气候变化领域集成服务门户(CCPortal): Seeding ratios and phosphate fertilizer on ecosystem carbon exchange of common vetch and oat

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DOI	10.1007/s10705-017-9873-7
	Seeding ratios and phosphate fertilizer on ecosystem carbon exchange of common vetch and oat
	Luo, Caiyun; Wang, Shiping; Zhao, Liang; Xu, Shixiao
通讯作者	Wang, SP (通讯作者)
发表日期	2017
ISSN	1385-1314
EISSN	1573-0867
起始页码	149
结束页码	160
卷号	109 期号:2
英文摘要	Few studies have investigated the effect of phosphate (P) fertilizer on net ecosystem CO2 exchange (NEE) and its components under mixed legume and grass pastures sown, which will limit our understanding about their effects on carbon (C) sequestration in soils. Our aim was to test the hypothesis that a combination of legumes with grass and P fertilizer increases NEE due to greater increases in gross primary productivity (GPP) compared to increases in ecosystem respiration (Re).We measured NEE, GPP and Re under 5 different seeding ratios of oat (Avena sativa L.) and common vetch (Vicia sativa L.) according to their thousand kernel weight and germination rate (i.e., seeding rate were: M1: 0:150, M2: 150:105, M3: 300:75, M4: 450:45 and M5: 600:0) with and P unfertilized on the Tibetan Plateau from 2011 to 2013. NEE was measured at 1-week intervals from June to September each year using a transparent chamber technique (Licor-6400). Our results showed that both P fertilizer and mixed ratio had significant effect on NEE, Re and GPP, but their interactive effects were not significant during the growing season. P fertilizer primarily increased NEE due to increased GPP for the monoculture and mixtures with a higher proportion of common vetch. NEE, Re and GPP were higher for the mixed pastures only compared with legume monoculture. From the perspective of forage yield and C sequestration, planting mixed legume-grass pastures with P fertilizer is a preferable way to balance the twin objectives of forage production and C sequestration in alpine regions.
关键词	QINGHAI-TIBETAN PLATEAU BIOLOGICAL NITROGEN-FIXATION LAND-USE CHANGE ALPINE MEADOW TEMPERATE GRASSLAND CO2 EXCHANGE PHOSPHORUS NODULES FLUXES PLANTS
英文关键词	Forage yield; Mixed legume-grass pastures; Fertilizer; Carbon sequestration
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000412459700004
来源期刊	NUTRIENT CYCLING IN AGROECOSYSTEMS
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/258936
推荐引用方式 GB/T 7714	Luo, Caiyun,Wang, Shiping,Zhao, Liang,et al. Seeding ratios and phosphate fertilizer on ecosystem carbon exchange of common vetch and oat[J]. 中国科学院青藏高原研究所,2017,109(2).
APA	Luo, Caiyun,Wang, Shiping,Zhao, Liang,&Xu, Shixiao.(2017).Seeding ratios and phosphate fertilizer on ecosystem carbon exchange of common vetch and oat.NUTRIENT CYCLING IN AGROECOSYSTEMS,109(2).
MLA	Luo, Caiyun,et al."Seeding ratios and phosphate fertilizer on ecosystem carbon exchange of common vetch and oat".NUTRIENT CYCLING IN AGROECOSYSTEMS 109.2(2017).