title: Response of bean cultures' water use efficiency against climate warming in semiarid regions of China.
abstract: Farm crop growing and high efficiency water resource utilizing are directly influenced by global warming, and a new challenge will be given to food and water resource security. A simulation experiment by farm warming with infrared ray radiator was carried out, and the result showed photosynthesis of broad bean was significantly faster than transpiration during the seedling stage, ramifying stage, budding stage, blooming stage and podding stage when the temperate was increased by 0.5-1.5 °C. But broad bean transpiration was faster than photosynthesis during the budding stage, blooming stage and podding stage when the temperature was increased by 1.5 °C above. The number of grain per hill and hundred-grain weight were significantly increased when the temperature was increased by 0.5-1.0 °C. But they significantly dropped and finally the yield decreased when the temperature was increased by 1.0 °C above. The broad bean yield decreased by 39.2-88.4% when the temperature was increased by 1.5-2.0 °C. The broad bean water use efficiency increased and then decreased with temperature rising. The water use efficiency increased when the temperature was increased by 1.0 °C below, and it quickly decreased when the temperature was increased by 1.0 °C above. In all, global warming in the future will significantly influence the growth, yield and water use efficiency of bean cultures in China's semiarid regions.
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Guoju
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Fengju
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Huang
authors.initials: H
authors.lastname: Juying
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Luo
authors.initials: L
authors.lastname: Chengke
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Jing
authors.affiliation: New Technology Application R&D Center of Ningxia University, Yinchuan, Ningxia 750021, China.
authors.forename: Ma
authors.initials: M
authors.lastname: Fei
authors.affiliation: Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province, Lanzhou, Gansu 730020, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Yubi
authors.affiliation: Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Disaster Reduction of Gansu Province, Lanzhou, Gansu 730020, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Runyuan
authors.affiliation: Ningxia Liupanshan Flower Research Institute, Longde, Ningxia 756300, China.
authors.forename: Qiu
authors.initials: Q
authors.lastname: Zhengji
keywords: Broad bean; Climate change; Semiarid regions; Water use efficiency; Yield