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9204results about "Fertilising methods" patented technology

Sodium alginate oligosaccharide coated slow-release fertilizer and preparation and application thereof

The invention discloses a sodium alginate oligosaccharide coated slow-release fertilizer. Coated materials of the slow-release fertilizer contain sodium alginate oligosaccharide and an auxiliary coated material, wherein sodium alginate oligosaccharide is composed of two structural units, namely a-L-mannuronic acid and b-D-guluronic acid. The two structural units are linked in three ways by 1,4-glucosidic bond, so as to form a unbranched linear segmented copolymer. The coated slow-release fertilizer is mainly applied in commercial crops, fruit and vegetable crops, grain crops, economic forest, flowers and plants, traditional Chinese medicinal materials, lawn and the like. By introducing organism-derived sodium alginate oligosaccharide into the coated materials of the slow-release fertilizer, nutritive elements required by plant growth and development can be supplemented by a slow-release approach, and the plant growth promoting effect of sodium alginate oligosaccharide also can be performed so as to finally achieve the yield-increasing effect. In addition, a medicament prepared by using sodium alginate oligosaccharide as the main coated material composition is safe and nontoxic and has advantages of low cost, small application amount and the like.

Environmentally friendly biochar-based fertilizer and application method thereof

The invention discloses an environmentally friendly biochar-based fertilizer and an application method thereof. The preparation of the biochar-based fertilizer comprises the following steps of: drying and crushing forestry and agricultural residues, then performing oxygen limited pyrolysis on the crushed materials for 1-5 hours at 300 to 700 DEG C, and sieving, thereby obtaining biochar; and after the biochar is fixed with persistent organic pollutant degrading bacteria, mixing the biochar with a fertilizer, stirring the two thoroughly, and adding a binder accounting for 1wt%-4wt% of the total weight, thus obtaining the environmentally friendly biochar-based fertilizer. For application, the prepared environmentally friendly biochar-based fertilizer is applied to soil by 100-1000 kg per hectare; the surface layer of soil, to which the biochar-based fertilizer is applied previously, is turned over by 0-20 cm, so that the biochar-based fertilizer is mixed with the soil thoroughly, and then the soil can be used for planting crops. The environmentally friendly biochar-based fertilizer provided by the invention overcomes the shortcoming that present biochar-based fertilizers contain organic pollutants such as polycyclic aromatic hydrocarbon, the influence of the fertilizer on soil and environment is alleviated, and the safety risk of agricultural products is reduced; moreover, the environmentally friendly biochar-based fertilizer has the advantages of simple and practicable preparation process, low cost and the like.

Method for producing and restoring vegetables growing in the heavy metal mildly-polluted soil

ActiveCN101116865AReduce the effective content of heavy metalsDoes not destroy physical and chemical propertiesContaminated soil reclamationFertilising methodsSedum alfrediiElsholtzia splendens
The invention relates to a technique of remediation of slightly and medio- metal-contaminated vegetable soil with production. The specific steps are as follows: firstly, Sedum alfredii and Elsholtzia splendens are intercropped in vegetable soil contaminated by heavy metal such as cadmium, copper and zinc in spring with a with inter plant distance of ten to fifteen centimeters, row spacing of thirty centimeters; secondly, the Sedum alfredii is harvested periodically, a growth period of Sedum alfredii is three to four months during a first harvest, from then on, the Sedum alfredii is harvested every three months or when growing to a height of thirty to forty centimeters, stems of a height of two to three centimeters are left above the ground in harvest; the Elsholtzia splendens is harvested in October; thirdly, a cadmium-enriched rape is planted after the harvest of the Elsholtzia splendens with the spacing in the row of fifteen to twenty centimeters and is harvested in April of the next year; fourthly, a cucumber is planted after the harvest of the rape with the spacing in the row of twenty to twenty-five centimeters, a cabbage is planted after the harvest of the cucumber in September, the Elsholtzia splendens is planted after the harvest of the cabbage, then a restoring period is completed. Adopting a super accumulator plant for absorbing a plurality of heavy metal from the soil, the invention achieves reducing the heavy metal content in the vegetables and guaranteeing the safety of the farm produce.

Planting method of Chinese trichosanthes

The invention relates to a planting method of Chinese trichosanthes, belonging to the technical field of plantation and comprising the steps of: variety breeding, seedling reproduction, transplanting, field management, disease and pest control, harvesting and processing, wherein the variety breeding step includes the sub-steps of the tests in different production places, amplification and verification tests, resistance test, field pest investigation and trichosanthes nematode control; the seedling reproduction step includes the sub-steps of seed reproduction and root reproduction; the transplanting step includes the sub-steps of land selection and preparation, ridging, reproduction and planting, planting method implementation and field management; the land selection and preparation step includes the sub-steps of detection on chemical characteristic of soil, basic fertilizer application and disinfection; the reproduction and planting step includes the sub-steps of seed bud selection, rood cutting and breeding, planting and shed putting up; the planting method implementation step includes the sub-steps of planning density control and staminiferous plant matching; the filed management step includes the sub-steps of intertillagement and weeding, top application, shed putting up, pruning and cold prevention, in particular to intertillagement and weeding, root airing, intercrop, earthing, vine supporting and racking, top application, pruning, flower and fruit protection, chemical control and foliage application; and the disease and pest control step includes the sub-steps of control of diseases and pest and control method implementation.

Method for tissue-culture breeding and wild-simulated cultivation of dendrobium candidum

The invention discloses a method for tissue-culture breeding and wild-simulated cultivation of dendrobium candidum, which comprises: inoculating dendrobium candidum tender straw slices onto a culturemedium for culture under conditions of a temperature of 22 to 24 DEG C and an illuminance of 1,000 to 1,500 Lx to first induce the growth of calles to form protocorms and then promote the multiplicative growth of the protocorms into 5 to 8 centimeter strong seedlings; and moving the seedlings out of a culture room, hardening the seedlings at a normal temperature for 3 to 5 days and transplanting the seedlings into the ground in a green house. The plane basic layer of a cultivation check field in the green house are provided with spaced breather holes; the upper layer of the cultivation check field is a cultivation medium; the seedlings are planted at a row spacing of 12*8cm and a spacing in the row of 12*8cm; in the green house, the temperature is 0 to 28 DEG C, the humidity is 60 to 70 percent and the shade density is 70 to 80 percent; and disease and pest prevention and control are carried out periodically and the dendrobium candidum can be harvested in 3 to 4 years. The method improves the civil year breeding coefficient of the dendrobium candidum by about 10 times, provides enough seedlings for large-scale cultivation, solves the problem of wild-simulated cultivation and realizes scale cultivation.
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