In order to study the effect of compound fertilizer of different formulations applied on summer maize at one time,a field experiment was conducted to analyze maize yield and component factors,ear traits,nutrient accumulation,nutrient utilization efficiency and economic benefits by setting 6 formulation treatments (30-5-5,33-5-8,28-7-9,27-7-12,28-11-10,29-6-10). The results show that the average yield of maize under different formulas (28-7-9,27-7-12,28-11-10,29-6-10) reaches 10.5 t/hm2,the two high-nitrogen formulas (33-5-8 and 30-5-5) have lower yields,and the other high phosphorus and/or potassium formulas can increase yields by 6.3%-9.5% and 7.0%-10.2%. Compared with the two high-N formulas,the length of bare tip,the number of missing grains and the seed setting rate of maize increased for the formula with high-P/K. In terms of nutrient utilization indexes,the nutrient harvest index and internal efficiency of the high-N formula were lower than those of other treatments. The total and net returns of the high-P/K formula increased by 4.6%-6.9% and 6.1%-9.4% compared to the 30-5-5 formula,and by 9.3%-11.7% and 19.3%-23.4% compared to the 33-5-8 formula. Under the conditions of this study,the yield,nutrient utilization efficiency and economic benefit of the formula with reducing N,increasing P and K were better than the high-N formula.
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孙笑梅,武庆慧,李宏杰,黄玉芳,赵亚南,叶优良. Effects of one-off fertilization of formula fertilizer with reducing N while increasing P and K on maize yield and nutrient use efficiency[J]. Jorunal of Huazhong Agricultural University,2022,41(2):54-60.