间作绿肥对油菜根际土壤碳氮及根际微生物的影响  

Effects of intercropping green manure on soil carbon,nitrogen and soil microbial in rapeseed rhizosphere

作　　者：周泉[1,2] 张小短[1] 马淑敏 邢毅[1] 陈娇[1] 石超[1] 王龙昌[1] ZHOU Quan;ZHANG Xiaoduan;MA Shumin;XING Yi;CHEN Jiao;SHI Chao;WANG Longchang(College of Agronomy and Biotechnology, Southwest University / Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education / Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China;Research Center on Ecological Sciences, Jiangxi Agricultural University / Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Nanchang 330045, China)

机构地区：[1]西南大学农学与生物科技学院,三峡库区生态环境教育部重点实验室,南方山地农业教育部工程研究中心,重庆400716 [2]江西农业大学生态科学研究中心/作物生理生态与遗传育种教育部重点实验室,南昌330045

出　　处：《生态学报》2017年第23期7965-7971,共7页Acta Ecologica Sinica

基　　金：公益性行业(农业)科研专项(201503127);国家自然科学基金项目(31271673)

摘　　要：在我国西南紫色土地区,农田生态环境极为脆弱,绿肥应用也面临严峻问题。为改善农田土壤健康状况,探索绿肥的应用途径,通过紫云英与油菜间作,重点探讨了绿肥紫云英对油菜根际土壤碳氮及其微生物特征的影响,同时与秸秆覆盖的效应作了比较,其创新性在于将绿肥紫云英应用于西南旱地,并且为建立新的油菜种植模式作铺垫。结果表明:与秸秆覆盖相比,间作绿肥紫云英是影响油菜根际土壤环境的主要因素。间作紫云英减少了油菜根际土壤碳、氮含量,改变了油菜根际土壤碳氮比。间作紫云英也减少了油菜根际土壤微生物量,改变了油菜根际土壤微生物群落结构,改善了油菜根际土壤通气状况,抑制了厌氧细菌的生长。In purple soil region of southwest China, the eco-environment is extremely fragile in farmlands, and the application of green manure is facing serious problems. In order to improve soil health and explore the application way of green manure, the effects of intercropping green manure （Chinese milk vetch） on soil carbon, nitrogen and soil microbial in rapeseed rhizosphere was examined and compared with those of straw mulching. Chinese milk vetch was innovatively applied in dry land so as to establish a new rapeseed planting pattern in southwest China. Results showed that, compared with straw mulching, intercropping Chinese milk vetch was the main factor to affect soil environment in rapeseed rhizosphere. Intercropping Chinese milk vetch substantially decreased the content of carbon and total nitrogen and changed the C/N ratio in rapeseed rhizosphere. It also decreased the total PLFA （phospholipid fatty acid）, changed the structure of soil microbial community, improved the soil aeration condition and inhibited the growth of anaerobic bacteria in rapeseed rhizosphere.

关 键 词：紫云英 秸秆覆盖 根系互作 有机碳 微生物 

分 类 号：S153.6[农业科学—土壤学] S154.3[农业科学—农业基础科学]