闽南尾巨桉人工林叶片营养的DRIS诊断

摘要

Using nutrition diagnosis with DRIS,the nutrition balance of leaves was studied in Eucalyptus urophylla × E.grandis plantations in Southern Fujian.The results were as follows:the optimum ratio range of P content to N content in the leaves of E.urophylla × E.grandis plantations was from 0.0975 to 0.1313,the optimum ratio of N content to K content was from 0.7742 to 1.1736,the optimum ratio range of P content to K content was from 0.0901 to 0.1247.Nutrition balance was poor in E.urophylla × E.grandis plantations in Southern Fujian.There was a greater demand for N in E.urophylla × E.grandis plantations,followed by P,with less demand for K.%利用DRIS营养诊断法对闽南尾巨桉人工林叶片的营养平衡状态进行了分析,结果表明:闽南尾巨桉人工林叶片PN含量最适比值为0.0975-0.1313,NK含量最适比值为0.7742-1.1736,PK含量最适比值为0.0901-0.1247.闽南尾巨桉人工林的营养平衡状态较差,N需求量最大,P需求量次之,K的需求量最小.