中国生态农业学报2011，Vol.19Issue(4)：866-871,6.DOI:10.3724/SP.J.1011.2011.00866
气候变暖对甘肃省不同气候类型区主要作物需水量的影响
Impact of warming climate on crop water requirement in Gansu Province
摘要
Abstract
Global wanning is an increasingly worrisome environmental and climatic phenomenon. Global average temperature increased by 0.60-0.70 °C over the last centuray, with an average temperature rise of 0.80~150 °C in China. Northwest China is one of the most sensitive areas to climate change. Temperature (a critical factor of global warming) is often used in an integrated method to calculate crop water demand. In other words, temperature afftects climate change, which in turn affects crop water needs. Crop water requirements in Northwest China is therefore critical in farm water cycle. It is also an important hydraulic and water-saving parameter in agricultural research, planning and design. This study addressed issues such as: the effect of climate change on agricultural water demand in different regions, and current lack of systematic and quantitative data to support crop water requirement research in the face of global wanning. This study analyzed the effects of wanning climate on crop water requirement in Gansu Province under different temperature scenarios {future temperature increases of 1-4 °C). The results showed that the effects of wanning climate on crop water requirement were different for different crops. Warming climate greatly afftected water requirement of winter wheat, followed by spring wheat and maize. When future temperatures rose by 1 -4 °C, water requirement of winter wheat increased by 3.05%~12.90%, which was the equivalent of 13.2-81.2 mm. That of maize increased by 2.49%~l0.80%, the equivalent of 9.9-60.6 mm. Then spring wheat water requirement increased by 2.74%~11.69%, the equivalent of 6.7-40.0 mm. Regional differences were noted in the impact of warming climate on crop water requirement. The impact of warming climate on crop waterrequirement was highest for arid regions, followed by semi-arid regions, and then semi-humid regions. The least effect was for humid regions. When future temperatures rose by 1-4 °C, the temperature scenario caused additional irrigation water requirement of 1 243, 1 302,1 374 and 1 465 million m3 for winter wheat; 794, 832, 878 and 930 million m3 for maize; and 497, 516, 542 and 576 million m3 for spring wheat, respectively. Warming climate worsened water shortage problems in the study area.关键词
气候变暖/温度/作物需水量/气候区/甘肃省Key words
Warming climate/ Temperature/ Crop water requirement/ Climate zone/ Gansu Province分类
管理科学引用本文复制引用
王鹤龄,王润元,张强,牛俊义,吕晓东..气候变暖对甘肃省不同气候类型区主要作物需水量的影响[J].中国生态农业学报,2011,19(4):866-871,6.基金项目
国家科技部气象行业专项(GYHY200806021,GYHY201106029)和甘肃省自然科学基金项目(3ZS061-A25-010)资助 （GYHY200806021,GYHY201106029）
