玉米秸秆还田对土壤有机碳、微生物功能多样性及甘蓝产量的影响  

Effects of corn straw returning on soil organic carbon content,microbial functional diversity and cabbage yield

作　　者：邵泱峰[1] 梅洪飞[1] 潘忠潮[1] 刘欢[2] 王超琦[2] 

机构地区：[1]临安市农业技术推广中心,浙江临安311300 [2]浙江农林大学环境与资源学院,浙江临安311300

出　　处：《浙江农业学报》2016年第5期838-842,共5页Acta Agriculturae Zhejiangensis

基　　金：浙江省重大科技专项(2011C02001)

摘　　要：在甘蓝蔬菜地采用随机区组设计,共设4个秸秆还田试验处理,即JG1(低用量,秸秆7 500 kg·hm^(-2)),JG2(中用量,秸秆11 250 kg·hm^(-2)),JG3(高用量,秸秆22 500 kg·hm^(-2))和CK(秸秆不还田),采集分析不同处理土壤有机碳及微生物功能多样性。结果表明:秸秆还田后显著提高土壤微生物量碳(MBC)和水溶性有机碳(WSOC)含量,MBC增加了127.0%~147.7%,WSOC提高了54.1%~69.4%。中、高用量玉米秸秆还田后,土壤微生物活性(AWCD)、微生物Shannon指数(H)和均匀度指数(E)均显著高于对照,甘蓝产量分别提高16.6%和11.1%。研究结果表明,秸秆还田是一种有效提高土壤有机碳及微生物功能多样性的土壤管理方法。A field trail with a random block design was carried out in cabbage field with three replicates. There were total four treatments： JG1（ low usage of straw returning,7 500 kg·hm^（-2））,JG2（ medium usage of straw returning,11 250 kg·hm^（-2））,JG3（ high usage of straw returning,22 500 kg·hm^（-2）） and non-straw returning（ the control）.We compared the difference of soil carbon and microbial community functional diversity among different treatments.The result showed that compared with the control,straw returning could significantly enhance the contents of soil microbial biomass carbon（ MBC） and water-soluble organic carbon（ WSOC）,with 127. 0%- 147. 7% and 54. 1%-69. 4%,respectively. Soil microbial activity（ AWCD） values,the microbial diversity indexes（ H） and evenness index（ E） in the treatments of medium and high usage of straw returning were much higher than that of the control（ P 0. 05）,the cabbage yield were increased by 16. 6% and 11. 1%,respectively. In a word,corn straw returning is an effective soil management practice for improvement of soil quality.

关 键 词：玉米秸秆 土壤有机碳 水溶性有机碳 微生物量碳 微生物功能多样性 

分 类 号：S714.8[农业科学—林学]