学术论文

      秸秆还田对黑土农田土壤甲螨群落结构的影响

      Effect of on-site recycling of straw on community structure of soil Oribatida in black soil farmland

      摘要:
      为探讨秸秆还田对农田土壤甲螨群落结构的影响,于2014年6月和10月、2015年6月和10月采用改良的Tullgren漏斗法,采集东北黑土区秸秆还田4年(SR4)、秸秆还田10年(SR10)和无秸秆还田(CK)样地土壤,对土壤甲螨群落结构进行研究。结果表明:4个采样时期共捕获土壤螨类11366只,其中甲螨8373只,占74%;SR4、SR10和CK中,甲螨的分布密度分别为13774、11946、5871 Ind·m-2,分别隶属于15、12属和7属;秸秆还田(F=81.954,P<0.001)、季节(F=56.649,P<0.001)、秸秆还田和季节交互作用(F=11.289,P<0.001)都对土壤甲螨个体数量有显著性影响,而对甲螨类群数影响不显著;秸秆还田能够显著影响甲螨群落的丰富度指数、均匀度指数、多样性指数、优势度指数和密度-类群指数;季节动态上,表现出秋季甲螨分布密度普遍高于夏季。聚类分析也表明,秸秆还田黑土农田系统中甲螨群落组成(SR4与SR10)与传统耕作(CK)显著不同,而SR4和SR10处理的差异不明显。以上研究表明,秸秆还田有利于提高土壤甲螨群落结构多样性和密度,对土壤甲螨具有重要的保育作用,有利于农田土壤生态环境的保护和土壤肥力提升。
      Abstract:
      On-site recycling of straw is an important method of soil fertility management in farmland. Straw is not only habitat for soil fauna, but also as a main source of litter. However, little is known about the effect of straw recycling on the community structure of soil fauna. In or-der to better understand the influence of straw recycling on community structure of soil Oribatida in black soil, an experiment was conducted in black soil farmland in Northeast China. Soil samples were collected from 0~20 cm soil layer under straw recycling for 4 years(SR4), 10 years(SR10)and conventional tillage(CK)in June and October of 2014 and 2015 and a modified Tullgren method was used to extract soil mites from the soil samples. A total of 11 366 soil mites were captured on four sampling dates, of which 8373(74%)were Oribatida. The den-sity of soil Oribatida was SR4:13 774 per square meter, 15 families SR10:11 946 per square meter, 12 families and CK:5871 per square meter, 7 families. Straw recycling, season, and the interaction between straw recycling and season all had significant(P<0.001)effects on individual density of soil Oribatida, but not on the number of families of Oribatida. Straw recycling also significantly affected the richness in-dex, the evenness index, the diversity index, the dominance index and the density-groups index of Oribatida. The density of the dominant species of soil Oribatida in autumn were generally higher than those in summer. Cluster analysis also showed that the Oribatida communities in SR4 and SR10 were significantly different from CK, but not from each other. Our results indicated that straw recycling is conducive to maintaining the diversity and density of soil Oribatida communities, and to the protection of ecological environment and fertility of the soils.
      作者: 连旭 [1] 隋玉柱 [2] 武海涛 [3] 刘冬 [3] 郗敏 [2] 管强 [3]
      Author: LIAN Xu [1] SUI Yu-zhu [2] WU Hai-tao [3] LIU Dong [3] XI Min [2] GUAN Qiang [3]
      作者单位: 青岛大学环境科学与工程学院,山东 青岛 266071; 中国科学院东北地理与农业生态研究所,湿地生态与环境重点实验室,长春 130102 青岛大学环境科学与工程学院,山东 青岛,266071 中国科学院东北地理与农业生态研究所,湿地生态与环境重点实验室,长春 130102
      刊 名: 农业环境科学学报 ISTICPKU
      年,卷(期): 2017, 36(1)
      分类号: X712
      在线出版日期: 2017年3月8日
      基金项目: 国家自然科学基金项目(41371261);吉林省科技发展计划项目(20140101004JC);中国科学院重点部署项目(KZZD-EW-TZ-16)Project supportedThe National Natural Science Foundation of China(41371261);The Jilin Provincial Research Foundation for Science and Technology Development,China(20140101004JC);The Major Deployment Program of the Chinese Academy of Sciences, China