干旱区生态环境知识资源中心(Arid): 荒漠植物红砂地上和地下生物量分配关系对大气CO

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	荒漠植物红砂地上和地下生物量分配关系对大气CO_2浓度升高及降水量变化的响应
其他题名	Effect of Elevated CO_2 and Precipitation Regimes on Allocation Patterns of Above-and Belowground Biomass of Desert Shrub Reaumuria soongorica
	种培芳; 贾向阳; 田艳丽; 陆文涛
来源期刊	草地学报
ISSN	1007-0435
出版年	2019
卷号	27 期号:6 页码:1537-1544
中文摘要	植物的生物量在各器官中的分配可反映植物对环境的适应性及其生长策略。未来大气CO_2浓度显著升高将引起降水量的变化,而这种变化必将对荒漠植物的生物量分配产生严重影响。本研究以荒漠优势植物红砂(Reaumuriasoongorica) 1年生苗木为试材,采用开顶式CO_2控制气室模拟CO_2浓度变化(350mumol·mol~(-1)和700 mumol·mol~(-1)),研究了降水变化(-30%,0,+30%)及其与CO_2的协同作用对红砂生物量分配及相关生长关系的影响。结果表明:CO_2浓度升高对不同降水量下红砂地上和地下生物量均具有显著的促进作用(P<0.05);降水减少,红砂生物量向地下分配的比例增加,但CO_2增加会减弱这一作用;CO_2浓度升高和降水变化通过影响红砂地上和地下器官的相对生长来影响生物量在不同器官中的分配,6种处理下的红砂地上地下生物量分配斜率与1.0差异不显著,其相对生长关系均表现为等速生长。未来大气CO_2浓度升高及降水变化下,红砂生物量分配模式对环境变化的响应在一定程度上支持了最优分配假说。
英文摘要	Biomass reflects the accumulation energy in plant,and the variation of biomass among various organs is determined by the growth strategies and the adaptability of plants to environment.Atmospheric CO_2 concentrations had increased from approximately 350mumol·mol~(-1) today to over 700mumo·mol~(-1) in the late 21 th century and this is likely to have profound effects on the precipitation.This change would seriously affect on the above-and below-ground biomass allocation of desert plant.A pot experiment was conducted to study the interaction of elevated CO_2 concentration and changing precipitation on biomass of Reaumuria soongorica,which is a dominant in the arid region of China.The biomass allocation and isometric relationship were investigated in this study.The main plot was two CO_2 concentrations(350 and 700 umol·mol~(-1))and three precipitation levels[natural precipitation as control(0),precipitation minus 30% (30%),precipitation plus 30%(+30%).The results showed that elevated CO_2 stimulated the increase of above-and below-ground biomass of R.soongorica under three precipitation conditions(P<0.05). The ratio of below-ground biomass allocation was increased with the decrease of precipitation,and CO_2 fattening weakened this effect.Elevated CO_2 concentration and changed precipitation could change biomass among various organs through affecting the relative growth of above-and below- ground organs in R. soongorica,the slopes of the fitted equations at six treatments were not different from 1,which means the allocation patterns between above-and below-ground biomass were similar at six treatments and indicates an isometric allocation relationship between above-and below-ground biomass(P>0.05).With the elevated CO_2 concentration and changed precipitation in the future,responding of allocation patterns in above-and below- ground biomass of R.soongoricato climate changing partially support the optimal partitioning theory.
中文关键词	CO_2浓度升高 ; 降水量变化 ; 生物量分配 ; 等速生长 ; 红砂
英文关键词	Elevated CO_2 concentration Precipitation Biomass allocation Isometric relationship Reaumuria soongorica
语种	中文
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6633549
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315913
作者单位	甘肃农业大学林学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	种培芳,贾向阳,田艳丽,等. 荒漠植物红砂地上和地下生物量分配关系对大气CO_2浓度升高及降水量变化的响应[J]. 甘肃农业大学,2019,27(6):1537-1544.
APA	种培芳,贾向阳,田艳丽,&陆文涛.(2019).荒漠植物红砂地上和地下生物量分配关系对大气CO_2浓度升高及降水量变化的响应.草地学报,27(6),1537-1544.
MLA	种培芳,et al."荒漠植物红砂地上和地下生物量分配关系对大气CO_2浓度升高及降水量变化的响应".草地学报 27.6(2019):1537-1544.