Semi-arid spring maize area in the northeast (west of Jilin Province, northeast of Inner Mongolia Autonomous Region, southwest of Heilongjiang Province) Fertilization principle (1) Using organic-inorganic fertilizer combined with fertilization technology, the aeolian sandy soil can be covered with straw and no-tillage fertilization technology. (2) Deep application of nitrogen fertilizer, the depth of fertilization should reach 8~10 cm; the fertilization should be applied in several stages, and the nitrogen fertilizer should be applied in the big horn period. (3) Give full play to the coupling of water and fertilizer, use the synchronous law of maximum efficiency of corn for water and fertilizer demand, and apply nitrogen fertilizer combined with irrigation. (4) Master the principle of balanced fertilization, coordinate the supply of nitrogen, phosphorus and potassium, and pay attention to the use of zinc fertilizer in zinc-deficient plots. (5) According to the soil characteristics of the region, physiological acid fertilizer should be used, and monoammonium phosphate should be used as the seed fertilizer. (6) The lower limit of the recommended amount of fertilization scheme for medium and high fertility soil. 2. Fertilization advice (1) Recommended 13-20-12 (N-P2O5-K2O) or similar formula. (2) The production level is 450~600 kg/mu, the recommended dosage of formula fertilizer is 25~33 kg/mu, and the large flare period is 10~14 kg/mu. (3) The production level is 600~700 kg/mu, the recommended dosage of formula fertilizer is 33~38 kg/mu, and the large flare period is about 14~16 kg/mu. (4) The production level is above 700 kg/mu, the recommended dosage of formula fertilizer is 38~44 kg/mu, and the large flare period is about 16~18 kg/mu. (5) The production level is below 450 kg/mu, the recommended dosage of formula fertilizer is 19~25 kg/mu, and the large flare period is about 8~10 kg/mu. This article URL: Guiding Opinions on Scientific Fertilization Technology in the Semi-arid Spring Maize Region in Spring of 2015
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