苜蓿田及不同邻作地地表步甲群落多样性及其扩散动态

发布时间：2018-06-26 20:00

本文选题：步甲 + 物种多样性　；参考：《草业学报》2017年02期

【摘要】：本研究选取宁夏银川市贺兰山农牧场苜蓿地及苜蓿-玉米、苜蓿-小麦、苜蓿-防护林、苜蓿-休闲地4种邻作边缘带,用陷阱法对步甲科昆虫种类和个体数进行了调查,研究了地表步甲昆虫的物种组成与数量、多样性以及季节迁移动态。调查共采集步甲昆虫9239头,21种。其中毛青步甲(Chlaenius pallipes)、谷婪步甲(Harpaluscal ceatus)、彩角青步甲(Chlaenius touzalini)分别占总个体数的41.17%,18.77%,17.07%,为该地区的优势种类。分析表明,4种邻作型的苜蓿边缘地步甲丰富度为防护林-苜蓿边缘地小麦-苜蓿边缘地=玉米-苜蓿边缘地休闲地-苜蓿边缘地;多样性为小麦-苜蓿边缘地防护林-苜蓿边缘地玉米-苜蓿边缘地休闲地-苜蓿边缘地;小麦-苜蓿边缘地的均匀度指数和优势度指数均为最高。苜蓿边缘地与相邻作物边缘地步甲群落多样性比较,前者的步甲多样性指数明显高于后者。地表步甲种群在苜蓿田边缘带与相邻作物田边缘带之间存在着明显的季节迁移,其迁移动态的程度受不同邻作作物类型、苜蓿刈割及灌水等农事操作的显著影响。
[Abstract]:In this study, four kinds of alfalfa fields and alfalfa-corn, alfalfa-wheat, alfalfa-shelterbelt and alfalfa-leisure land were selected as edge zones in agricultural pasture of Helan mountain in Yinchuan city, Ningxia. The species and individual number of beetles were investigated by trap method The species composition and quantity, diversity and seasonal migration dynamics of the ground beetle were studied. A total of 21 species of 9239 beetles were collected. Chlaenius pallipes), ceatus), touzalini accounts for 41.1777 and 17.07, respectively, which is the dominant species in this area. The results showed that the richness of four adjacent alfalfa edge areas was shelterbelt-alfalfa edge wheat-alfalfa edge field = corn-alfalfa edge land leisure land-alfalfa edge land. The diversity was wheat-alfalfa fringe shelterbelt, alfalfa fringe corn, alfalfa margin leisure land and alfalfa edge land, and the evenness index and dominance index of wheat-alfalfa edge land were the highest. The diversity index of the alfalfa marginal land was significantly higher than that of the adjacent crops, and the diversity index of the former was significantly higher than that of the latter. There was obvious seasonal migration between the marginal zone of alfalfa field and the marginal zone of adjacent crop field, and the migration dynamics were significantly affected by the farming operations such as different crop types, cutting and irrigation of alfalfa.
【作者单位】：宁夏大学农学院;宁夏大学西北退化生态系统恢复与重建国家重点实验室培育基地;
【基金】：国家自然科学基金(31260429) 教育部高校博士点科研专项基金(20126401110003)资助
【分类号】：S186

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