Journal of Arid Meteorology ›› 2021, Vol. 39 ›› Issue (5): 734-741.DOI: 10.11755/j.issn.1006-7639(2021)-05-0734

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Effect of Continuous Drought Stress During Critical Period of Water on Photosynthetic Physiology and Yield Formation of Summer Maize

ZHANG Jibo1,2(),LI Nan1,2,QIU Can2,3,XUE Xiaoping1,2()   

  1. 1. Key Laboratory for Meteorological Disaster Prevention and Mitigation of Shandong, Jinan 250031, China
    2. Shandong Provincial Climate Center, Jinan 250031, China
    3. Department of Geography, Shanghai Normal University, Shanghai 200234, China
  • Received:2021-04-29 Revised:2021-08-15 Online:2021-10-30 Published:2021-11-08
  • Contact: Xiaoping XUE



  1. 1.山东省气象防灾减灾重点实验室,山东 济南 250031
    2.山东省气候中心,山东 济南 250031
    3.上海师范大学地理系,上海 200234
  • 通讯作者: 薛晓萍
  • 作者简介:张继波(1987— ),男,高级工程师,主要从事农业气象服务及研究. E-mail:
  • 基金资助:


The experiment was conducted during the growth season of summer maize in 2018 in moisture control field of automatic control rain shelter in agriculture meteorological test station of Linyi. With ‘Zhengdan 958’ (ZD958) as test material, five-gradient water control tests were designed during the critical period of water (jointing to blooming stage). The effects of continuous drought stress on photosynthetic physiology and yield formation of summer maize in the critical period of water were simulated and studied. The results show that the leave chlorophyll a content, net photosynthetic rate, stomatal conductance, transpiration rate and plant height, leaf area, total dry weight above ground parts of summer maize at the flowering stage decreased under continuous drought stress during the water critical period, and the heavier drought stress was, the greater reduction was. The above elements under T5 treatment were 42.6%, 75.5%, 83.2%, 65.1%, 27.5%, 18.2% and 44.9% lower than those under T1 treatment in turn. The water use efficiency of summer maize leaves increased firstly and then decreased with the intensification of drought stress, and it reached the highest under light drought stress. Under continuous drought stress, the nutrient allocation of maize leaves and sheaths increased, while the nutrient supply of stems, fruits and roots decreased, which wasn’t conducive to healthy growth of summer maize, the risk of lodging increased, and the yield formation was difficult. In addition, the continuous drought stress also caused increase of bald tip ratio and double spike rate of summer maize and significant decrease of 100-kernel weight and theoretical yield.

Key words: critical period of water, continuous drought stress, photosynthetic physiology, yield, summer maize



关键词: 水分临界期, 持续干旱胁迫, 光合生理, 产量, 夏玉米

CLC Number: