Evaluation of switchgrass and sainfoin intercropping under 2:1 row-replacement in semiarid region, northwest China

ISWC OpenIR > 水保所知识产出(1956---)

	Evaluation of switchgrass and sainfoin intercropping under 2:1 row-replacement in semiarid region, northwest China
	Xu, BC (Xu, Bingcheng)1; Shan, L (Shan, Lun)1; Zhang, SQ (Zhang, Suiqi)1; Deng, XP (Deng, Xiping)1; Li, FM (Li, Fengmin)1,2; Li, FM
	2008
发表期刊	AFRICAN JOURNAL OF BIOTECHNOLOGY
卷号	7 期号:22 页码:4056-4067
摘要	Field experiments were carried out under natural conditions to compare the aboveground biomass, root growth and distribution, and topsoil nutrition contents of switchgrass (Panicum virgatum) and sainfoin (Onobrychis viciaefolia) grown in sole cropping and 2: 1 row-replacement intercropping in semiarid loess region on Loess Plateau of northwest China. The sole and intercropping was compared based on the aboveground biomass, water use efficiency (WUE), soil organic matter (SOM) and total nitrogen (TN), and root biomass and distribution. The aboveground biomass production was measured every year at the end of growth seasons in 2001-2005. Root biomass and vertical distribution were studied only in 2005. Topsoil SOM and TN contents were measured discontinuously during the study period. Results showed that intercropping reduced the aboveground biomass production of sainfoin significantly compared with its pure stand. The WUE of sole switchgrass was significantly the highest in each year among the three stands, while the intercropped stand was significantly higher than sole sainfoin on five-year averaged. The aggressivity of sainfoin to swichgrass decreased along with the growth years. Before 2005, the land equivalent ratio (LER) was bigger than 1.0 and actual yield loss (AYL) was positive. Under intercropping, root biomass input and root: shoot ratio in switchgrass reduced, while sainfoin inputs more photosynthate to root growth. Switchgrass had high root biomass and wide distribution vertically and horizontally indicates a higher belowground competitive ability in the mixture. It indicated a flexible distribution strategy of switchgrass tending to increase soil exploitation and space sequestration efficiency in soil layers. SOM and TN increased significantly for the three stands at the end of the fourth growth year, especially for the mixture. Switchgrass and sainfoin intercropped under 2: 1 row-replacement can be a short-term rotation tillage choice with respect to soil management in the area.
关键词	Aboveground Biomass Competition Intercropping Root Distribution Sainfoin Switchgrass
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/4840
专题	水保所知识产出(1956---)
通讯作者	Li, FM
推荐引用方式 GB/T 7714	Xu, BC ,Shan, L ,Zhang, SQ ,et al. Evaluation of switchgrass and sainfoin intercropping under 2:1 row-replacement in semiarid region, northwest China[J]. AFRICAN JOURNAL OF BIOTECHNOLOGY,2008,7(22):4056-4067.
APA	Xu, BC ,Shan, L ,Zhang, SQ ,Deng, XP ,Li, FM ,&Li, FM.(2008).Evaluation of switchgrass and sainfoin intercropping under 2:1 row-replacement in semiarid region, northwest China.AFRICAN JOURNAL OF BIOTECHNOLOGY,7(22),4056-4067.
MLA	Xu, BC ,et al."Evaluation of switchgrass and sainfoin intercropping under 2:1 row-replacement in semiarid region, northwest China".AFRICAN JOURNAL OF BIOTECHNOLOGY 7.22(2008):4056-4067.