228results about How to "Increase planting density" patented technology

The invention discloses a culturing method of one-ridge double-row flue-cured tobacco dislocation, comprising the following steps: (1) selecting tobacco field and preparing soil; (2) ridging; (3) applying base fertilizer; (4) transplanting; and (5) uncovering film, ridging and loading. The method has the following advantages that: (1) on the premise that the use amount of fertilizer for soil in unit area is not changed, the fertilizer use amount of single plant in flue-cured tobacco field is reduced, and the use amount of field organic fertilizer, especially oil cake fertilizer is increased to lead the field tobacco plant to present the growth of middle-plant tobacco, thus obviously improving the tobacco leaf quality; (2) compared with the conventional single ridge, the one-ridge double-row tobacco reduces the labor capability of ridging by about one third, the ridging height is obvious lower than the conventional height, thus reducing ridging labor intensity of tobacco growers; and (3) the one-ridge double-row flue-cured tobacco increases flue-cured tobacco planting density, and meanwhile, a dislocated equal plant distance planting method improves utilization rate of tobacco field to the utmost, ensures the housework operation of tobacco growers, and the row space of the ridge just satisfies growth space of tobacco plants in the field, thus ensuring the income of the tobacco growers.

The invention discloses a high slender spindle-shaped apple tree form and a trimming method thereof. As a whole, the tree form is of high slender spindle shape. After an apple tree is formed, the crown diameter of the apple tree is small, slender and high. The apple tree is 3.5-4.0m high and the trunk of the apple tree is 0.8-0.9m high. Thirty to fifty spirally arranged small boughs are grown on the central leading trunk of the apple tree. The average length of the small boughs is 1m. The average angle between the central trunk and the small bough is 115 degrees. The top-to-bottom spacing among the small boughs on the same side is 0.25m. The trimming method of the high slender spindle-shaped tree form is simple. Other boughs require no decapitation but branch drawing except that the central trunk requires short-cutting in winters in 1-2 years. Thereby, the trimming method can be popularized in tree forms of simplified trimming and low labor strength.

The invention provides a novel column-shaped three-dimensional cultivation method and device for medical dendrobium. The method is characterized by comprising the following steps of making a cultivation device serving as an auxiliary article in a hollow column-shaped body structure; filling a cultivation medium in the interior cavity of the hollow column-shaped body, wherein the hollow column-shaped body is at least 0.5 m in height and at least 8 cm in diameter, the external surface of the hollow column-shaped body is uniformly provided with seedling planting areas, and a cultivation medium composition mainly comprises the following raw materials in parts by volume: 5-15 parts of barks, 10-30 parts of saw dust and 3-10 parts of vermiculite; selecting healthily-growing seedlings to be hardened and then washing the hardened seedlings during cultivating and transplanting the dendrobium seedlings; and after sterilizing by using 800-1000 times of liquid carbendazim, transplanting the seedlings in different plant bunches according to the seedling planting areas, wherein row spaces of the transplanted plants are 4-6 cm*10-15 cm. Compared with the prior art, the cultivation method provided by the invention is very suitable for growth habits of the wild medical dendrobium; and the medical dendrobium cultivated by using the invention has the advantages of easiness for material obtaining, low cost, long service life, good water retention and fertilizer securing effects, high planting density, land utilization rate capable of being increased by 6-7 times, high and stable yield, good product quality and convenience for management.

This invention published a cultivate and manage method about the 'one side down' of a fruiter when cultivate in protective area after planted the fruiter in spring, put the stem incline to the ground and keep 35 to 45 degree angle with the ground in July of the year. When cultivate in wild area, incline the stem of fruiter about 65 to 75 degree angle with the ground. If the fruiter planted in the south and north line, incline to west. If the fruiter is planted in the east and west line, it will incline to south. After planting fruiter, keep a single stem in favor of manage. Make the plants incline to one side by shaping and maintain the trunk distance 0.8-1 m and the row distance 1.8-2 m, and on-earth trunk distance 1-1.3 m and row distance 2.5 m. The invention has a lot of characteristics including high productivity, high quality and well management. Therefore, it has a good market profit.

The invention discloses a high-yield summer corn cultivation method, which comprises the following steps: applying tuza fertilizer, diammonium phosphate, urea and potassium sulfate to each mu of land, and ploughing the materials, which are mixed uniformly, under the ground; selecting compact-type improved high-yield corn seeds; before sowing, soaking the seeds in warm water at a temperature of 18-25 DEG C for 4-7 hours, carrying out ventilating and drying on the seeds; mixing the seeds with anticorrosive fungicide and insect repellant; sowing in large and small lines at intervals and in a staggering manner, wherein the distance between each two adjacent large lines is 40cm-50cm, the distance between each two adjacent small lines is 20cm, the planting distance is 23cm-24cm, the sowing depth is 3cm-5cm, and 2 to 3 seeds are sown in each seed cave and are positioned at intervals of 2cm; carrying out thinning and filling the gaps with seedlings after corns grow to have 3-4 leaves, then carrying out final singling of the seedlings; and carrying out intertillage on the corns when the corns grow to have 5-8 leaves, dressing 8kg-10kg of urea on each mu of land, and when the corns grow to have 8-9 leaves, and ploughing a groove of 10cm-12cm among the large lines to bury weeds so as to achieve an effect of corn ridging.

The invention relates to a relay intercropping method for rheum palmatum and corn. The relay intercropping method for the rheum palmatum and the corn is characterized by comprising the following operating steps: (1) selection and preparation of land; (2)corn nutritive cube or tray seedling;(3) corn plastic film mulching cultivation; (4) culture of rheum palmatumseedling; (5) rheum palmatum transplantation; and (6) rheum palmatum field management. Compared with the prior art, the relay intercropping method for the rheum palmatum and the corn has the advantages that rheum palmatum and high-stem crop corn relay intercropping is enabled to artificially create a damp environment where is beneficial to the growth of the rheum palmatum and the high-stem crop corn, the growth of the rheum palmatum is benefited, and output and quality of the rheum palmatum can be improved. Furthermore, temperature, light, water and land resources are fully utilized. Grain yield can be increased by two seasons in an equal area on the premise that planting density and output of the rheum palmatum are not reduced, the contradiction that grain crops and medicinal crops contend the land is effectively alleviated, and economic benefit is drastically improved. In addition, relay intercropping method for the rheum palmatum and the corn has the advantages of being easy and convenient to operate, capable of saving cost and easy to popularize.

The invention discloses a planting method of jute in heavy-metal contaminated soil. The method comprises the following steps of: A, preparing soil and building a field, and applying passivator to reduce activity of heavy metal in the soil; B, selecting a specific jute variety with strong heavy metal contamination resistance, sowing in an enough amount at proper time to guarantee full seedlings; C, determining appropriate close planting, thinning / finally singlings in good time, and reserving enough basic seedlings; and D, intertilling / weeding in time, rationally topdressing / irrigating to culture effective strong plants; E, reinforcing prevention and control of diseases and insect pests to realize high yield of jute. By the jute planting method, the average yields of raw stems in light, medium and heavy contaminated jute fields are respectively 181.0+ / -16.4, 174.9+ / -15.7 and 158.5+ / -15.3kg / mu, which reaches the high-yield level of the jute growing area in South China; and the content of heavy metal in raw jute can be controlled in a range of related standard limit, so that agricultural safety and effective utilization of heavy metal contaminated soil can be realized. The method is simple in technology and practical, and has wide application prospect in broad heavy metal contaminated areas.

The invention discloses a high-yield cultivation method for peanuts, comprising the steps of fertilizer applying, seed drying, seed sowing, leaf fertilizer spraying and chemical control. In the invention, the steps are adopted to cultivate the peanuts so as to make soil nutrients comprehensive and rich and sowing density increased, fully meet the demands of the peanuts on nutrients due to additional fertilizer supplement by human labor and timely chemical control, and generate fertilizer response to the greatest extent, thereby the yield and the quality of the peanuts are greatly improved, and more than 600 kilograms of the peanuts per mu can be yielded.

The invention discloses a ralstonia solanacearum disease resistance high density identification method in the field, comprising: 1) cultivating ralstonia solanacearum disease nursery; 2) tidying disease nursery field in due time: before tobacco in the disease nursery is transplanted, tidying land to reach the requirement of ridging, furrowing and covering with a mulching film due to finely divided soil; according to the requirement that the width of each furrow is 1.5-2.5m and the ditch width between furrows is 0.5-0.7m, making a furrow, levelling furrow surface, and adjusting length according to the size of a plot; 3) determining cultivating density, and adopting a parallel furrow transplant mode: transplanting more than 3-5 lines in each furrow with the row spacing of 0.2-0.4m; 4) reasonably applying fertilizer, and strengthening field management: at the weight ratio of 1:1-2:1-2 of nitrogenous fertilizer, phosphatic fertilizer and potassic fertilizer, adopting a mulching film covering mode, and paying attention to field irrigation; and 5) inspecting and grading state of illness. The invention has the advantages that the ralstonia solanacearum disease resistance high density identification method in the field improves large field identification efficiency of ralstonia solanacearum disease resistance, can be applied to identify ralstonia solanacearum disease resistance, can improve identification material for above 4-6 times under the condition of same capital and disease nursery area and can be applied to breed ralstonia solanacearum disease.

The invention relates to a white asparagus ridging-free cultivation method and belongs to field of asparagus cultivation. White asparagus is produced by using a high-density sunshade net to make a frame so as to cover the white asparagus, ridging-free cultivation is achieved, a planar support is 40cm away from a bed surface, the sunshade net covers the periphery of the support, a layer of straws is laid on the sunshade net to enhance sunshade effect during the asparagus harvesting season, the sunshade net is 6-stitch high-density black sunshade net with sunshade rate as high as 95%, sunshade processing can be performed effectively, matched farm operations such as water and fertilizer management and asparagus harvesting are provided, the produced white asparagus is pure white in color, and the average yield per mu can reach more than 1200kg in the second year of planting. Compared with traditional earthing blanching cultivation methods, the cultivation method has the advantages that steps such as ridging and ridge removing are omitted, asparagus can be harvested without push aside soil layers, labor is saved, white asparagus production efficiency is increased, large planting density and high yield are achieved, and the cultivation method is suitable for being popularized and applied, especially suitable for white asparagus production in the southern areas, and is promising in application prospect.

The invention discloses an intelligent control indoor planting field system using an LED plant growth-promoting lamp as a background. The intelligent control indoor planting field system aims at meeting the demand for energy-saving, environment-friendly and intelligent planting and is characterized by comprising a growing rotation module, a plant growing box module, an LED light source module, a water supply module, an energy supply module, a central control module and a user terminal. A user can check the plant growing situation through a mobile terminal and a PC terminal and meanwhile can adjust the light matching and strength, temperature, carbon dioxide concentration and moisture parameter of the plant growth-promoting lamp through the terminals so as to meet the growing demands of different plants.

The invention discloses a cultivation method of pitayas and belongs to the technical field of agricultural planting. The cultivation method includes screening varieties, raising seedlings by cutting, preparing soil and setting posts, planting, irrigating and fertilizing, controlling diseases and pests, performing field management and the like. The cultivation method has the advantages that the space of a pitaya planting base is optimized, pitaya cultivation racks in rows are utilized to increase pitaya planting density, an interval of 2.5-2.8m is reserved between every two planting ridges to serve as the passageway for manual and mechanical operation, manpower cost and management cost can be lowered, high pitaya yield and good pitaya quality are achieved, the produced pitayas are rich in selenium content and meet the requirements of selenium-rich fruits, and the method is suitable for being popularized and used in a large-scale manner.

The invention discloses a method for planting ramie in soil seriously contaminated by heavy metal. The method comprises the following steps: A, selecting a specific variety of ramie with high resistance against heavy metal contamination and cultivating strong ramie seedlings by using a young shoot cottage propagation technique; B, constructing a ramie garden and applying a passivator to reduce the activity of heavy metal in the soil; C, transplanting in right time and carrying out rational close planting; D, scientifically carrying out cross dressing and cracking stems in right time; and E, preventing and controlling insect disease prevention in time and strengthening winter cultivation management of the garden. Practical results show that the yields of the newly planted ramie garden in the current year and the next year are respectively 71.8-74.3kg / mu and 84.8-86.3kg / mu, which are basically the same as those of the newly planted ramie garden with clean soil at the same term; moreover, the content of heavy metal in the raw ramie garden can be controlled in a range specified in related standard, and the safe and efficient agricultural utilization of soil seriously contaminated by heavy metal is implemented. The method is simple and convenient in technique and easy to implement and can be popularized to and applied by mass farmers and departments of agricultural technology in areas with serious heavy metal contamination.

The invention discloses an indeterminate-cultivation pruning method for hot pepper. Before hot peppers become dense, only the root of each pepper plant is subjected to soil moisture conservation and soil loosening, and water flush fertilizer is applied timely. After the dense peppers at the top of each pepper plant set normally, four main branches are selected, and other lateral branches are pinched or twisted. Later, more fertilizer is applied, and water is sprayed. After the dense peppers at the top of each pepper plant are ripe and harvested, the four main branches are hung with hanging cords, and all excess branches are removed. When the pepper plant continues to set fruits, fruits are reserved on the four main branches and lateral branches on the main branches. After fruit setting, the lateral branches are pinched. After the peppers on the main branches and the lateral branches of the main branches are ripe and harvested, the lateral branches are moved. The method is cycled to allow the main branches and the lateral branches to grow and set fruits indeterminately. By the pruning method, the plants are kept vigorous in early stage of growth of the peppers, fruit setting rate is increased, and early yield is increased. Light transmission in mid- and late stage of the peppers is increased, photosynthesis is enhanced, air permeability is improved, disease resistance of the hopper pepper is enhanced, and high yield and high quality in the whole grow cycle of the hot pepper are guaranteed.

The invention relates to a tissue engineering myocardium bioreactor constructed by pouring, perfusion and pulsation combination, belonging to the technical field of tissue engineering and biological engineering manufacture. The bioreactor comprises a cell pouring generator, a perfusion module, a pulsation generator, a culture module and a control module; the cell pouring generator, the perfusion module and the pulsation generator are communicated with the culture module through pipelines; and the culture module comprises a pulsation cavity, a pulsation effect soft tube with one closed end and a perfusion cavity, and the perfusion module and the pulsation generator carry out perfusion culture and pulsation training. The invention can improve cardiomyocytes planting depth and simulate myocardium in vivo environment, and carries out culture to obtain a tissue engineering myocardium with larger thickness and autonomously beating capacity. The bioreactor is used for realizing that the tissue engineering myocardium construction carries out perfusion culture and pulsation training simultaneously or separately on cell perfusion and tissue culture stages in a cell planting stage.

The invention discloses a method for cultivating grapes in greenhouses. The method for cultivating grapes in the greenhouses comprises the following steps: 1) selection of grape varieties and nursery stocks; 2) selection of greenhouse and heat insulation materials; 3) selection of cultivation method; 4) selection of cultivation frame; 5) selection of irrigation methods; 6) management of water and fertilizer; 7) management of planting and after planting; 8) prevention and control of diseases and insect pests; 9) overwintering management; 10) management of the second year of promoting early germination; 11) management of the second year of growth period; 12) and management of the third year and the years after: the same as the second year. The method for cultivating grapes in greenhouses has advantages that compared with the traditional cultivation method, the cultivation method provided by the invention enters the high-yield harvest period 2 years earlier and the early yield is increased by more than 60%; compared with the traditional cultivation methods, the product is on the market for 40- 50 days ahead of schedule; the quality of fruit is greatly improved; meanwhile, the effects of saving water, saving fertilizer and resisting salt and alkali can be realized; the early high yield and continuous high yield are achieved; the economic benefit is improved and increased by more than 2 times.

The invention discloses a two-line synchronous corn-culturing method with wide-narrow hill spacings at ridge sides, and relates to a ventilation corn culturing method with high light-efficiency utilization. The culturing method comprises the main steps of: ridging, soil scraping at a ridge surface, furrowing, sowing, earth backing, fertilization and regulation. The specific requirements are as follows: the land is prepared and ridged, and the ridge spacing is 65-70cm; and the two ridges form a combined body, 1800-2000 holes are sowed in each acre with two seeds for each hole; and the line spacing of the narrow lines in sowing is 40-50cm, the line spacing of the wide lines in sowing is 80-95cm, the distance between the two-line synchronous wide-line holes is 70-66cm, and the distance between the two-line synchronous narrow-line holes is 35-33cm. The two-line synchronous corn-culturing method with the wide-narrow hill spacings at the ridge sides, disclosed by the invention, has the advantages that the blank for two-line corn planting with large-ridge soil preparation is filled, and the two-line corn culture at the ridge sides can be used to achieve the same benefit as that of the two-line core culture at large ridges. Superior to the single-side ventilation of two-line corns at the large ridges, the two-line synchronous corn-culturing method can be used to realize two ventilation side surfaces for each corn plant, and the cross ventilation of large-area corns, so that the light-efficiency utilization for the corns is increased.

The invention belongs to the technical field of plant planting, and particularly relates to a planting method of polygonum multiflorum. The planting method is characterized by comprising the following steps of (1) land arrangement before planting; (2) cuttage and culture of seedlings; (3) field management; (4) control of pests and diseases; (5) harvesting. The planting method has the advantages that the output of the polygonum multiflorum is obviously improved, the planting method is simple, the planting cost is low, and the quality is stable.

The invention relates to a simple, convenient and safety overwintering cultivation method of figs. The method includes the steps: performing soil preparation, soil improvement and field planting; pruning; applying fertilizers; performing irrigation and the like. A cultivation frame is a 'T'-shaped hedge frame and is high in early yield and beneficial to ventilation of plants, fruits can be sufficiently irradiated by sunlight, and produced fruits are high in sugar degree, fine in coloring, thick in fruit powder and fine in quality. The growth heights and the fruit setting positions of the plants can be controlled by a pruning mode, planting density is increased, the proper number of branches and proper pruning length are determined, the plants are conveniently managed and do not easily suffer from wind chill, and mechanical operation can be performed. By the aid of the technology, the pruning technology of traditional fig production is simplified, the difficulty in pruning, picking and cold protection is overcome, so that planting area is enlarged, and work and labor are saved.

The invention relates to a new method for wide and narrow row and compact planting of kiwi fruits by adopting tilting trellises. The kiwi fruits are planted in wide and narrow rows, and tilting trellises are built along the rows; in each wide row, a plurality of column units are arranged; each column unit consists of two vertical columns with the same length; the two columns tilt towards each other between the wide rows, and the upper ends of the two vertical columns intersect to form a herringbone; the column units in two adjacent rows are equidistantly arranged in a staggered way; four iron wires are equidistantly arranged vertically on the tilting vertical columns in each row for the kiwi fruits to climb; only trunks of the kiwi fruits climb onto the trellises, and a single-arm four-layer or two-arm four-layer shaping technology is adopted; through herringbone intersections at the upper ends of the column units, an intersect parallel iron wire mesh is formed in vertical and horizontal directions, and the iron wire mesh is covered by a wind-proof and sunlight-shading net or a brightening and cold-proof film. Compared with the prior art, the new method has the advantages as follows: the planting density is more reasonably increased, the population structure is more scientifically improved, the utilization rate of light energy is more effectively improved, ecological resources are more fully utilized, and production targets of high yield, high quality and high efficiency are achieved.

The invention discloses a method for planting kenaf on heavy metal contaminated soil. The method includes the following steps: A, preparing the land and building an area, and applying an passivant to reduce the activity of soil heavy metal; B, selecting a specific kenaf variety with high heavy metal pollution resistant capacity, sowing sufficiently in due time, and guaranteeing a full stand through one sawing; C, determining suitable close planting, performing thinning and final singling in due time, and reserving basic seedlings; D, intertilling and weeding timely, topdressing and irrigating reasonably, and cultivating effective strong plants; and E, strengthening pest control and achieving high yield of the kenaf. The original kenaf outputs of mild, moderate and serious contaminated kenaf gardens are 276.2+ / -25.5, 247.6+ / -23.4 and 220.9+ / -21.2kg / mu respectively when the method is used for planting the kenaf, the high yield level in southern kenaf areas in our country is reached, content of heavy metal in the original kenaf can be controlled within a relative standard limit, agricultural safety and efficient utilization of the heavy metal contaminated soil are achieved, the technique is simple and convenient, the method is easy to implement, and an extremely wide application prospect is provided in vast heavy metal contaminated areas.

The invention discloses a novel soilless blueberry cultivation method. The novel soilless blueberry cultivation method mainly includes the steps of container selection, medium selection and supporting drip irrigation facility construction, wherein in container selection, since blueberries belong to shallow-rooted plants and root systems of the blueberries are vertically distributed at 10-50 cm, root control devices with the diameter of 80 cm and the height of 40 cm are selected, and planting spacing is 1*2 m; in medium selection, coconut chaff with an EC value smaller than 0.8 mS / cm serves as a culture medium and is covered with rice chaff 10 cm in thickness, and blueberry seedlings are planted after the coconut chaff is soaked; in supporting drip irrigation facility construction, drip irrigation pipes 16-20 mm in diameter are adopted above the root control devices. The novel soilless blueberry cultivation method is capable of accelerating blueberry root growth remarkably, increasing the blueberry yield, controlling weeds and saving labor cost.

The invention discloses an intercropping and rotation planting method with complete field return of corn and soybean stalks, comprising the steps of (1), carrying out planting according to a corn andsoybean intercropping proportion of 8:8, interchanging corn and soybean planting belts in next year and carrying out crop rotation in a period of two years; (2), smashing corn stalks to obtain small sections, and uniformly spraying stalk decomposition agents to the surfaces of the smashed corn stalks; (3), deeply turning the corn stalks into soil layers at the depths of 25-30 cm, and then carryingout harrowing operation; (4), flatly sowing soybean seeds through no-tillage fertilizer applying and seed sowing machines in the next spring, applying fertilizers to the soybean seeds through the no-tillage fertilizer applying and seed sowing machines in the next spring and carrying out big-ridge twin-row planting; (5), omitting mechanical plowing operation after soybeans are harvested, carryingout large-ridge twin-row planting on corn through no-tillage technologies in the next spring, flatly sowing corn seeds by the no-tillage fertilizer applying and seed sowing machines, and applying fertilizers to the corn seeds through the no-tillage fertilizer applying and seed sowing machines. The method provided herein has the advantages that operating is simple, and the method is low in cost andis environmentally friendly, and the corn and soybean yields can be effectively increased.

The invention discloses a trunk type fruit tree one-side leaning technology, wherein main branches lean towards one side, are straight and grow obliquely, and tree bodies take the shape of fishbone-shaped fans and are uniform. During protected cultivation, after fruit trees are planted in spring, main trunks of entire fruit trees are inclined to keep an include angle being 35-45 degrees with the ground in July in the current year, and during open field cultivation, the main trunks of the fruit trees are inclined to keep an included angle being 65-75 degrees with the ground in the first year. When the fruit trees are planted in south-north rows, the main trunks of the fruit trees are adjusted to incline towards the west, and when the fruit trees are planted in east-west rows, the main trunks of the fruit trees are adjusted to incline towards the south to form a one-side leaning shape. After the fruit plants are planted, one main branch is preserved for each fruit tree and the fruit tree adopts single main-branch type management, the main branches are pruned and formed into the one-side leaning shape; during protected cultivation, the planting distance is 0.8-1m and the row spacing is 1.8-2m; and during open field cultivation, the planting distance is 1-1.3m and the row spacing is 2.5m. The trunk type fruit tree one-side leaning technology disclosed by the invention has the characteristics of high speed in putting into production, high yield, good quality, simpleness for management, less investment, market orientation, gale resistance, long life and attractiveness for sightseeing.

The invention discloses a thick planting method for green onions. The method comprises: sowing seeds precisely according to spacing in rows of 3 to 6 centimeters; when the seedlings are 40 centimeters high, driving timber piles around green onion plots; fixing straw on the timber piles to make a straw mat; fully irrigating and fertilizing the green onions; spraying straw carbon onto the onion plot till the topmost leaf outlet without covering the core leaves; spraying water onto the straw carbon till the straw carbon is wet; afterward moving the straw mat 10 centimeters up every time the leafoutlet grow 10 centimeters; spreading straw carbon on the land till the topmost leaf outlets; spraying water onto the straw carbon till the straw carbon is wet; removing the straw mat in a green onion harvesting season; and harvesting and packaging the green onions and selling the green onions. Compared with the prior art, the method improves planting density by 10 to 20 times, and saves a large amount of land; as transplanting is avoided, lots of labor is saved; and covered by soft straw carbon, the onions only have a small part buried in soil and therefore can be drawn out directly, so the labor for harvesting onions is saved.

The cultivation method of super early mature cotton includes selecting the cotton variety with genetically limited fruit bearing shoot or zero-type shoot in the 2-4 fruit bearing shoot positions; thrice spraying marketable mepiquat chloride of the amount of 1-1.5 g, 1.5-2 g and 2-3 g each mou in the full bud stage, the initial bloom stage and the full bloom stage separately. Compared with available similar variety, the present invention has growth period as short as 101 days, planting density up to 6000-12000 plants / mou and about 50 % raised cotton yield.

The invention relates to a physical protector in the processes of growing Chinese cabbages and transporting harvested Chinese cabbages. A supporting framework and a screen bag are connected together to form the physical protector, the supporting framework is square, and comprises supporting rods and top rods, the top ends of the neighboring supporting rods are sequentially connected together by the top rods, and hooks are arranged at the vertex corners of the supporting framework; the top end of the screen bag is closed, the bottom end of the screen bag is open, the screen bag is arranged in the supporting framework, rings are arranged at positions on the top end of the screen bag, wherein the positions correspond to the vertex corners of the supporting framework, rings are also arranged at positions on the bottom end of the screen bag, wherein the positions correspond to the supporting rods, and both the top end and the bottom end of the screen bag are connected with the supporting framework through the hooks and the rings. The physical protector can prevent the common pests of a single piece of Chinese cabbage before harvesting, and also can be used as a package for a single piece of harvested Chinese cabbage.

The invention discloses a breeding method of a novel group PLR germplasm of corn. The method comprises the steps of selecting well-performing hybrids from temperate production, namely hybrid F1-F2 generation germplasms in the modes of Reid*PB group and Reid*Lan., respectively breeding selfing lines and measuring combining ability; and constructing the PLR group germplasm by utilizing the R / P and R / L selfing lines with high combining ability and complementary agronomic traits. The method has the beneficial effects that the early generation selection and the S3-S4 generation haploid breeding areadopted; according to the method, the plant type, the resistance, the panicle traits and the like are strictly selected in flowering and harvesting periods and a batch of excellent selfing lines arebred; barren ear tips are reduced; the resistance, the combining ability, the tip sealing property, the seed-producing rate, the dehydration property and the adaptability are increased; and the prepared hybrids can meet the production requirements.

The invention provides a four-change-one-increase high efficiency cultivation method for fresh eating sweet potatoes in plains of the China northern potato region. The method comprises the following steps that an excellent variety is selected; health seedlings are selected; ridging, pipe layering and film overlaying are carried out; close planting is carried out earlier appropriately; water and fertilizers are managed accurately; appropriate chemical control is implemented; vine removing and harvesting are carried out mechanically; and early harvesting and grading are carried out in proper time. In the cultivation method, drip irrigation is used according to needs of scaled household farms, the wheelspan of a power machine matching mechanical traction is taken into full consideration, a single-ridge-single-row manner is changed to a large-ridge-double-row manner, rely on natural rainfall is changed to accurate water supply, fertilizer broadcasting is changed into quantitative fertilizer supply, excessive chemical control is changed into staged green chemical control, and the sweet potato plantation density is increased; thus, the survival rate in the seedling stage and the rate ofcommercial potatoes are improved, the climate risk in sweet potato production is reduced, the high efficiency cultivation method with the core of four-change-one-increase for the fresh eating sweet potatoes is formed on the basis of integration of water and fertilizer drip irrigation, and production of the fresh eating sweet potatoes enters a mechanical, facility, engineering and simplified stage.