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为了了解目前雷竹林地土壤酶活性状况 ,作者在 1 999年春季采样分析了浙江省临安市郊 4个乡镇 2 3个雷竹户的竹林土壤。结果表明 :雷竹地土壤酶活性变异较大 ,2 3块竹林土壤过氧化氢酶、蔗糖酶、磷酸酶、脲酶和蛋白酶活性的变异系数分别达到了 33 37% ,71 0 0 % ,49 60 % ,39 90 %和 2 8 0 8%。蛋白酶活性与土壤有机质、水解氮、有效磷、速效钾、蔗糖酶和脲酶的相关系数分别为 0 80 1 ,0 962 ,0 783,0 490 ,0 441和 0 845,说明蛋白酶是较理想的肥力指标。土壤磷酸酶活性与土壤有效磷的相关系数为 - 0 875,说明雷竹地磷肥用量过多。除磷酸酶外 ,土壤各类酶活性和雷竹开花率和煤污病感病指数均呈负相关 ,过氧化氢酶和蔗糖酶与竹子开花率负相关性达极显著水平。土壤生物学性质特别是过氧化氢酶和蔗糖酶活性可作为竹林退化指标。表 6参 7
In order to know the status of soil enzyme activities in the forest of Lei bamboo, the author sampled and analyzed the bamboo forest soil of 23 Lei Zhu households in 4 towns and villages in the suburbs of Lin’an City in Zhejiang Province in the spring of 1999. The results showed that the variation of soil enzyme activity in thunderstorm bamboo was large, the coefficient of variation of catalase, sucrase, phosphatase, urease and protease activity in 23 bamboo soils reached 33 37%, 71 0%, 49 60 %, 39 90% and 28 0%. The correlation coefficients of protease activity with soil organic matter, hydrolyzed nitrogen, available phosphorus, available potassium, invertase and urease were 0 801, 0 962, 0 783, 0 490, 0 441 and 0 845, respectively, indicating that protease was the ideal fertility index. The correlation coefficient between soil phosphatase activity and soil available phosphorus was -0.875, indicating that the amount of phosphate fertilizer was too high. In addition to phosphatase, soil enzyme activity and flowering rate of Phyllostachys pubescens and susceptibility index of coal are negatively correlated, catalase and invertase and bamboo flowering rate was extremely significant level. Soil biological properties, especially catalase and invertase activity, can be used as indicators of bamboo degradation. Table 6 Reference 7