气候变化领域集成服务门户(CCPortal): Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau

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DOI	10.1007/s11104-012-1279-3
	Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau
	Zhang, Zhenhua; Duan, Jichuang; Wang, Shiping; Luo, Caiyun; Zhu, Xiaoxue; Xu, Burenbayin; Chang, Xiaofeng; Cui, Shujuan
通讯作者	Wang, SP (通讯作者)
发表日期	2013
ISSN	0032-079X
EISSN	1573-5036
起始页码	287
结束页码	299
卷号	362 期号:1-2
英文摘要	Few studies have investigated the effect of nitrogen (N) fertilizer on ecosystem respiration (Re) under mixed legume and grass pastures sown at different seeding ratios,and data are almost entirely lacking for alpine meadow of the Tibetan Plateau. Our aim was to test the hypothesis that although a combination of legumes with grass and N fertilizer increases Re the combination decreases Re intensity (i.e. Re per unit of aboveground biomass) due to greater increases in aboveground biomass compared to increases in Re. This hypothesis was tested using different seeding ratios of common vetch (Vicia sativa L.) and oat (Avena sativa L.) with and without N fertilizer on the Tibetan plateau in 2009 and 2010. Re was measured using a static closed opaque chamber. Re intensity was estimated as the ratio of seasonal average Re during the growing season to aboveground biomass. Compared with common vetch monoculture pasture, mixed legume-grass pastures only significantly decreased Re intensity (with a decrease of about 75 %-87 %) in the drought year 2009 due to greater increases in aboveground biomass compared to increases in Re. There were no significant differences in Re and Re intensity among different seeding ratios of oat and common vetch in either year. N fertilizer significantly decreased Re intensity for common vetch monoculture pasture by 24.5 % in 2009 and 69.5 % in 2010 although it did not significantly affect plant production and Re. From the perspective of forage yield and Re, planting mixed legume-grass pastures without N fertilizer is a preferable way to balance the twin objectives of forage production and mitigation of atmospheric greenhouse gas emissions in alpine regions.
关键词	SOIL ORGANIC-MATTER MICROBIAL BIOMASS CARBON-DIOXIDE ALPINE MEADOW INTERSPECIFIC COMPETITION PERENNIAL RYEGRASS METHANE FLUXES PEA TEMPERATE FIXATION
英文关键词	Pasture; Mixed seeding; Monoculture; Ecosystem respiration; Respiration intensity; Alpine meadow
语种	英语
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS记录号	WOS:000312729400023
来源期刊	PLANT AND SOIL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258108
推荐引用方式 GB/T 7714	Zhang, Zhenhua,Duan, Jichuang,Wang, Shiping,et al. Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2013,362(1-2).
APA	Zhang, Zhenhua.,Duan, Jichuang.,Wang, Shiping.,Luo, Caiyun.,Zhu, Xiaoxue.,...&Cui, Shujuan.(2013).Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau.PLANT AND SOIL,362(1-2).
MLA	Zhang, Zhenhua,et al."Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau".PLANT AND SOIL 362.1-2(2013).