雷竹林地覆盖增温过程中土壤酶活性的动态变化

雷竹（ＰｈｙｌｌｏｓｔａｃｈｙｓｐｒａｅｃｏｘＣ．Ｄ．Ｃｈｕ．ｅｔＣ．Ｓ．Ｃｈａｏ）是优良的笋用竹种。目前，生产上栽种面积不断扩大，许多竹林地采用冬季覆盖技术使出笋时间大大提前［１，２］，从而给广大农户带来了可观的经济收入。但是，随着连年覆盖竹林出现了退化现象，包括竹鞭提前死亡，竹子开花增多，病虫害严重等［３］。这些不良结果与覆盖材料给土壤带来的影响是否有一定的关连呢？有机物料覆盖增温及分解对土壤的影响，最直接反映在土壤的生物学性质上，土壤酶又是生物学性质的主要内容。为此，本文分析了不同覆盖材料…

Dynamic Change of Enzyme Activities of Soil under Phyllostachys praecox during Covering Organic Material

In winter time, phyllostachys praecox forest were covered with different organic material,several enzyme activities were tested regularly. It is concluded that enzyme activities of soil covered with bamboo leaves are rising with the day. At the end of experiment (on the Day 100) the activities of hydrogen peroxidase,sucrase,phosphatese,urease,protease are respectively 3.24,2.08,2.01,1.48,2.40 times as that of the original. Soil covered with rice straw or rice straw plus rice chaff,enzyme activities of hydrogen peroxidase,sucrase,phosphatese are growing until Day 75,but down afterwards till the end of experiment. As to urease and protease,there is almost no change in activities except a little down during the later experiment period.