Long-term grazing affects relationships between nitrogen form uptake and biomass of alpine meadow plants

CORC > 地理科学与资源研究所 > 中国科学院地理科学与资源研究所 > 生态系统研究网络观测与模拟重点实验室 > 生态网络实验室

	Long-term grazing affects relationships between nitrogen form uptake and biomass of alpine meadow plants
	Guo, Y; Liu, LP; Zheng, LL; Yu, FH; Song, MH; Zhang, XZ
刊名	PLANT ECOLOGY
	2017
卷号	218 期号:9 页码:1035-1045
关键词	Grazing release N chemical form N uptake rate Aboveground biomass Plant life history strategy
ISSN号	1385-0237
英文摘要	Trade-off between nutrient uptake rate and product accumulation has been found among species characterized as acquisitive and conservative strategies in resource utilization. However, long-term grazing causes changes in soil nutrient availability and plant species abundance by selective foraging and resource allocation between above- and belowground organs, which may cover up such trade-off. However, little is known whether the trade-off can be observed among species in community without grazing disturbance, and how grazing influences the trade-off. We conducted a N-15 labelling experiment in winter grazing and grazing release alpine meadow communities on the Tibet Plateau. We examined changes in N form uptake of 11 common species and relationship of N chemical uptake rate with aboveground biomass. Grazing release increased soil -N and -N, and increased -N uptake rate in two species and -N uptake rate in three species. Meanwhile, grazing release decreased aboveground biomass of three species and two of them belong to those species' increased N uptake rate. Contrarily, grazing release increased aboveground biomass of four species and none belongs to the changed N uptake rate. Thus, grazing release caused changes of plant nutrient uptake rate and aboveground production in different directions, which explains the negative relationship of N uptake rate with aboveground biomass in ungrazed community. Our results indicate that the increase in nutrient uptake is probably one of the mechanisms for acquisitive species to cope with the raising nutrient availability and/or competition from the conservative dominant grasses after grazing release.
学科主题	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000407855200001
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/44015]
专题	生态系统网络观测与模拟院重点实验室_生态网络实验室
推荐引用方式 GB/T 7714	Guo, Y,Liu, LP,Zheng, LL,et al. Long-term grazing affects relationships between nitrogen form uptake and biomass of alpine meadow plants[J]. PLANT ECOLOGY,2017,218(9):1035-1045.
APA	Guo, Y,Liu, LP,Zheng, LL,Yu, FH,Song, MH,&Zhang, XZ.(2017).Long-term grazing affects relationships between nitrogen form uptake and biomass of alpine meadow plants.PLANT ECOLOGY,218(9),1035-1045.
MLA	Guo, Y,et al."Long-term grazing affects relationships between nitrogen form uptake and biomass of alpine meadow plants".PLANT ECOLOGY 218.9(2017):1035-1045.