文档介绍：不同用量长效控释肥对夏玉米生长发育及产量的影响
摘要:试验通过长效控释肥在夏玉米播种时一次性基施,探讨了不同用量的长效控释肥对玉米生长发育、产量、经济效益及环境的影响。结果表明:与农民习惯施肥( kg/hm2高氮复合肥)相比,除60%控释肥处理略有减产外,其余控释肥处理均表现不同程度地增产,%~%,部分处理的产量差异达到显著水平。在本试验条件下,综合考虑玉米产量、氮素利用效率和经济效益,采用普通施肥量80%水平的控释肥一次施用,可以达到省工、高产、高效、节肥的目的,宜于在华北平原夏玉米生产区推广应用。
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关键词:长效控释肥;夏玉米;产量;氮肥利用率
中图分类号: 文献标识号:A 文章编号:1001-4942(2017)07-0095-04
Abstract Different rates of long-term controlled-release fertilizer (CRF) were applied once when sowing summer maize to explore their effects on maize growth, yield, economic profits and environment. The results showed pared with conv
entional fertilization (topdressing high-pound fertilizer of kg/hm2 for two times at seedling stage and bell stage respectively), except the treatment of 60% CRF with a little decrease of yield, the other treatments all showed increase in production in varying degrees with the range of %~%, and some showed significant differences. Comprehensively considering maize yield, nitrogen use rate and economic profit, the controlled-release fertilizer could be applied once at the amount of 80% mon fertilizer amount. It could realize laborsaving, high yield, high efficiency and fertilizer saving, and was beneficial for popularization in the summer maize production area in North Ch