Effect of intensity of small rainfall simulation in spring on annuals in Horqin Sandy Land, China (EI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Effect of intensity of small rainfall simulation in spring on annuals in Horqin Sandy Land, China (EI)
	Ma Y.; Zhang T.; Liu X.
刊名	Environmental Earth Sciences
	2015
卷号	74 期号:1 页码:727-735
英文摘要	The composition and development of sandy land plant communities in arid and semiarid environments largely depend on rainfall pulses. However, little is known about how the intensity of small rainfall events affects the emergence and growth of annuals in spring. For this study, an experiment was designed to simulate the effect of low-intensity spring rainfall events on annuals in Horqin Sandy Land, China, in May of 2011 and 2012. It included rainfall treatments of 2mm (applied 16 times), 4mm (applied 8 times), and 8mm (applied 4 times), and a control check (CK, which received natural rainfall). The soil water content, species composition, seed germination, plant density, height, and coverage, and aboveground biomass were measured. Results showed that rainfall intensity had a significant influence on the emergence and growth of annuals. A rainfall of 8mm was the threshold for germination, whether as a single rainfall event or as accumulated rainfall. The 8-mm treatment also resulted in the greatest number of seedlings, while the 2-mm treatment provided the least. Community characteristics such as species number, density, and coverage increased with rainfall intensity; height and canopy decreased; the Shannon-Wiener index showed no obvious trend. The distribution of rain amount and frequency impacted biomass accumulation: with increased rainfall intensity and extended rainfall intervals, biomass was significantly increased compared to the control check. 2015, Springer-Verlag Berlin Heidelberg.
收录类别	EI
语种	英语
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/27173]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Ma Y.,Zhang T.,Liu X.. Effect of intensity of small rainfall simulation in spring on annuals in Horqin Sandy Land, China (EI)[J]. Environmental Earth Sciences,2015,74(1):727-735.
APA	Ma Y.,Zhang T.,&Liu X..(2015).Effect of intensity of small rainfall simulation in spring on annuals in Horqin Sandy Land, China (EI).Environmental Earth Sciences,74(1),727-735.
MLA	Ma Y.,et al."Effect of intensity of small rainfall simulation in spring on annuals in Horqin Sandy Land, China (EI)".Environmental Earth Sciences 74.1(2015):727-735.