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利用菜用大豆品种(系)中科毛豆1号和品系121,在正常氮磷种肥用量基础上,进行不施钾(K0),种肥施钾120 kg·hm~(-2)(K1),种肥施钾120 kg·hm~(-2)+叶面喷施钾肥(K2)3种施钾处理,探究菜用大豆开花后28~56 d内茎秆、叶片、叶柄、荚皮、籽粒中钾素积累动态。结果表明:相同时期不同部位钾素积累均为K2>K1>K0,各部位钾的相对积累量为籽粒>荚皮>叶片>叶柄>茎。同时发现,菜用大豆茎秆、叶片、叶柄、荚皮中钾积累量均随着生育进程逐渐下降,而籽粒中钾素的积累在开花后28~42 d下降,42~49 d升高,随后略有降低。施用钾肥增加了菜用大豆植株各部位的钾积累量,施钾叶面肥可进一步增加钾积累量。
Based on the amount of normal nitrogen and phosphorus fertilizers, using the vegetable soybean varieties (lines) Zhongmaoyu No.1 and line 121, K (K0), 120 kg · hm -2 (K1 ), Potassium application rate of 120 kg · hm -2 and potassium application rate of foliar application of potassium fertilizer on the growth of stem, leaf, petiole, K accumulation in grains. The results showed that the accumulation of potassium in different parts of the same period was K2> K1> K0, and the relative accumulation of potassium in different parts was in the order of grain>> peel> leaf> petiole> stem. At the same time, it was found that the accumulation of potassium in stalk, leaf, petiole and pod skin of vegetable soybean decreased with the growth of plant, but the accumulation of potassium in grain decreased from 28 to 42 d after flowering and increased from 42 to 49 d, Then slightly lower. Potassium application increased the accumulation of potassium in all parts of vegetable soybean plants, and the application of potassium foliar fertilizer could further increase the accumulation of potassium.