Guiding Opinions on Scientific Fertilization Technology for Spring and Corn Cultivation in Spring in the Spring of 2015

Northwest rain-fed and dry spring maize area (northern Hebei Province, northern Beijing, southern Inner Mongolia Autonomous Region, most of Shanxi Province, northern Shaanxi Province, northern Ningxia Hui Autonomous Region, eastern Gansu Province)

Fertilization principle

(1) Organic-inorganic fertilizers are combined, and organic fertilizers with high maturity and water content are preferred.

(2) Carry out the principle of deep application of fertilizer, the depth of fertilization should reach 10~20 cm, and the fertilizer should be applied to the surface before sowing.

(3) Master the principle of balanced fertilization, and pay attention to the use of zinc fertilizer in zinc-deficient plots.

(4) Fertilize according to the fertilization characteristics of spring corn, and advocate the application of nitrogen fertilizer during the big horn period.

2. Base chasing combined fertilization advice

(1) Recommended 15-20-10 (N-P2O5-K2O) or similar formula. (2) The production level is 450~600 kg/mu, the recommended dosage of formula fertilizer is 30~35 kg/mu, and the large flare period is about 12~16 kg/mu.

(3) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 35~40 kg/mu, and the large flare period is about 16~19 kg/mu.

(4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 40~45 kg/mu, and the urea is applied at 19~22 kg/mu.

(5) The production level is below 450 kg/mu, the recommended dosage of formula fertilizer is 20~25 kg/mu, and the large flare period is about 10~12 kg/mu.

3. One-time fertilization advice

(1) Recommended 26-13-6 (N-P2O5-K2O) or similar formula. (2) The production level is 450~600 kg/mu, and the recommended dosage of formula fertilizer is 45~50 kg/mu, which is used as a base fertilizer or seedling stage top dressing.

(3) The production level is 600~700 kg/mu, and there can be 20%~40% release-release nitrogen fertilizer with 50~60 days release period. The recommended dosage of formula fertilizer is 50~55 kg/mu, which is used as base fertilizer or seedling stage. Sexual administration.

(4) The production level is above 700 kg/mu, and there may be 20%~40% release period of 50~60 days of controlled release nitrogen. The recommended dosage of formula fertilizer is 55~60 kg/mu, which is used as base fertilizer or seedling stage. Sexual administration.

(5) The production level is below 450 kg/mu, and the recommended dosage of formula fertilizer is 30~40 kg/mu, which is used as a base fertilizer or seedling stage top dressing.

This article URL: Guiding Opinions on Scientific Fertilization Technology in the Spring and Yellow Rivers in the Spring of 2015

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