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测定12个品种大豆叶片全氮含量(％)表明:各节位叶片全氮含量总平均值为4.51％。从初生叶到11—12节位叶片随节位上升,全氮含量逐渐增加。5—6、7—8、9—10节位叶片全氮含量与总平均值呈显著正相关。早熟品种植株12节位以下叶片的各节位叶片全氮含量的平均值高于晚熟品种。
Determination of 12 varieties of soybean leaf total nitrogen content (%) shows that: the total leaf nitrogen content of each node average of 4.51%. From the first leaf to the 11-12 leaf position with the node up, total nitrogen content increased. The content of total nitrogen in 5-6, 7-8 and 9-10 leaf segments had a significant positive correlation with the total average value. The average value of total nitrogen content of leaf segments under 12 nodes of precocious varieties was higher than that of late-maturing varieties.