干旱区生态环境知识资源中心(Arid): 不同土壤水分条件下文冠果的光合作用日变化

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	不同土壤水分条件下文冠果的光合作用日变化
其他题名	Photosynthesis Diurnal Variation of Xanthoceras sorbifolia Bunge under Different Soil Water Conditions
	程甜甜; 张光灿; 张淑勇; 艾钊; 张永涛
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2016
卷号	36 期号:9 页码:1828-1835
中文摘要	在黄土丘陵区,以3年生文冠果苗木为材料,测定其在不同土壤水分条件下的气体交换和荧光参数日变化,分析其光合作用与不同土壤水分的定量关系,以指导文冠果这一能源树种在半干旱地区的推广种植。结果表明:(1)文冠果叶片的净光合速率(P_n)、水分利用效率(WUE)、光下最大荧光(F_m)、PSⅡ最大光量子产量(F_v/F_m)、 PSⅡ实际量子效率(Phi_(PSⅡ))、光化学猝灭系数(qP)均随土壤相对含水量(W_r)降低呈先升高后降低趋势,其最小荧光(F_o)先降后升,而其NPQ持续升高,当W_r为44.7%~81.2%时各参数都维持在较高水平。(2)文冠果叶片日净光合累计量(P_D)和WUE在W_r为58.6%~81.2%时都处于较高水平,当W_r为66.6%时WUE达到最大值,过高或过低的土壤水分含量均不利于文冠果叶片光合作用的进行和水分的利用。(3)气体交换参数分析表明,文冠果中午光合作用的下降在W_r为38.1%~81.2%时是由气孔因素导致,而在W_r低于31.8%时转为非气孔限制;当W_r低于73.9%时,文冠果中午会出现光抑制,光合机构受到破坏。研究认为,在黄土丘陵区,适宜文冠果栽培的土壤相对含水量在58.6%~81.2%之间,低于38.1%时则无法正常生长。
英文摘要	In order to promote the planting of Xanthoceras sorbifolia Bunge in Semi-arid area,this study took 3-year-old seedlings of X.sorbifolia Bunge as materials in Loess Hilly Region in which its gas exchange and diurnal variation of chlorophyll fluorescence parameters under different moisture conditions were measured and the quantitative relationship between photosynthesis and different soil moisture was analyzed.The results indicated that:(1)with the decrease of relative soil water content,the net photosynthetic(Pn),water use efficiency(WUE),maximal fluorescence under light(F_m),PSⅡ maximum light quantum yield(F_v/F_m),PSⅡ practical quantum efficiency(Phi_(PSⅡ))and photochemical quenching(qP)increased at first and then decreased,minimum fluorescence(F_o)decreased first and then increased,and NPQ continued to rise.All parameters were maintained at a higher level when Wrwas 44.7%-81.2%.(2)The daily net photosynthetic accumulation and water use efficiency(WUE)were at a higher level while Wrwas at 58.6%-81.2%.WUE reached the maximum value when Wrwas 66.6%.It is not favorable to the photosynthesis and water utilization of X.sorbifolia Bunge when the soil water content was too high or too low.(3)Gas exchange data showed that the decline of photosynthesis at noon was caused by stomatal factor when Wrwas at 38.1%-81.2%,but it was restricted to non-stomatal factor when W_r was less than 31.8%.There would be photo inhibition at noon and it would damage the photosynthetic mechanism while W_r was less than 73.9%.In short,it is suitable for the cultivation of X.sorbifolia Bunge in Loess Hilly Region while Wrwas at 58.6%-81.2%and it cannot grow normally while Wrwas less than 38.1%.
中文关键词	文冠果 ; 干旱胁迫 ; 气体交换 ; 叶绿素荧光 ; 日变化
英文关键词	Xanthoceras sorbifolia Bunge drought stress gas exchange chlorophyll fluorescence diurnal variation
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5822464
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235158
作者单位	程甜甜, 山东农业大学林学院, 泰安, 山东 271018, 中国.; 张光灿, 山东农业大学林学院, 泰安, 山东 271018, 中国.; 张淑勇, 山东农业大学林学院, 泰安, 山东 271018, 中国.; 艾钊, 山东农业大学林学院, 泰安, 山东 271018, 中国.; 张永涛, 山东农业大学林学院, 泰安, 山东 271018, 中国.
推荐引用方式 GB/T 7714	程甜甜,张光灿,张淑勇,等. 不同土壤水分条件下文冠果的光合作用日变化[J],2016,36(9):1828-1835.
APA	程甜甜,张光灿,张淑勇,艾钊,&张永涛.(2016).不同土壤水分条件下文冠果的光合作用日变化.西北植物学报,36(9),1828-1835.
MLA	程甜甜,et al."不同土壤水分条件下文冠果的光合作用日变化".西北植物学报 36.9(2016):1828-1835.