干旱区生态环境知识资源中心(Arid): Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China

Arid

	Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China
	Shan Lishan; Zhao Wenzhi; Li Yi; Zhang Zhengzhong; Xie Tingting
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:4 页码:574-587
英文摘要	Climate change is shifting the amount and frequency of precipitation in many regions,which is expected to affect seedling recruitment across ecosystems.However,the combined effects of precipitation amount and frequency on seedling recruitment remain largely unknown.An understanding of the effects of precipitation amount and frequency and their interaction on seedling emergence and growth of typical desert plants is vital for managing populations of desert plants.We conducted two experiments to study the effects of variation in precipitation on Reaumuria soongarica(Pall.) Maxim.First,greenhouse experiments were conducted to examine the effects of three precipitation amount treatments(ambient,+30%,and -30%) and two precipitation frequency treatments(ambient and -50%) on seedling emergence.Second,the morphological responses of R.soongarica to changes in precipitation amount and frequency were tested in a controlled field experiment.Stage-specific changes in growth were monitored by sampling in different growth seasons.Our results showed that precipitation amount significantly affected germination,seedling emergence,and growth of R.soongarica,and there was a larger effect with decreased precipitation frequency compared with ambient.Germination and seedling emergence increased as precipitation increased under the same frequency of precipitation.The highest emergence percentage was obtained with a 30% increase in precipitation amount and a 50% reduction in precipitation frequency.Compared with ambient precipitation,a 30% increase in precipitation amount increased above-and below-ground biomass accumulation of R.soongarica during the growth season.A decrease of 30% in precipitation amount also resulted in an increase in below-ground biomass and root/shoot ratio in the early stages of the growth season,however,above-and below-ground biomass showed the opposite results at the end of the growth season,with larger effects on above-ground than below-ground biomass under decreased precipitation frequency.When precipitation frequency decreased by 50%,values of all growth traits increased for a given amount of precipitation.We concluded that precipitation frequency may be as important as precipitation amount to seedling emergence and growth of R.soongarica,and that understanding the effects of precipitation variability on seedling recruitment requires the integration of both precipitation amount and frequency.In particular,the combination of a 30% increase in precipitation amount and 50% reduction in precipitation frequency increased the emergence and growth of seedlings,suggesting that alteration of amount and frequency of precipitation caused by climate change may have significant effects on seedling recruitment of R.soongarica.
英文关键词	precipitation patterns seedling emergence biomass root/shoot ratio seedling recruitment
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6283199
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335979
作者单位	Shan Lishan, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;;College of Forestry,Gansu Agricultural University, ;;, Lanzhou;;Lanzhou, ;; 730000;;730070.; Zhao Wenzhi, Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Li Yi, College of Forestry,Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Zhang Zhengzhong, College of Forestry,Gansu Agricultural University, Lanzhou, Gansu 730070, China.; Xie Tingting, College of Forestry,Gansu Agricultural University, Lanzhou, Gansu 730070, China.
推荐引用方式 GB/T 7714	Shan Lishan,Zhao Wenzhi,Li Yi,et al. Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China[J],2018,10(4):574-587.
APA	Shan Lishan,Zhao Wenzhi,Li Yi,Zhang Zhengzhong,&Xie Tingting.(2018).Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China.Journal of Arid Land,10(4),574-587.
MLA	Shan Lishan,et al."Precipitation amount and frequency affect seedling emergence and growth of Reaumuria soongarica in northwestern China".Journal of Arid Land 10.4(2018):574-587.