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对油松、刺槐人工混交林和油松纯林的水土保持指标、生长状况、土壤因子、小气候因子的测试分析表明 ,混交林能有效改善土壤理化性质 ,提高土壤肥力 ,促进林木生长 ,增加经济效益。混交林比油松纯林林冠截留量提高 8.6 6 % ,饱和持水量增加 315.8% ,相对湿度提高2 .5% ,有机质含量提高 11.7% ,减轻容重 0 .2 g/cm3,林分病虫害明显减少。油松树高、胸径生长量分别提高 14.9%、2 2 .9%。
Soil and water conservation index, growth status, soil factors and microclimate factors of Pinus tabulaeformis, Robinia pseudoacacia mixed forest and Pinus tabulaeformis pure forest were tested and analyzed. The results showed that mixed forest can effectively improve soil physical and chemical properties, improve soil fertility, promote forest growth and increase economy benefit. The mixed canopy interception increased by 8.66%, the saturated water holding increased by 5.36%, the relative humidity increased by 2.5%, the organic matter content increased by 11.7% and the bulk density decreased by 0.2 g / cm3, the stand pests and diseases significantly decreased . Pine tree height, DBH growth increased by 14.9%, 22.9%.