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Effect of intensity of small rainfall simulation in spring on annuals in horqin sandy land, china
Ma, Yunhua1,2; Zhang, Tonghui1; Liu, Xinping1
刊名Environmental earth sciences
2015-07-01
卷号74期号:1页码:727-735
关键词Small rainfall events Annuals Germination Vegetation characteristics Horqin sandy land
ISSN号1866-6280
DOI10.1007/s12665-015-4077-4
通讯作者Zhang, tonghui(zhangth@lzb.ac.cn)
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 2 mm (applied 16 times), 4 mm (applied 8 times), and 8 mm (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 8 mm 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.
WOS关键词SHORTGRASS STEPPE ; PRECIPITATION PATTERNS ; DESERT ECOSYSTEMS ; MESIC GRASSLAND ; PLANT ; PRODUCTIVITY ; SOIL ; COMMUNITY ; DYNAMICS ; EVENTS
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
语种英语
出版者SPRINGER
WOS记录号WOS:000356347800056
内容类型期刊论文
URI标识http://www.corc.org.cn/handle/1471x/2376383
专题中国科学院大学
通讯作者Zhang, Tonghui
作者单位1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Naiman Desertificat Res Stn, Lanzhou 730000, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Ma, Yunhua,Zhang, Tonghui,Liu, Xinping. Effect of intensity of small rainfall simulation in spring on annuals in horqin sandy land, china[J]. Environmental earth sciences,2015,74(1):727-735.
APA Ma, Yunhua,Zhang, Tonghui,&Liu, Xinping.(2015).Effect of intensity of small rainfall simulation in spring on annuals in horqin sandy land, china.Environmental earth sciences,74(1),727-735.
MLA Ma, Yunhua,et al."Effect of intensity of small rainfall simulation in spring on annuals in horqin sandy land, china".Environmental earth sciences 74.1(2015):727-735.
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