短期中水灌溉对绿地土壤微生物数量的影响

Effects of short-term irrigation with reclaimed water on soil microbial quantity of greenbelt

采用室内土柱模拟试验的方法,研究了中水灌溉下6种绿地植物根际土壤微生物数量的季节动态变化。结果表明,与清水灌溉相比,中水灌溉下土壤细菌、放线菌和真菌数量分布有增加的趋势;土壤微生物数量呈单峰曲线变化(5-11月),6种植物最大值均出现在7、8月;不同植物种对根际土壤微生物的增减变化有一定的影响,可能与植物具体的生物学特性有关。

The simulation experiment with soil column was carried out to determine the effects of short-term irrigation with reclaimed water on seasonal dynamic changes of microbial population in the root soil layer of greenbelt.The results of this study showed that the short-term irrigation with reclaimed water increased the quantity of bacteria,fungus,actinomycete in soil when compared to clean water.The change of soil microbial quantity showed a single peak curve from May to November,and peaked in July or August.The differently changeable trends of soil microbial quantity were found in this study among six plants,which was possibly related to the biological characteristics of plants.