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水稻生长中后期,根系吸收功能日渐衰退,而穗部尚处在营养充实阶段,需要足够的养分供应。如通过根外喷施叶面肥的方法补充养分,让水稻茎叶直接吸收利用,用肥少、见效快。叶面肥的种类及在水稻上的施用方法如下: 1.氮肥 高产水稻要求早发、中稳、后不衰,生长后期缺氮则叶片发黄,结实率降低。在孕穗期和灌浆期各喷1次1％的尿素与3000倍的802混合溶液,可延长功能叶寿命,
In the middle and later stages of rice growth, the root absorption function gradually declined, while the ear is still in the stage of nutrient enrichment, adequate nutrient supply. Such as foliar fertilization through the root method of spraying nutrients, so that direct absorption of rice stems and leaves use, with less fat, quick. The types of foliar fertilizer and the application methods on rice are as follows: 1. Nitrogenous high yielding rice requires early onset, medium stable and last not bad, late growth late nitrogen leaves yellow, reduced seed setting rate. In the booting stage and the filling of each spraying 1% urea and 3000 times the 802 mixed solution can extend the functional leaf life,