters, improves the drought resistance, cold resistance and disease resistance, and remarkably increases the seedling height, the ground diameter, the root length and the biomass.

The invention discloses a tissue culture and regenerated plant in vitro mycorrhization method for pinus massoniana, which belongs to the technical field of biotechnology and modern forestry. The method comprises the following steps of: taking a terminal bud of an aseptic seedling of the pinus massoniana as an explant, inducing to produce a large quantity of multiple shoots with strong growth first, further inducing the generation of an adventitious root, transferring a plant with the macroscopic adventitious root onto a perlite substrate under the condition of asepsis after the induction of the adventitious root is finished, and inoculating ectomycorrhizal rungi Pisolithustinctorius at the same time to realize the mycorrhization in a bottle. The mycorrhization improves the quality of a root system of the adventitious root of a tissue culture regenerated plant of the pinus massoniana, and ensures that the average lateral root number and the average root length are greatly improved. The mycorrhization also makes the state of the adventitious root greatly changed, and a fungal mantle obtained by closely arranging more than ten layers of mycelia is formed on the surface of the adventitious root. Through the method, the induction rate of the multiple shoots of the pinus massoniana reaches 95 percent, the proliferation rate reaches 430 percent, the rooting rate reaches 85 percent, and the transplantation survival rate is improved to more than 85 percent from 65 percent.

The invention discloses a method for breeding wheat by cold plasma treatment. The invention discloses a method for obtaining the wheat with improvement of seed germination ability, and / or reduction of plant height, and / or increasing of root length, and / or increasing of biological yield, and / or improvement of tillering ability, and / or improvement of seed production ability, which processes to-be-processed wheat raw materials by the cold plasma treatment. According to the method for breeding wheat by the cold plasma treatment, the defects of low-level repetition and serious homogeneity of traditional breeding, potential dangers of transgenic breeding, and huge economic investment of space breeding can be broken through, the breeding period can be shortened, and breeding methods and means are advanced.

The invention discloses a breeding method of a heat-resistant red-skin radish and belongs to the technical field of breeding of brassicaceous vegetables. The breeding method is technologically characterized in that the first generation of hybrid of heat-resistant red-skin white radish is obtained by using a sterile line of red-skin radish as a female parent and a red high-generation inbred line of a local variety red-skin white radish in Sichuan province as a male parent. The first generation of hybrid of heat-resistant red-skin white radish has the characteristics that the plant leaves are semi-erect and are plate leaves, blades are green, leaf stalks and middle stems are red, the leaf surface has seta, the leaves are inverted oval-shaped, the leaf margins are crenate, the leaf length is about 36cm, the fleshy root is of a long cylinder shape, the skin is smooth and red, the flesh is white, the root length of the product is 20-25cm, the transverse diameter is 5-6cm, and the single weight is about 450g. The heat-resistant red-skin radish is strong in disease resistance and heat resistance, good in commodity property, excellent in quality, not easy to be hollow, short in growth period, and suitable for outdoor cropping in various regions in summer, autumn and winter.

The invention discloses microorganism nitrogen-fixing bacteria. The microorganism nitrogen-fixing bacteria is classified and named as microbacterium trichothecenolyticum SPJ01, and is conversed in China Center for Type Culture Collection, the culture conversation number is CCTCC NO:M2016254, and the conservation date is May 6 th, 2016; the application of the microorganism nitrogen-fixing bacteriain soil provides nitrogen elements and phosphorous elements for crops, and relieves the inhibition of growth due to nitrogen deficiency and phosphorous deficiency; the microorganism nitrogen-fixing bacteria serves as a nitrogen-fixing growth-promoting microbial agent in a desert area. The growth inhibition of the crops under the condition of nitrogen deficiency and phosphorous deficiency can be relieved; meanwhile, the crops have an obvious promoting effect on the growth of crop seedlings, and various growth indexes of two kinds of forage like the plant height, the root length, the single leafarea, the single plant leaf number, the root size, the plant size, the overground fresh dry weight, the underground fresh dry weight, the plant fresh dry weight, the root shoot ratio (R / T) and the dry fresh weight (D / F) are all obviously improved.

The invention discloses an in-vitro culturing method for rhodiola dumulosa. The in-vitro culturing method for the rhodiola dumulosa comprises the following steps that 1, stem segments of the rhodiola dumulosa are inoculated onto a callus tissue inducing medium to be cultured to obtain callus tissue; 2, the callus tissue obtained in the step 1 is inoculated onto an adventitious bud inducing medium to be cultured to obtain adventitious buds; 3, the adventitious buds obtained in the step 2 are inoculated onto an adventitious bud multiplication medium to be cultured to obtain multiple buds; 4, the multiple buds obtained in the step 3 are inoculated onto a rooting medium to be cultured to obtain regeneration seedlings. In-vitro culturing of the rhodiola dumulosa is performed by adopting the method, the rooting rate can reach 100 percent, the average rooting number is about 10-15, and the root length is 2-3 cm; regeneration plants are transplanted after rooting is achieved, and the survival rate reaches 90 percent. According to the in-vitro culturing method for the rhodiola dumulosa, an in-vitro culturing regeneration system of the rhodiola dumulosa is built, and the important significance is achieved for effectively protecting and utilizing wild rhodiola dumulosa resources.

The invention discloses a method for promoting seed germination of the Kwangsi mayten herb. The optimal external factor combination of the seed germination of the Kwangsi mayten herb is that a constant temperature is 25 DEG C; illumination intensity is 3,000lx and illumination time is 12h / d; a culture substrate adopts peat soil; growth regulator treating fluid adopts gibberellin (GA3) with the concentration of 3mg / L. Under the conditions, not only is the survival rate the highest and reaches 88.0 percent, but also indexes of germinability, an average root length, germinating performance, the healthy and strong degree of radicles and the like can achieve better effects. The method lays a good foundation for nursery stock breeding of the Kwangsi mayten herb and has very active influence on regeneration and continuous utilization of resources of medicinal plants, which are in imminent danger and in shortage.

The invention relates to a method for cultivating cork oak seedlings. The method comprises the steps of collecting and storing seeds, selecting a seedling cultivating field, regulating a seedling bed, preparing seedling cultivating soil, processing the seeds, soaking the seeds in rooting powder, hand sowing in a nutrition pot, spraying rooting powder solution, lifting and transplanting the seedlings and the like. According to the method, through excellent cork oak forest stand or superior tree seed collection, and as the rooting powder is used for soaking the seeds and the prepared soil, and the rooting powder solution is sprayed for two times, the root length of the seedling which is cultivated for 1-2 years is increased by 30%, and the number and length of rootlets are respectively increased by 40%-30%. The seedling cultivating cost is lowered by 30%. The survival rate of cork oak afforestation by seedlings reaches 85%-90%.

The invention belongs to the technical field of herbal medicinal plant tissue culture, in particular to a rooting method outside a tissue culture seedling bottle of monochasma sheareri. The method mainly solves the technical problems of long rooting period in the tissue culture seedling bottle, more induced aerial roots, low transplanting survival rate and the like, and includes the following steps: (1) selecting bottle seedlings; (2) strong seedling cultivation; (3) hardening seedlings; (4) transplanting tissue culture seedlings; and (5) post-planting management. The method establishes an effective rooting technology outside the tissue culture seedling bottle of monochasma sheareri and optimizes the tissue culture and rapid propagation system. According to the technology, rooting is not required in a bottle, the seedlings are directly transplanted after hormone treatment, two weeks later, new roots can be seen at the base of the seedlings; after 30 days, the number of roots reaches 5-10, and the root length is 0.5-1.5cm; and in about two months, robust rooted seedlings of monochasma sheareri with a seedling height of about 6-10cm can be obtained. Compared with the traditional rooting in a bottle, the seedling raising period is shortened by one month, and the transplanting survival rate is higher than 85%; and by adopting the technology of the method, the rooting seedling quality is obviously improved, and industrial production can be carried out.

The invention relates to a nutrient solution specially used for soilless green seedling growing of astragalus membranaceus. The solution comprises potassium dihydrogen phosphate, magnesium sulfate, calcium sulfate, ferric sulfate, EDTA, boric acid, manganese sulfate, potassium nitrate, zinc sulfate, copper sulfate, molybdic acid and purified water. Combination of the components contains major and trace elements essential for growth and development from astragalus membranaceus seedlings to formation of young plants. A water dissolved substance of the nutrient solution is free of chemical compounds or ions having toxic or side effects or pesticide residues. Through adopting the nutrient solution, prepared branchless astragalus membranaceus plants for planting can be 99% or above, the root length of astragalus membranaceus plants for planting when one crop is grew in one year reaches 40-46 cm, the root length of astragalus membranaceus plants for planting when two crops are grew in one year reaches 35-40 cm, the yield per mu when one crop is grew in one year can reach 4500-5500 kg, and the yield per mu when two crops are grew in one year can reach 3500-4500 kg. Compared with traditional astragalus membranaceus seedling growing methods, the nutrient solution increases the yield per mu, avoids soil-borne diseases, and provides strong supports for large-scale development of the astragalus membranaceus seedling growing industry.

The invention belongs to the field of microbial herbicides and particularly relates to weed suppression fungus screened from passion fruit rhizosphere soil. Lettuce (compositae), barnyard grass (gramineae) and lysimachia barystachys (gramineae) are taken as receptors separately, biological test is carried out on the weed suppression ability of a fungus strain fermentation liquid, and the condition that the weed suppression fungus has a very high inhibition rate on root length and plant height of two receptors is found out. The condition that protocatechuic acid, p-hydroxybenzoic acid, vanillic acid, salicylic acid and cinnamic acid contain phenolic acid with a weed suppression effect is detected in the fermentation liquid. The strain is named FJ-01-BXG-08. The analysis and identification results on the morphology and ITS sequence of the strain show that the strain is one of Aspergillus sydowii (aspergillus sydowii), and strong weed suppression fungus aspergillus sydowii (Aspergillus sydowii) is screened from eucalyptus soil for the first time.

The invention provides a method for improving the yield and quality of a dendranthema morifolium cutting by utilizing grafting, belonging to the technical field of floriculture production. The method comprises the following steps: preparing a rootstock; preparing a scion; grafting and managing; and collecting the cutting. Compared with the currently adopted method in which a cutting seedling is utilized as a scion mother tree, the method provided by the invention has the advantages that the grafting seedling is utilized as the scion mother tree, the growth is vigorous, and the high-yield high-quality cutting can be obtained. In each scion batch, compared with cutting seedlings, cutting yield, average length, average node number, average thickness, average fresh weight and average dry weight of the artemisia scoparia grafting seedling are improved. Furthermore, the cut rooting capability of cutting is improved, the earliest rooting days, the number of adventitious roots, the root length, the root thickness, the root system dry weight and other indexes of cutting rooted seedling are higher than those of the cutting seedling.