【摘要】 采用微区试验、淋溶试验和田间试验,研究了玉米专用复混肥硝态氮淋溶情况。结果表明:合理施用具有一定缓效性的复混肥能够减少硝态氮的淋失,显著降低40 cm以下土壤的硝态氮含量,提高氮素利用率。但是当复混肥用量为750 kg/hm2时,土壤下层的硝态氮含量明显增加。回归方程结果显示,该玉米专用复混肥施用量为562.3 kg/hm2时,玉米产量能达到最高。更多还原

【Abstract】 The nitrate leaching of compound fertilizer for maize special-purpose was studied by micro-plot,leaching and field experiment.The results showed that the nitrate leaching loss reduced,the content of nitrate below 40 cm soil layer decreased significantly,and the nitrogen use efficiency increased by rational application of slow compound fertilizer.The content of nitratein the subsoil increased,when the dosage was 750 kg/hm2.The regression equation indicated that the yield of maize was highest with compound fertilizer 562.3 kg/hm2.更多还原