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1982～1984年在大田条件下研究了钾素对冬小麦氮代谢与籽粒产量的影响。结果表明,一方面钾的增产作用只有在一定的氮素水平下才能得到发挥。从对植株氮钾最大积累量与麦粒产量间的通径分析,证明了钾的增产作用在很大程度上与氮代谢有关;而对产量与产量构成因子间的回归分析,则揭示出钾的增产实质是由于施钾提高了千粒重和麦穗数。另一方面,试验结果说明钾对小麦的氮吸收、转运和利用之影响因施氮水平而异。高氮缺钾,蛋白质合成及含氮化合物的转运受阻,氮代谢失调。此外,作者讨论了不同氮素水平下施钾效果不同的原因及钾素增产的机制,提出用植株氮/钾浓度比作为小麦钾素营养诊断的指标。文末还对浙江省小麦生产上钾肥的意义与合理施钾的方法等问题阐述了自己的认识。
The effects of potassium on nitrogen metabolism and grain yield of winter wheat under field conditions from 1982 to 1984 were studied. The results showed that on the one hand, potassium production can only be achieved under a certain nitrogen level. From the analysis of the maximum accumulation of nitrogen and potassium in plants and wheat grain yield, it was proved that the increase of potassium production was largely related to the nitrogen metabolism; while the regression analysis of yield and yield components revealed that potassium The substantial increase in production is due to the application of potassium to increase grain weight and number of ears. On the other hand, the results of the experiment showed that the effect of K on the nitrogen uptake, transport and utilization of wheat varied with the level of nitrogen application. Nitrogen deficiency potassium, protein synthesis and transport of nitrogen-containing compounds blocked, nitrogen metabolism disorders. In addition, the authors discussed the reasons for the different effects of potassium fertilization and the mechanism of potassium production increase at different nitrogen levels. The nitrogen / potassium concentration ratio of plant was taken as the index for the diagnosis of potassium nutrition in wheat. At the end of this article, we also expounded our own understanding on the significance of potassium fertilizer in wheat production in Zhejiang Province and the method of applying potassium fertilizer rationally.