摘要
近年来,勉县直播油菜得到了突飞猛进的发展,面积已占全县油菜种植面积的80％以上.为准确掌握直播油菜的需肥规律和精准施肥,勉县农业技术推广中心开展了直播油菜肥料利用率试验,通过试验测算得知:勉县直播油菜在推广氮磷钾配方施肥技术的前提下,每生产100 kg油菜籽需要吸收纯氮、五氧化二磷、氧化钾分别是5.02 kg、2.57 kg、6.22 kg;氮肥利用率46.5％、磷肥利用率18.9％、钾肥利用率53.1％.
Abstract
In recent years,the direct-seeded rapeseed cultivation has developed rapidly in Mianxian County,with over 80％of rapeseed planting in the county adopting direct seeding.To precisely understand fertilizer demand patterns and implement precise fertilization for direct-seeded rapeseed,an experiment on fertilizer utilization rates was conducted by Mianxian Agricultural Technology Extension Center during direct-seeded rapeseed production.After calculation,in the context of promoting nitrogen,phosphorus,and potassium formula fertilization technology in Mian County,the required uptake of pure nitrogen,phosphorus pentoxide,and potassium oxide for every 100kg of rapeseed is 5.02kg,2.57kg,and 6.22kg,respectively.The utilization rates are 46.5％for nitrogen,18.9％for phosphorus,and 53.1％for potassium fertilizers.
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