Guiding Opinions on Scientific Fertilization Technology in the Cold Spring Corn Region of Northeast China in Spring 2015
Northeast cold spring corn area (most of Heilongjiang and eastern Jilin Province)
Fertilization principle
(1) According to the soil fertilization results, determine the reasonable amount of nitrogen, phosphorus and potassium fertilizer.
(2) Nitrogen application in divided applications, and high-yield fields should increase the proportion of potassium fertilizer application.
(3) According to the climate and soil fertility conditions, the combination of agricultural machinery and agronomy will increase the application of a small amount of diammonium phosphate as a seed fertilizer in the spring.
(4) Increase the application of organic fertilizer, promote the cooperation of organic and inorganic fertilizers, and increase the strength of straw returning to the field.
(5) Pay attention to the application of trace elements in sulfur and zinc, and acidify the soil to increase the application of alkaline fertilizer.
(6) Fertilizer application combined with high-yield and high-quality cultivation techniques. 2. Fertilization advice
(1) Recommended 14-18-13 (N-P2O5-K2O) or similar formula. (2) The production level is 500~600 kg/mu, the recommended dosage of formula fertilizer is 23~28 kg/mu, and the seven-leaf stage is followed by urea 11~13 kg/mu.
(3) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 28~32 kg/mu, and the urea in the seven-leaf stage is 13~16 kg/mu.
(4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 32~37 kg/mu, and the application of urea in the seven-leaf stage is 16~18 kg/mu.
(5) The production level is below 500 kg/mu, the recommended dosage of formula fertilizer is 18~23 kg/mu, and the application rate of urea in the seven-leaf stage is 9~11 kg/mu.
This article URL: Guiding Opinions on Scientific Fertilization Technology in Northeast Spring Cold Spring Corn Region in Spring 2015
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