杨树人工林连栽对土壤生物学性质的影响

Effects of Continuously Planting on Soil Biological Characteristics of Populus L. Plantation

摘要:

采用空间代替时间的方法,研究了连栽对江汉平原杨树人工林土壤生物学性质的影响。笔者通过结果表明:与第1代林相比,第2代林土壤真菌、放线菌、细菌的数量分别下降34.38%、14.38%、56.63%,土壤微生物总量下降56.05%。连栽导致土壤磷酸酶活性下降20.00%,脲酶活性下降11.54%,蔗糖酶活性下降29.39%,蛋白酶活性下降50.00%,过氧化氢酶活性下降1.92%,而多酚氧化酶活性增加100.00%。方差分析结果表明,不同栽植代数间,土壤细菌数量、微生物总量、蛋白酶活性差异达到显著性水平。

Abstract:

The effects of continuously planting on soil biological characteristics of Populus L.plantation were studied in Jianghan plain by using space for time method.Comparing to first generation forest,The result showed that the second generation forest quantities of fungi,actinomycial,bacteria and the total microbe numbers decreased by 34.38%,14.38% 56.63% and 56.05% respectively;and the activities of soil phosphataese,urease,sucrase,protease,catalase decreased by 20.00%,11.54%,29.39%,50.00%,1.92% respectivly,whi...