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针对目前大豆生产中的倒伏问题,本文通过设定低钾、中钾、高钾3个钾肥施用量,开展了钾调控对大豆植株地上部茎秆抗倒性能影响的研究。结果表明:通过钾调控提高了植株茎秆的抗倒能力。具体表现为,施用钾肥使茎秆基部1到5节节间长度缩短、节间粗增大、并降低了最大节间粗所在的节位。与未施用钾肥比较,钾调控使植株重心高度降低、基部各茎节节间鲜重和单位茎长鲜物质重增加,同时,明显提高了茎秆各节位的压碎强度,增强了茎秆的抗折能力,提高了地上部植株的抗倒伏能力。不同钾肥处理下倒伏发生级数为:低钾>高钾>中钾。
In view of the current lodging problem in soybean production, this paper studies the effects of potassium control on stem lodging resistance of soybean shoots by setting the application rates of three potassium fertilizers, ie low potassium, medium potassium and high potassium. The results showed that the ability of stems to stand up was improved by potassium control. In particular, the application of potash reduced the length of internodes from 1 to 5 at the base of the stalk, shortening the internode, and reducing the node where the largest internode was located. Compared with the non-application of potassium fertilizer, potassium decreased the height of the plant center of gravity, increased the fresh weight of fresh stems and stems, increased the crush strength of stems and increased the stems The ability to resist lodging and the lodging resistance of above-ground plants are improved. Under different potash treatments, the order of occurrence was: low potassium> high potassium> middle potassium.