限制人工杉木林生长的土壤因子

福建省来舟林业试验场３６个固定标准地的杉木林分生长与林下土壤的调查分析结果显示，制约传统模式培育的杉木林的生长的主要土壤因子是土壤原有全氮、速效磷、土层厚度和腐殖质层厚度．其中土壤氮磷属较易人工控制因子，为进一步提高人工杉木林生产力，调节土壤氮磷水平可能为其重要途径之一．

Soil Factors Limiting the Growth of Chinese Fir Plantation

The results of measurement and analysis of 36 sampling plots of Chinese fir stands and soils in Laizhou Forestry Experimental Centre in Nanping,Fujian,within the central producing area of Chinese fir in Southern China, showed that the original amounts of total nitrogen,available phosphorus supply,soil depth (A+AB+B) and humus horizon's depth (A+AB,the visible depth of humus dying) were the important soil factors in limiting the growth of man-made Chinese fir forests planted under traditional aforestation pattern. with the easier control of soil nitrogen and phosphorus considered, to adjust the levels of nitrogen and phosphorus might be one of important way for further increment of Chinese fir forest productivity.