干旱区生态环境知识资源中心(Arid): Salinity effects on soil organic carbon and its labile fractions, and nematode communities in irrigated farmlands in an arid region, northwestern China

Arid

	Salinity effects on soil organic carbon and its labile fractions, and nematode communities in irrigated farmlands in an arid region, northwestern China
	Su Yongzhong; Liu Tingna; Wang Xuefen; Yang Rong
来源期刊	Sciences in Cold and Arid Regions
ISSN	1674-3822
出版年	2016
卷号	8 期号:1 页码:46-53
英文摘要	The effects of salinity on soil organic carbon (SOC) and its labile fractions including microbial biomass carbon (MBC) and easily oxidation organic carbon (EOC), basal soil respiration, and soil nematode community in the Fluvents, an oasis in an arid region of northwestern China were investigated. Five sites were selected which had a salinity gradient with different groundwater table from 1.0 m to 4.0 m. Soils were sampled at the 0-20 cm plough layer from 25 irrigated fields of five sites and electrical conductivity was measured in the saturation paste extracts (ECe). Soils were categorized into five salinity levels: (1) non-saline, (2) very slightly saline, (3) slightly saline, (4) moderately saline, and (5) strongly saline according to the values of ECe. The results show that SOC and total nitrogen concentration, cation exchange capacity (CEC), and the concentrations of labile organic fractions (MBC, EOC), and basal soil respiration decreased significantly with increasing ECe. The relationships between ECe and MBC, EOC and basal soil respiration were best described by power functions. Slight and moderate salinity had no significant impact on soil nematode abundance, but excessive salt accumulation led to a marked decline in soil nematode community diversity and abundance. Soil salinity changed soil nematode trophic groups and bacterivores were the most abundant trophic groups in salt-affected soils. Further study is necessary to identify the response of soil microbial processes and nematode community dynamics to soil salinity.
英文关键词	salinity soil organic carbon labile organic carbon basal soil respiration soil nematode
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5636608
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335616
作者单位	Su Yongzhong, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Liu Tingna, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Yang Rong, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Wang Xuefen, Jinlin Agricultural University, Changchun, Jilin 130118, China.
推荐引用方式 GB/T 7714	Su Yongzhong,Liu Tingna,Wang Xuefen,et al. Salinity effects on soil organic carbon and its labile fractions, and nematode communities in irrigated farmlands in an arid region, northwestern China[J],2016,8(1):46-53.
APA	Su Yongzhong,Liu Tingna,Wang Xuefen,&Yang Rong.(2016).Salinity effects on soil organic carbon and its labile fractions, and nematode communities in irrigated farmlands in an arid region, northwestern China.Sciences in Cold and Arid Regions,8(1),46-53.
MLA	Su Yongzhong,et al."Salinity effects on soil organic carbon and its labile fractions, and nematode communities in irrigated farmlands in an arid region, northwestern China".Sciences in Cold and Arid Regions 8.1(2016):46-53.