秸秆还田对黑土农田土壤甲螨群落结构的影响

发布时间：2018-07-11 13:04

本文选题：秸秆还田 + 土壤螨类　；参考：《农业环境科学学报》2017年01期

【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11 366只,其中甲螨8373只,占74%;SR4、SR10和CK中,甲螨的分布密度分别为13 774、11946、5871 Ind·m-2,分别隶属于15、12属和7属;秸秆还田(F=81.954,P0.001)、季节(F=56.649,P0.001)、秸秆还田和季节交互作用(F=11.289,P0.001)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]:In order to investigate the effect of straw returning to soil acaroid mite community structure in farmland, the modified Tullgren funnel method was used in June 2014 and October, in June 2015 and October, to collect 4 years of straw returning in the northeast black soil area (SR4), 10 years of straw returning to the field (SR10) and no straw returning (CK) soil. The structure of soil acaroid mite community was studied. The results showed that 4 11366 soil mites were captured during the sampling period, including 8373 mite and 74%. In SR4, SR10 and CK, the distribution density of mite was 13774119465871 Ind. M-2 respectively, which belonged to 15,12 and 7 genera respectively. Straw returning (F=81.954, P0.001), season (F=56.649, P0.001), straw returning and seasonal interaction (F=11.289, P0.001) were all to soil mite There was a significant influence on the number of individuals, but not significant influence on the number of acaroid mites; straw returning could significantly affect the richness index, evenness index, diversity index, dominance index and density class index, and the seasonal dynamics showed that the density of mite in autumn was generally higher than that in summer. The composition of mite community (SR4 and SR10) in the farmland system of field black soil is significantly different from that of traditional tillage (CK), but the difference between SR4 and SR10 is not obvious. The above study shows that straw returning can improve the diversity and density of soil mite community, and it has an important conservation effect on soil mite, which is beneficial to the protection of soil ecological environment in farmland. And soil fertility.
【作者单位】：青岛大学环境科学与工程学院;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;
【基金】：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)~~
【分类号】：S154.6

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