干旱区生态环境知识资源中心(Arid): 黑河中游绿洲不同开垦年限农田土壤线虫群落特征

Arid

	黑河中游绿洲不同开垦年限农田土壤线虫群落特征
其他题名	Characteristics of soil nematode community along an age sequence of sandy desert soil cultivation in a marginal oasis of middle reaches of Heihe River
	王雪峰; 苏永中; 杨荣
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2010
卷号	21 期号:8 页码:2125-2131
中文摘要	对不同开垦年限绿洲农田土壤线虫群落结构特征进行研究,探讨以土壤线虫作为指示生物来评价农作年限对绿洲土壤生态系统结构的影响.共捕获线虫27921条,属25科34属.土壤中的线虫总数随农田开垦年限的增长而增加,食细菌线虫和植物寄生线虫数量在不同开垦年限农田中均占优势,对线虫总数起决定作用,构成了绿洲农田土壤线虫群落的主体;对均匀度指数(J)和优势度指数(lambda)进行分析表明, 0、10年和老绿洲农田(>50年)线虫群落结构单一,生态系统处于不稳定状态;成熟度指数(MI_(2-5))和总成熟度指数(MMI)随农田开垦时间的延长而降低.随着农作年限的增加,人为耕作活动对农田土壤生态系统的扰动呈增强趋势,系统结构在时间序列上可分为两个阶段,荒漠土壤开垦10年后土壤性状发生显著变化,是土壤生态系统结构稳定性发生变化的关键时期.土壤线虫群落能够指示由于开垦年限不同所引起的绿洲农田土壤生态系统的变化
英文摘要	This paper studied the characteristics of soil nematode community following the conversion of native sandy desert soil to irrigated farmland in a marginal oasis of the middle reaches of Heihe River basin, aimed to approach the bioindicating function of soil nematodes in soil evolution process. A total of 27921 soil nematode individuals were captured, belonging to 25 families and 34 genera. The total number of nematodes increased gradually with increasing age of cultivation. At all sampling sites, bacterivores and plant parasites were the dominant trophic groups, and made up the main parts of nematode community in oasis farmland. Through the analysis of the evenness index (J) and dominance index (A) of nematode community, the ecosystems were found to be fragile for the farmlands having cultivated for 0, 10, and >50 years. The maturity index MI_(2-5) and MMI decreased with increasing cultivation age, suggesting that the practice of agricultural use enhanced the disturbance on farmland. The soil properties changed significantly after 10 years of cultivation, which was at a significant change stage for the structure stability of soil ecosystems. The characteristics of soil nematode community could be used as the bioindicator of soil evolution following the conversion of native desert soil to irrigated farmland
中文关键词	绿洲农田 ; 开垦年限 ; 线虫群落 ; 生态指数
英文关键词	oasis farmland cultivatied age nematode community ecological index
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3977766
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225864
作者单位	中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站流域生态-水文重点实验室, 中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站流域生态-水文重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	王雪峰,苏永中,杨荣. 黑河中游绿洲不同开垦年限农田土壤线虫群落特征[J]. 中国科学院西北生态环境资源研究院,2010,21(8):2125-2131.
APA	王雪峰,苏永中,&杨荣.(2010).黑河中游绿洲不同开垦年限农田土壤线虫群落特征.应用生态学报,21(8),2125-2131.
MLA	王雪峰,et al."黑河中游绿洲不同开垦年限农田土壤线虫群落特征".应用生态学报 21.8(2010):2125-2131.