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国家自然科学基金(41075085)

作品数:4 被引量:40H指数:3
相关作者:任三学谭凯炎房世波周广胜更多>>
相关机构:中国气象科学研究院中国科学院植物研究所更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划全球变化研究国家重大科学研究计划更多>>
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Response of leaf dark respiration of winter wheat to changes in CO_2 concentration and temperature被引量:1
2013年
Accurate evaluation of dark respiration of plants is important for estimation of the plant carbon budget.The response of leaf dark respiration of winter wheat to changes in CO 2 concentration and temperature was studied,using an open top chamber during 2011-2012,to understand how leaf dark respiration of winter wheat will respond to climate change.The results indicated that leaf dark respiration decreased linearly with increased CO2 concentration.Dark respiration decreased by about 11% under 560 μmol mol-1 CO2 compared with that under 390 μmol mol-1 CO2.Leaf dark respiration showed an exponential relationship with temperature,and the temperature constant(Q10) was close to 2.Moreover,the responses of leaf dark respiration to CO concentration and temperature were independent.A leaf dark respiration model based on CO2 concentration and temperature responses was developed.This model provides a method for estimation of the leaf dark respiration rate of winter wheat under future climate change and guidance for establishment of crop carbon countermeasures.
TAN KaiYanZHOU GuangShengREN SanXue
关键词:二氧化碳浓度小麦叶片CO2浓度增加未来气候变化
冬小麦叶片暗呼吸对CO_2浓度和温度协同作用的响应被引量:6
2013年
植物暗呼吸的准确评估直接影响到植物碳收支估算.为弄清气候变化对冬小麦叶片暗呼吸的影响,采用开顶式气室模拟研究了冬小麦叶片暗呼吸对不同CO2浓度和温度的响应.结果表明,冬小麦叶片暗呼吸速率随CO2浓度升高呈线性下降趋势,560μmolmol1CO2浓度下冬小麦叶片暗呼吸速率较390μmolmol1CO2浓度下平均降低11%.冬小麦叶片暗呼吸速率与温度呈指数关系,暗呼吸温度系数Q10接近于2.冬小麦叶片暗呼吸对温度和CO2浓度的响应是独立的,据此建立了冬小麦叶片暗呼吸对CO2浓度和温度协同作用的响应关系.研究成果可为估算未来气候变化对冬小麦暗呼吸速率的影响,采取科学的碳对策提供依据.
谭凯炎周广胜任三学
关键词:CO2浓度升高温度冬小麦
Responses of Irrigated Winter Wheat Yield in North China to Increased Temperature and Elevated CO2Concentration被引量:4
2015年
North China is one of the main regions of irrigated winter wheat production in China. Climate warming is apparent in this region, especially during the growing season of winter wheat. To understand how the yield of irrigated winter wheat in North China might be affected by climate warming and CO2 concentration enrichment in future, a set of manipulative field experiments was conducted in a site in the North China Plain under increased temperature and elevated CO2 concentration by using open top chambers and infrared radiator heaters. The results indicated that an average temperature increase of 1.7℃ in the growing season with CO2 concentration of 560 μmol mol-1 did not reduce the yield of irrigated winter wheat. The thousand- kernel weight of winter wheat did not change significantly despite improvement in the filling rate, because the increased temperature shortened the duration of grain filling. The number of effective panicles and the grain number per ear of winter wheat did not show significant changes. There was a large increase in the shoot biomass because of the increase in stem number and plant height. Consequently, under the prescribed scenario of asymmetric temperature increases and elevated CO2 concentration, the yield of irrigated winter wheat in North China is not likely to change significantly, but the harvest index of winter wheat is likely to be greatly reduced.
谭凯炎房世波周广胜任三学郭建平
增温对华北冬小麦生产影响的试验研究被引量:30
2012年
为了探索和验证未来地表气温升高对中国冬小麦生产的影响,了解冬小麦生长发育和产量对增温响应的基本特征,在田间条件下采用红外辐射器增温的方法(FATI)对冬小麦全生育期进行昼夜增温处理,分析了增温对冬小麦生长发育和产量构成及其耗水量的影响。结果表明,全生育期增温使冬小麦返青期显著提前,冬后生育阶段整体前移10d以上,全生育期天数减少,但营养生长时间大幅增加,开花至乳熟时间延长,乳熟至成熟时间缩短;在偏冷年份,增温处理保障了小麦的正常分蘖和生长,株高显著提高,有效穗数比对照增加27.4%,籽粒产量比对照大幅增加;在偏暖年份,增温导致小麦穗分化时间延长,穗粒数增加,灌浆中后期遭受高温危害,千粒重显著降低,产量下降;增温致使冬小麦生产耗水量增加。就华北冬小麦而言,冬季及早春一定幅度的升温有利于小麦生产,但增幅过大可能会导致不利结果;而春末夏初升温对小麦生产是不利的。
谭凯炎房世波任三学
关键词:增温冬小麦
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