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机构地区:[1]扬州市江都区农业技术推广中心,江苏扬州 [2]扬州市耕地质量保护站,江苏扬州
出 处:《农业科学》2018年第10期1200-1206,共7页Hans Journal of Agricultural Sciences
基 金:全国测土配方施肥补贴项目(2012~2015年);江苏省农业三新工程项目(sxgc[2017]158).
摘 要:为解决本地区油菜氮肥适宜用量及提高氮肥利用率的问题,2014~2016年度连续3年在磷、钾和硼肥的等量施肥下以氮肥不同用量为试验材料进行田间试验,研究氮肥不同施用量对油菜籽产量、氮肥利用率及土壤养分的影响。结果表明,合理施用氮肥对油菜株高、茎粗、分枝数、单株角果数、每角粒数和千粒重均有促进作用,同时能显著提高油菜籽的产量;油菜氮肥利用率和氮肥偏生产力随氮肥用量的增加而下降;增加氮肥施用量,可提高土壤有效磷、全氮、有机质含量;初步确定了本区域种植冬油菜氮肥推荐量为196.87 kg/hm2。In order to solve the problem of the application amount of N and Increase N fertilizer utilization in winter rapeseed in the region, based on the same dose of K, P and B fertilizers with N different dose in 2014-2016 years, the influence on rape seed yield, N fertilizer utilization and soil nutrition con-tent was studied with N different. The results showed that the rational N fertilizers could increase the plant height, stem diameter, branch number, single plant kernels, per kernels number and 1000-grain weight of rapeseed, and increase obviously yield of rapeseed. The N fertilizer utilization and N partial factor productivity decreased with the increase of nitrogen fertilizer. The content of available phosphorus, total nitrogen and organic matter in soil can be increased by increasing the amount of nitrogen fertilizer applied. The optical recommendation of N fertilizers was determined to be 196.87 kg/hm2.
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