Principles of Fertilization
1. Use organic fertilizer in combination with inorganic fertilizer. The application of organic fertilizer in dry land can increase the nutrient supply of the soil and improve the physical and chemical properties of the soil. However, the nutrient content of organic fertilizer is low and the fertilizer supply capacity is weak. Therefore, it is necessary to increase the application of quick-acting chemical fertilizers to ensure nutrient supply and expand the circulation basis of organic matter. Rapidly improve soil fertility and increase production.
2. Combined application of nitrogen and phosphate fertilizers. The dry land and thin fields are deficient in phosphorus. Generally, the effect of phosphate fertilizer application is greater than that of nitrogen fertilizer application, and the combined application of nitrogen and phosphate fertilizer has a significant interaction effect. The ratio of nitrogen to phosphorus is generally 1:1. For example, in terms of urea and superphosphate, for every kilogram of urea, 4 kilograms of superphosphate should be used in conjunction.
Fertilization technology
1. Use the "one bombardment" method of fertilization. Dryland wheat has poor topdressing effect due to the lack of water irrigating conditions. All fertilizers, including organic fertilizers, nitrogen fertilizers, phosphate fertilizers, potash fertilizers, etc. can be applied as a base fertilizer at one time when plowing the land, and the depth of fertilizer application is generally controlled at about 30 cm.
2. Reserve fertilization. In dry land low-yield wheat fields, dry land with thick soil layers all the year round will increase the yield of wheat with the increase of fertilization rate within a larger range of fertilization. Therefore, in order to improve the soil fertility, the fertilizer applied should not only meet the growth needs of the wheat in the current season, but also make the soil nutrients surplus; newly reclaimed dry and thin land should use as much fertilizer as possible, especially phosphate fertilizer, and then appropriately reduce it after the soil fertility is improved. To reduce costs.
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Plant extracts refer to substances extracted or processed from plants (all or a part of plants) using appropriate solvents or methods, and can be used in the pharmaceutical industry, food industry, daily chemical industry and other industries.
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