增温对宁夏引黄灌区春小麦生产的影响
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宁夏大学 新技术应用研究开发中心,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,宁夏大学 新技术应用研究开发中心,宁夏大学 新技术应用研究开发中心,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

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国家公益性(气象)行业科研专项(GYHY200806021-05);教育部新世纪优秀人才项目(NCET-09-0859);国家自然科学基金重点项目(40830957)


The impact of rising temperature on spring wheat production in the Yellow River irrigation region of Ningxia
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New Technology Application,Research and Development Center,Ningxia University,Yinchuan,Ningxia,Institute of Arid Meteorology,China Meteorological Administration,Gansu Key Laboratory of Arid Climate Changes and Disaster Reduction,Lanzhou,New Technology Application,Research and Development Center,Ningxia University,Yinchuan,Ningxia,New Technology Application,Research and Development Center,Ningxia University,Yinchuan,Ningxia,Institute of Arid Meteorology,China Meteorological Administration,Gansu Key Laboratory of Arid Climate Changes and Disaster Reduction,Lanzhou

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    摘要:

    近40a来,宁夏引黄灌区年平均增温幅度高于全国平均值,对春小麦生产已经产生了重大影响。基于哥本哈根联合国气候变化大会控制未来50 a全球升温幅度的范围值,设计增温幅度为0.5-2.5 ℃,采用红外线辐射器大田增温模拟实验,研究增温对宁夏引黄灌区春小麦生长发育和产量的影响。结果表明:增温0.5-2.5 ℃,宁夏引黄灌区春小麦全生育期(播种-收获)缩短1-22 d,减产0.5%-18.5%;增温2.0-2.5 ℃,春小麦全生育期缩短18-22 d,减产16.5%-18.5%。增温引起春小麦三叶期和孕穗期光合速率下降,穗粒数减少,千粒重下降,最终导致减产。

    Abstract:

    For more than 40 years, the annual average warming rate in the Yellow River irrigation area of Ningxia has been higher than the Chinese average rate, which has caused a significant impact on spring wheat production in the region. Based on the projected increase in global temperature over the next 50 years, this study was conducted to investigate the impact of an increase in temperature of 0.5-2.5℃. To accomplish this, a field experiment employing infrared radiators to increase the temperature was conducted and the effects on the growth and development of spring wheat in the yellow river irrigation area of Ningxia were investigated. When mean daily temperature increased by 2.0-2.5 ℃, the growth period decreased by 18-22 d, and the yield was reduced by 16.5%-18.5%. Temperature is generally conducive to crop photosynthesis; however, if the temperature is too high, it will inhibit photosynthesis, thereby affecting crop growth and development. In addition, higher temperatures are associated with increased transpiration, which also affects spring wheat growth and development. Warming also led to a significant increase in the transpiration rate during the three leaf stage, as well as a significant decrease in the photosynthetic rate. The three leaf stage of spring wheat is when spike differentiation occurs; accordingly, a decrease in the photosynthetic rate during this period could influence the grain number. In the booting stage, warming led to a decreased photosynthetic rate, which in turn led to decreased dry matter accumulation of grain weight, and ultimately influenced the output. Based on these findings, it is recommended that drought-resistant varieties and cultivation techniques, including, irrigation, fertilization, and pest control methods, be adopted in Ningxia in anticipation of climate change.

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肖国举,张强,张峰举,罗成科,王润元.增温对宁夏引黄灌区春小麦生产的影响.生态学报,2011,31(21):6588~6593

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