干旱区生态环境知识资源中心(Arid): 库布齐沙地四种植被类型土壤呼吸的昼夜变化及其影响因子

Arid

	库布齐沙地四种植被类型土壤呼吸的昼夜变化及其影响因子
其他题名	Diurnal Variation of Soil Respirations of Four Vegetations and the Affecting Factors in HoBq Sand
	戴雅婷; 闫志坚; 吴洪新; 解继红; 侯向阳; 高丽
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2018
卷号	40 期号:2 页码:102-108
中文摘要	采用Li-6400-09土壤呼吸室对库布齐沙地四种植被类型土壤呼吸速率进行测定,分析不同植被类型土壤呼吸速率昼夜变化特征、土壤呼吸日均值差异性及其对水热因子的响应。结果表明:(1)库布齐沙地四种植被类型土壤呼吸的昼夜变化格局不同,固定、半固定沙地油蒿群落呈单峰曲线,中间锦鸡儿群落和苜蓿草地呈双峰型,峰值总体出现在12∶00~16∶00,最低值出现在3∶00~6∶00之间;四种植被类型昼、夜间土壤呼吸速率具有极显著差异(P<0.01)。(2)四种植被类型土壤呼吸速率日均值之间存在显著差异,大小为:苜蓿草地>中间锦鸡儿群落>固定沙地油蒿群落>半固定沙地油蒿群落。(3)土壤水热因子的交互作用对土壤呼吸速率的影响高于土壤温度单因子模型。(4)近地面大气温度、湿度与土壤呼吸速率的相关性要高于土壤水热因子,是影响四种植被类型土壤呼吸速率昼夜变化的主要因子。
英文摘要	In order to elucidate carbon cycling in desert ecosystem, respiration of soils in four vegetations in natural and artificial restoration and its environmental factors were investigated in Hobq sand. Soil respiration was measured in the vegetation growing season(July,2012) using LI-6400 Automated Soil CO_2 Flux System. Soil temperature and water content, air temperature and moisture were also tested. The results showed that the day and night time Rs pattern was different among four vegetations. The soil respiration rate of Artemisia ordosica community in fixed and half-fixed sandy land had a single-peak curve, Caragana intermedia and Medicago sativa community showed a bimodal curve, peak values of soil respiration rate appeared in 12∶00~16∶00, minimum of Rs appeared in 3∶00~6∶00. Mean value of day-time Rs was significantly different from mean value of night-time Rs(P<0.01).In the growing season, there were differences in daily mean value of soil respiration rate among four vegetations, and the order was Medicago sativa>Caragana intermedia>Artemisia ordosica community in fixed sandy land>Artemisia ordosica community in half-fixed sandy land. The effect of interaction between soil temperature and water content on soil respiration rate was higher than that of soil temperature. The correlation between soil respiration rate and air temperature and moisture was highre in surface soil.
中文关键词	土壤呼吸 ; 植被类型 ; 水热因子
英文关键词	Soil respiration Vegetation type Hydro-thermal factors
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:6223454
来源机构	中国农业科学院草原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238654
作者单位	中国农业科学院草原研究所, 农业部草地生态与修复治理重点实验室, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	戴雅婷,闫志坚,吴洪新,等. 库布齐沙地四种植被类型土壤呼吸的昼夜变化及其影响因子[J]. 中国农业科学院草原研究所,2018,40(2):102-108.
APA	戴雅婷,闫志坚,吴洪新,解继红,侯向阳,&高丽.(2018).库布齐沙地四种植被类型土壤呼吸的昼夜变化及其影响因子.中国草地学报,40(2),102-108.
MLA	戴雅婷,et al."库布齐沙地四种植被类型土壤呼吸的昼夜变化及其影响因子".中国草地学报 40.2(2018):102-108.