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本文通过对不同连栽代数的杉木林地土壤生化特性及化学性状的系统研究,探讨土壤酶活性及土壤化学性状随着杉木连栽代数的增加变化趋势;土壤酶活性与土壤养分含量之间的相关性。 土壤的营养元素含量随着连栽代数的增加,表现出明显的下降趋势,二代比一代下降了10—20％,三代比一代下降40—50％,尤其以有机质最为显著;土壤生化活性除个别酶外,大多数酶活性表现为一代>二代,一代>三代,二代比一代下降5—10％,三代比一代下降40—50％,显示出连栽后地力下降和生化性降低的趋势。
In this paper, we systematically studied soil biochemical characteristics and chemical characters of Cunninghamia lanceolata plantations with different continuous planting alluvial soils, and discussed the relationship between soil enzymatic activities and soil chemical properties with the increase of continuous planting alluvial of Cunninghamia lanceolata. The correlation between soil enzyme activities and soil nutrient contents Sex. The content of nutrients in soil showed a declining trend with the increase of continuous planting alluviation. The second generation decreased by 10-20% from the first generation and the third generation decreased by 40-50% from the first generation, especially the organic matter. The biochemical activity of soil The enzyme activities of most of the isozymes showed that one generation> two generations, one generation> three generations, the second generation decreased by 5-10% from the first generation, the third generation decreased by 40-50% from the first generation, showing decreased soil fertility and biochemical reduction after continuous planting trend.