影响巨桉人工林生长的主要土壤因子

A Study on Important Soil Factors Affecting the Growth of E Grandis Hill ex Maid Plantation

选用２４块巨桉标准地的土壤分析资料，采用逐步回归方法，探讨影响巨桉生长的主导土壤因子．结果表明：制约巨桉人工林生长的主导因子为土壤田间持水量、有效锌、有效铁及有效磷，其回归方程为：Ｙ＝－１．９２３＋０．２６８ｘ４－０．３６３ｘ１５＋０．０４５ｘ１６＋０．１４３ｘ１０．为提高巨桉人工林生长力、培育速生丰产林，选择适宜的立地，调控土壤田间持水量、有效磷。

Selecting soil analyzing data of 24 sampling plots of E Grandis Hill ex Maid, this paper probes into the main soil factors affecting the growth of E Grandis Hill ex Maid using stepwise regression method The results show that the main soil factors limiting the growth of E Grandis Hill ex Maid are field capacity, available Zn, available Fe and available P, its regression equation is:Y=1 923+0 268x 4-0 363x 15 +0 045x 16 + 0 143x 10 To select suitable site and to adjust the field capacity, the level of available Zn, available Fe and available P may be the important way for further increment of E Grandis Hill ex Maid forest productivity