干旱区生态环境知识资源中心(Arid): CO_2浓度升高对半干旱区春小麦光合作用及水分生理生态特性的影响

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	CO_2浓度升高对半干旱区春小麦光合作用及水分生理生态特性的影响
其他题名	Effects of Elevated CO_2 Concentration on the Characteristics of Photosynthesis and Water Physiological-ecological of Spring Wheat in Semi-arid Area in China
	张凯; 张勃; 王润元; 王鹤龄; 赵鸿; 赵福年; 齐月; 陈斐
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2021
卷号	30 期号:2 页码:1674-5906
中文摘要	大气CO_2浓度升高已成为世界范围内重要环境问题。为了解大气CO_2浓度升高对春小麦光合作用及水分生理生态特性的影响,在典型半干旱区定西利用开顶式气室(OTC)试验平台,以春小麦定西24号为供试品种,开展了CO_2浓度增加模拟试验。试验设对照(390 mumol·mol~(-1))、480 mumol·mol~(-1)和570 mumol·mol~(-1)等3个CO_2浓度(摩尔分数)梯度。结果表明:在对照和增加CO_2浓度条件下,春小麦叶片净光合速率和蒸腾速率日变化均呈双峰型分布,出现明显的午休现象;胞间CO_2浓度的日变化表现为斜V字型曲线;叶水势日变化呈现反抛物线曲线走向,在中午后出现水势曲线拐点。在不同生育时期内,净光合速率、气孔导度和胞间CO_2浓度均表现为开花期最大,乳熟期最小。而蒸腾速率表现为开花期最大,拔节期最小,叶片水平水分利用效率表现为孕穗期最大,乳熟期最小。随着CO_2浓度升高,春小麦叶片净光合速率、胞间CO_2浓度、水分利用效率和水势提高,气孔导度和蒸腾速率降低。与对照大气CO_2浓度相比,在480 mumol·mol~(-1)浓度和570 mumol·mol~(-1)浓度下,整个生育期净光合速率平均分别提高了14.68%和28.20%,气孔导度平均降低了15.29%和24.83%,胞间CO_2浓度平均提高了10.38%和26.15%,蒸腾速率平均减小了6.63%和12.41%,WUE平均增加了22.9%和46.9%。随着CO_2浓度升高,蒸腾失水减少,叶片水势不断增加,从而增强了春小麦对干旱胁迫的抵御能力。研究结果为我国半干旱区春小麦对全球气候变化下的敏感性及适应性提供理论参考。
英文摘要	The increase of atmospheric CO_2 concentration has become an important environmental problem worldwide. In the present study, the effects of elevated CO_2 concentration on the characteristics of photosynthesis and water physiological-ecological of spring wheat (Dingxi 24#) were investigated based on the Open-Top Chamber (OTC) experiment platform in Dingxi which was located in semi-arid area of the loess plateau in central Gansu. Three different CO_2 concentrations experiments (390 mumol·mol~(-1), 480 mumol·mol~(-1) and 570 mumol·mol~(-1)) were involved. The results showed that under ambient air CO_2 concentration and elevated CO_2 concentration levels, the diurnal variation of net photosynthetic rate (Pn) and transpiration rate (Tr) in spring wheat leaves presented a two peaks curve, significant midday depression of photosynthesis and transpiration was appeared, the diurnal variation of internal CO_2 concentration (Ci) in spring wheat leaves appeared V shape, and the diurnal variation of leaf water potential presented the trend of the anti-parabolic curve, the inflection point of the water potential curve appeared after noon. At different growth stages, Pn, stomatal conductance (Cs) and Ci were the highest at flowering stage and the lowest at milk stage. Tr was the highest at flowering stage and the lowest at jointing stage. Water use efficiency (WUE) was the highest at booting stage and the lowest at milk stage. Pn, Ci, WUE and water potential increased but Cs and Tr decreased with the increase of CO_2 concentration. Under 480 mumol·mol~(-1) and 570 mumol·mol~(-1), the average of Pn increased by 14.68% and 28.20% respectively, the Cs decreased by 15.29% and 24.83%, the Ci increased by 10.38% and 26.15%, the Tr decreased averagely by 6.63% and 12.41%, and WUE increased by 22.9% and 46.9% in the whole growth period compared to the ambient air CO_2 concentration. With the increase of CO_2 concentration, the loss water induced by transpiration decreased and leaf water potential increased, which enhanced the resistance of spring wheat to drought stress. Our results provide a theoretical reference for the sensitivity and adaptability of the spring wheat in the semi-arid area of China under the global climate change scenarios.
中文关键词	CO_2升高 ; 光合特性 ; 水分利用效率 ; 水势 ; 春小麦 ; 半干旱区
英文关键词	elevated CO_2 concentration photosynthetic characteristics water use efficiency leaf water potential spring wheat semi-arid area
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6947190
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354396
作者单位	张凯, 西北师范大学地理与环境科学学院;;中国气象局兰州干旱气象研究所;;中国气象局定西干旱气象与生态环境野外科学试验基地, ;;甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室;;, 兰州;;兰州;;定西, 甘肃;;甘肃;;甘肃 730070;;730020;;743000, 中国.; 张勃, 西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国.; 王润元, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.; 王鹤龄, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.; 赵鸿, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.; 赵福年, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.; 齐月, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.; 陈斐, 中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点实验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国.
推荐引用方式 GB/T 7714	张凯,张勃,王润元,等. CO_2浓度升高对半干旱区春小麦光合作用及水分生理生态特性的影响[J],2021,30(2):1674-5906.
APA	张凯.,张勃.,王润元.,王鹤龄.,赵鸿.,...&陈斐.(2021).CO_2浓度升高对半干旱区春小麦光合作用及水分生理生态特性的影响.生态环境学报,30(2),1674-5906.
MLA	张凯,et al."CO_2浓度升高对半干旱区春小麦光合作用及水分生理生态特性的影响".生态环境学报 30.2(2021):1674-5906.