褐飞虱胁迫对不同抗性水稻品种根际土壤酶活性和微生物含量的影响  

Soilmicrobe Quantities and Enzyme Activities in Rhizosphere of Different Rice Varieties Fed by Brown Planthoppers

作　　者：苏婷[1] 徐红星[2] 韩海亮[1] 杨亚军[2] 王桂跃[1] 郑许松[2] 吕仲贤[2] 

机构地区：[1]浙江省农业科学院浙江省东阳玉米研究所,浙江东阳322100 [2]浙江省农业科学院植物保护与微生物研究所,杭州310021

出　　处：《中国水稻科学》2014年第3期322-326,共5页Chinese Journal of Rice Science

基　　金：国家科技支撑计划资助项目(2012BAD19D03);浙江省优先主题重点农业项目(2011C12022)

摘　　要：为明确褐飞虱取食对不同抗性水稻地下部生态系统的影响,对褐飞虱取食不同天数后,感虫水稻品种(TN1)和抗虫水稻品种(IR26和IR36)根际土壤pH值、土壤酶活性和微生物含量进行分析。结果表明,褐飞虱取食1d和5d后,感虫品种TN1的土壤pH值显著降低,而抗虫品种上差异不显著;褐飞虱取食1d后,根际土壤蔗糖酶和脲酶活性均无明显差异,而在褐飞虱取食9d后,抗虫品种IR36根际土壤蔗糖酶活性显著上升,而脲酶活性显著降低;褐飞虱取食1d后IR36根际土壤细菌含量即显著降低,而感虫品种TN1在褐飞虱取食5d后其真菌含量显著降低,褐飞虱取食9d后,抗虫品种IR26和IR36的土壤放线菌含量也显著降低。多因素方差分析结果显示,水稻品种对土壤pH值和微生物数量无显著影响,而对土壤中蔗糖酶和脲酶活性有显著影响;褐飞虱取食和取食时间对土壤pH值、蔗糖酶、脲酶和微生物数量均有显著影响。The changes in pH value,soil enzyme activity and microbe density in the rhizosphere of potted rice plants fed by rice brown planthoppers （BPH）,Nilaparvata lugens for different days were investigated on BPH-susceptible rice variety （TN1 ）and two resistant varieties （IR26 and IR36 ）,for comparing the BPH-feeding-associated underground ecological systems among rice resistant varieties.The rhizosphere soil pH value of TN1 plants was significantly lower than that of BPH-free plants without significant deference among resistant varieties one day and five days after BPH feeding.The activities of sucrase and urease in rhizosphere did not differ among treatments one day after BPH feeding, while sucrase activity significantly increased and urease activity reduced in IR36 plant soil nine day after BPH feeding as compared with that in the BPH-free plant rhizosphere soil.The soil bacterial density in rhizosphere of IR36 significantly reduced only one day of BPH feeding,and fungal density in the rhizosphere of TN1 significantly reduced five days after BPH feeding,the soil actinomycete density in the rhizosphere of IR26 and IR36 significantly reduced.Multi-factor analysis of variance showed that rice variety did not affect pH value and microbe population of rhizosphere soil and greatly affected the soil enzyme activity.Moreover,BPH feeding and feeding duration significantly affected pH value, soil enzyme activity and microbe density in the rhizosphere.

关 键 词：水稻品种 褐飞虱 取食时间 土壤PH值 土壤酶 土壤微生物 

分 类 号：S511[农业科学—作物学]