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作 者 ：陈道东 李贻铨 徐清彦

期 刊 ：林业科学 1991年 27卷 1期 页码：1-7

关键词：杨树叶片养分；营养诊断；叶片养分临界值；营养模型；

Keywords:Poplar forliage nutrient, Nutrition diagnosis, Foliar nutrient critical valu, Nutrition model,

摘 要 ：为研究叶片最适养分状态,提出了模拟诊断方法。将砂姜黑土上Ⅰ-69杨(Populus deltoides Bartr.cv.“Lux”)的改土培肥试验各处理作为模拟诊断的样地。用典型相关分析方法选择采样时间、确定与林木生长有密切关系的叶片养分元素。用抛物线函数作为叶片最适养分状态的诊断函数。选择变量同时考虑叶片养分的含量和养分之间的比例。经过4年多的研究得出Ⅰ-69杨最适叶片养分状态为:造林第1年7月叶片含P₂O₅0.55—0.75%;造林后第2年7月叶片含N3.20—4.20%;造林后第3年5月含N3.00—3.70%;造林后第4年5月叶片中的N/K为1.00—1.60。

Abstract:The method of simulating diagnosis was derived for the research of foliar optimum nutrient status from the sample plots which were the treatments of experiment on amelioration and increasing fertility with Ⅰ-69 poplar (Populus deltorides Bartr. Cv. "Lux") on Sajong black soil. By canonical correlation analysis, sampling time was selected, and foliar mutriment elements closely related to forest tree growth were determined.Parabolic function was taken as the diagnosis function of optimum nutrient status in foliar. While selecting the variable of diagnosis function,content of foliar nutrient and the proportion of nutrients were considered. It was concluded that optimum foliar nutrient status for Ⅰ-69 poplar was as follows: The leaf content of P₂O₅ was 0.55—0.75% in July in the first year after plantation; N was 3.20—4.20% in the next year; N was 3.00—3;70% in May in the third year; N/K was 1.00—1.60 in the fourth year.

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