德阳市3种林草模式下土壤动物群落特征

发布时间：2018-06-29 05:13

本文选题：林草模式 + 土壤动物　；参考：《草业科学》2016年03期

【摘要】：为了解林草模式下土壤动物组成及群落结构特征,以核桃(Juglans regia)+紫花苜蓿(Medicago sativa)、核桃+菊苣(Cichorium intybus)及核桃+鸭茅(Dactylis glomerata)3种模式为研究对象,同时以纯核桃林模式作为对照进行土壤动物调查。结果表明,1)调查共获土壤动物303只,分属3门7纲17目,优势类群为线虫纲(Nematoda)、膜翅目(Hymenoptera)、蜱螨目(Acarina);2)林草模式下土壤动物表聚性明显,纯林模式下土壤动物个体密度土层分布表现为5-10cm10-15cm0-5cm;3)核桃+苜蓿模式下Shannon-Wiener多样性指数和密度-类群指数(DG)最高,纯林模式下密度-类群指数(DG)最低,但Pielou均匀度指数最高;4)核桃+苜蓿模式下虽然土壤动物个体数明显高于纯林模式,但在类群种类上却与纯林模式最为相似;5)4种模式中,核桃+苜蓿模式腐食性(Saprozoic)土壤动物种团比例最高。综合而言,3种林草模式均能有效增长土壤动物群落组成,尤其以核桃+苜蓿模式土壤动物群落丰富程度最高。
[Abstract]:In order to understand the composition and community structure of soil fauna under forest and grass model, three models of Medicago sativa), intybus and Dactylis glomerata of Juglans regia were studied. At the same time, the model of pure walnut forest was used as control to investigate soil animals. The results showed that there were 303 soil animals, belonging to 3 phyla, 7 classes and 17 orders. The dominant groups were Nematoda, Hymenoptera and (Acarina) 2. The soil distribution of individual density of soil animals in pure forest model was 5-10 cm 10-15 cm 0-5 cm ~ (3) the Shannon-Wiener diversity index and density group index (DG) were the highest in walnut alfalfa model, and the density group index (DG) was the lowest in pure forest model. But Pielou evenness index was the highest. (4) although the individual number of soil animals was obviously higher than that of pure forest model, it was the most similar to pure forest model in group species. Saprozoic soil animal population was the highest in walnut alfalfa model. All three forest and grass models can effectively increase the composition of soil animal communities, especially walnut alfalfa model, which is the most abundant in soil animal communities.
【作者单位】：四川农业大学林学院;
【基金】：国家科技支撑计划“长江上游低山丘陵区生态综合整治技术与示范”(2011BAC09B05) “水土保持与荒漠化防治”四川省高等学校重点实验室建设项目
【分类号】：S154.5

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