分次施氮对水稻根际土壤微生物生态效应的影响  

Ecological Effect of Nitrogen Fertilizer with Split Application on Rice Rhizosphere Microbes in Paddy Field

作　　者：汪华[1] 杨京平[1] 徐伟[1] 马维娜[1] 

机构地区：[1]浙江大学生命科学学院生态研究所,浙江杭州310029

出　　处：《水土保持学报》2006年第4期123-126,共4页Journal of Soil and Water Conservation

基　　金：国家自然科学基金资助项目(60274052;60574046)

摘　　要：研究了分次施氮条件,施氮对水稻根际土壤微生物生态效应的影响,结果表明:水稻根际土壤微生物生态效应不仅仅受到根际土壤微生物的影响,同时也受到水稻生长状态的影响。一般来说,水稻生长旺盛的时候,水稻根系与根际土壤微生物竞争营养元素,导致水稻根际微生物活性的下降。在水稻生长周期内,水稻根际土壤微生物生物量C与根际土壤酶等变化不一致。分次施氮条件下,施氮对根际微生物生物量C、磷酸酶、脲酶、总蛋白和总酚有一定的影响,尤其是在水稻生长的后期,4次施氮全部完成后,施氮与不施氮表现出明显的差异。The ecological effect of nitrogen fertilizer with split application on rice rhizosphere microbes was conducted in paddy field of Fuyang, Zhejiang province, China in 2005. The research rest, lts indicated that the ecological effect of nitrogen on rice rhizosphere microbes is not only affected by rice rhizosphere microbes population but also affected by the growth of the rice. In general, there is a competition on nutrition between the rice and the rice rhizosphere microbes in the rice tillering stage and filling stage. As a result, the activity of rice rhizosphere mi- crobes descends. The microbial biomass C content in rice rhizosphere changed as the rice grows,which differ from enzyme in the rhizosphere. The microbial biomass C, phosphatase, urease, total protein, total phenol content in rice rhizosphere are affected by split N fertilizer application. There is an obvious difference with N and without N treatment in the latest rice growth periods after fulfillment the N fertilizer.

关 键 词：氮素 水稻根际 微生物 生态效应 

分 类 号：S154.34[农业科学—土壤学] S511[农业科学—农业基础科学]