氮肥减量缓释对夏玉米农艺指标、产量性状及氮肥利用效率的影响
Journal of Henan Institute of Science and Technology(Natural Sciences Edition)(2018)
Abstract
以普通氮肥为对照,研究了氮肥减量缓释对夏玉米驻玉216农艺指标、产量性状及氮肥利用效率的影响.结果表明:与同量普通氮肥(T2处理)相比,缓释氮肥减量10%、20%时株高增加1.22%~3.32%,穗位高增加6.67%~10.56%,茎粗增加10.27%~15.14%,基部茎节间长度增加4.55%~10.23%,地上总干物质量增加1.26%~7.66%,氮素营养总量提高6.89%~12.70%.氮肥减量缓释对玉米产量构成因素无明显影响,但提高了氮肥表观利用效率、氮肥农学效率;减量过度(30%,T6处理)会显著降低玉米地上干物质的积累和氮素营养含量.
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