干旱区生态环境知识资源中心(Arid): Diurnal and seasonal variations of soil respiration rate under different row-spacing in a Panicum virgatum L. field on semi-arid Loess Plateau of China

Arid

	Diurnal and seasonal variations of soil respiration rate under different row-spacing in a Panicum virgatum L. field on semi-arid Loess Plateau of China
	Huang Jin; Gao Zhijuan; Chen Ji; Zhang He; Xu Bingcheng
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:3 页码:341-349
英文摘要	Soil respiration (SR) in crop field is affected by environmental factors, agronomic practices and crop types. To clarify how planting density affects the SR dynamics in switchgrass (Panicum virgatum L.) field on the semi-arid Loess Plateau, this research investigated diurnal and seasonal changes of soil respiration rate (RS) under three different row-spacing treatments (20, 40 and 60 cm) in the fourth growing year of switchgrass. Results showed that RS presented a pronounced seasonality under all row-spacing treatments. The highest daily average RS values appeared in August, while the lowest (P<0.05) were in September for each row-spacing. Diurnal variations of RS exhibited single-peak curves in each month. Daily average RS increased significantly as row-spacing enlarged during May and August but there was no significant difference among row-spacing treatments in September. Soil water storage in the depth of 0-100 cm had no significant difference (P>0.05) among the row-spacing treatments, and similar results were found for soil temperature in 0-15 cm soil depth. Soil respiration temperature sensitivity (Q10) values were 1.0-3.7 during the growing months, which were strongly correlated with air temperature in May and June and the soil temperature at 15 cm depth in August. Higher aboveground biomass production and lower RS in most growth months indicated that 20 cm row-spacing treatment was beneficial for increasing the carbon fixation in switchgrass field. Results also implied that it is necessary to take into account the influence of phenology and root growth of switchgrass on soil respiration for accurately evaluating the carbon cycle in the region.
英文关键词	switchgrass row-spacing soil temperature soil water Q_(10) value
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5688552
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335636
作者单位	Huang Jin, Institute of Soil and Water Conservation, Northwest A&F University, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling, Shanxi 712100, China.; Xu Bingcheng, Institute of Soil and Water Conservation, Northwest A&F University, State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Yangling, Shanxi 712100, China.; Gao Zhijuan, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shanxi 712100, China.; Chen Ji, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shanxi 712100, China.; Zhang He, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shanxi 712100, China.
推荐引用方式 GB/T 7714	Huang Jin,Gao Zhijuan,Chen Ji,et al. Diurnal and seasonal variations of soil respiration rate under different row-spacing in a Panicum virgatum L. field on semi-arid Loess Plateau of China[J],2016,8(3):341-349.
APA	Huang Jin,Gao Zhijuan,Chen Ji,Zhang He,&Xu Bingcheng.(2016).Diurnal and seasonal variations of soil respiration rate under different row-spacing in a Panicum virgatum L. field on semi-arid Loess Plateau of China.Journal of Arid Land,8(3),341-349.
MLA	Huang Jin,et al."Diurnal and seasonal variations of soil respiration rate under different row-spacing in a Panicum virgatum L. field on semi-arid Loess Plateau of China".Journal of Arid Land 8.3(2016):341-349.