Effects ofGrazing on Nematode Community and Fauna inRhizosphere of Leymus chinensis

doi:10.11733/j.issn.1007-0435.2019.03.010

Acta Agrestia Sinica ›› 2019, Vol. 27 ›› Issue (3): 589-595.DOI: 10.11733/j.issn.1007-0435.2019.03.010

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Effects ofGrazing on Nematode Community and Fauna inRhizosphere of Leymus chinensis

WU Ni-er¹, ZHANG Jing², HAI Tang²

1. Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences, Hohhot, Inner Mongolia 010031, China;
2. College of Grassland and Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China

Received:2019-01-21 Revised:2019-05-19 Online:2019-06-15 Published:2019-07-19

放牧对羊草根际土壤线虫群落及区系的影响

乌尼尔¹, 张晶², 海棠²

1. 内蒙古农牧业科学院, 内蒙古呼和浩特 010031;
2. 内蒙古农业大学草原与资源环境学院, 内蒙古呼和浩特 010010

通讯作者: 海棠
作者简介:乌尼尔(1990-),男,内蒙锡盟人,硕士,主要从事草地土壤线虫研究,Email:15947414810@163.com
基金资助:
国家自然基金项目（41061026）；内蒙自然基金项目（2018MS03044）资助

Abstract

Abstract: In order to explore the influence of grazing disturbance on soil microfauna-soil nematode community in rhizosphere of Leymus chinensis,soil nematode was used as biological indicator to study the characteristics and fauna of rhizosphere soil nematode in grazing and fenced plots in typical steppe. The results showed that a total of 34 nematode genera were identified in rhizosphere of Leymus chinensis. The total number and dominant groups of soil nematode in rhizosphere of Leymus chinensis were significantly affected by grazing. The distribution of total number of soil nematode in different soil layers was fenced plots> grazing plots. The proportion of plant-parasitic nematodes in dominant and sub-dominant groups in grazing plots was significantly higher than that in fenced plots. The Shannon diversity index (H') of soil nematodes in rhizosphere of Leymus chinensis in grazing plots was significantly higher than in fenced plots. The indices for Vasileska (WI) and free-living nematode maturity index (MI) in grazing plots were lower than in fenced plots,indicating that soil health in grazing plots was poor. The distribution of soil nematode fauna in rhizosphere of Leymus chinensis was affected by grazing. Soil nematode fauna in rhizosphere of Leymus chinensis in grazing plots at 0~10 cm and 10~20 cm was distributed in B and D blocks,indicating that soil nematode food web in grazing plots was more disturbed than in fenced plots,and was unstable and degraded.

Key words: Soil nematode, Diversity, Soil nematode fauna, Grazing

摘要： 为了探索放牧干扰对羊草（Leymus chinensis Tzvel）根际土壤小型动物-土壤线虫群落的影响规律，本试验以土壤线虫为生物指标对典型草原放牧区及围栏区羊草根际土壤线虫群落特征及区系进行了研究，结果表明：羊草根际共捕获34属线虫，放牧影响羊草根际线虫总数量及优势类群，不同土层土壤线虫总数量的分布规律为：围栏区>放牧区，放牧区优势及次优势类群中植物寄生线虫类所占比例明显高于围栏区。放牧区羊草根际土壤线虫Shannon多样性指数显著高于围栏区。放牧区瓦斯乐斯卡指数及自由生活线虫成熟度指数低于围栏区，说明放牧区土壤健康状况较差。放牧影响羊草根际土壤线虫区系的分布，放牧区0~10 cm，10~20 cm羊草根际土壤线虫区系分布在B区和D区，表明放牧区土壤线虫食物网相对于围栏区受干扰大、土壤线虫食物网不稳定，且退化。

关键词: 土壤线虫, 多样性, 线虫区系, 放牧

CLC Number:

S154.37

WU Ni-er, ZHANG Jing, HAI Tang. Effects ofGrazing on Nematode Community and Fauna inRhizosphere of Leymus chinensis[J]. Acta Agrestia Sinica, 2019, 27(3): 589-595.

乌尼尔, 张晶, 海棠. 放牧对羊草根际土壤线虫群落及区系的影响[J]. 草地学报, 2019, 27(3): 589-595.

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Effects ofGrazing on Nematode Community and Fauna inRhizosphere of Leymus chinensis

放牧对羊草根际土壤线虫群落及区系的影响

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