“292”菜用大豆干物质与其氮磷钾含量的动态研究
Study on Dynamics of Dry Matter and Content of Nitrogen,Phosphorous and Potassium on Vegetable Soybean 292
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摘要: 对菜用大豆品种“292”分别于二复叶期、始花期、结英期、采青期的植株进行化验分析的结果表明:(1)结荚至采青期为于物质积累最快时期,占总积累量的43.98%,始花至结荚为日增重最快阶段。(2)苗期至始花期氮、磷均以叶中含量最高,钾以茎中含量最高。采青期荚中氮、磷、钾含量最高。(3)不同器官中全氮、磷、钾含量存在较大差异,氮含量叶>花荚>茎、磷含量花荚>叶>茎、全钾含量茎>叶>花荚。(4)每100kg青英需N1.73kg,P2O50.19kg,K2O 0.94kg,氮、磷、钾比例为1:0.11:0.54.Abstract: Analysis on plant of vegetable soybean variety 292 were carrled out at two compound leaves,flower-beginning, pod-setting and pod-picking stages, respectively. The results showed that: (1) The dry matter accumulated the most quickly durhg the period from pod-setting to pod-picking and accounted for 43.98% of the total accumulated amoun. The daily gain was the most quickly from flower-beginning to pod setting stages. (2) The content of nitrogen and phosphorous were the highest in leaves at the stage fron、seedling to flower-beginning. The content of potassium was the highest in stems. The content of nitrogen, phosphorous and potassium were the highest in pods.(3) The content of nitrogen, phos-phorous and potassium varied greatly with different organs. The content of nitrogen was leaf flower and podstem; The content of phosphorous was flower and podleaf. stem. The content of potassium was stem leaf flower and pod. (4) To produce 100kg fresh pods,1.73kg nitrogen,0.19kg P2O5 and 0.94kg K2O were needed, with the ratio of N:P:K 1:0.11:0.54
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