闽南尾巨桉人工林叶片营养的DRIS诊断

Nutrient diagnosis for Eucalyptus urophylla×E.grandis plantations in Southern Fujian using DRIS diagrammatizing method

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.

Using nutrition diagnosis with DRIS, the nutrition balance of leaves was studied in Eucalyptus urophylla × E. grandisplantations in Southern Fujian. The results were as follows ： the optimum ratio range of P content to N content in the leaves of E. uro- phylla × 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. gran- dis 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.