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Chinese Journal of Applied Ecology ›› 2017, Vol. 28 ›› Issue (12): 3935-3944.doi: 10.13287/j.1001-9332.201712.030

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Effects of different irrigation treatments during heading and flowering stage on cold resis-tance, yield and physiological characteristics of late rice

CAO Na1,2, CHEN Xiao-rong1*, HE Hao-hua1, ZHU Chang-lan1,CAI Shuo2, XU Tao2, XIE Heng-wang2, LIU Fang-ping2   

  1. 1College of Agronomy, Jiangxi Agricultural University/Ministry of Education Key Laboratory of Crop Physiology, Ecology and Genetic Breeding/Jiangxi ProvinceResearch Center of Super Rice Engineering and Technology/Collaboration Center for Double-season Rice Modernization Production, Nanchang 330045, China
    2Jiangxi Provincial Station Center of Irrigation Experiment, Nanchang 330201, China
  • Received:2017-01-17 Online:2017-12-18 Published:2017-12-18
  • Contact: * E-mail: ccxxrr80@163.com
  • Supported by:

    This work was supported by the Special Project for Scientific Research in the Public Interest Research (Meteorology) (GYHY201406025) and Special Fund for Agro-scientific Research in the Public Interest (201403002) and Jiangxi Agricultural University Graduate Student Innovation Fund (NDYC2015-S004)

Abstract: Taking super hybrid rice variety ‘Wufengyou T025’ as test material, the effects of different irrigation methods and water layer depth on physiological characteristics and yield in double-season late rice under low temperature conditions during heading and flowering stage were investigated. Three treatments were set, i.e., draining during day and containing 4-5 cm water layer during night (H1), draining during day and containing 8-10 cm water layer during night (H2), and containing 8-10 cm water layer day and night (H3), with the 0-1 cm water layer day and night was as the control (CK). The results showed that rice leaf temperature, soil layer temperature and canopy temperature under the different irrigation treatments were higher than that of CK, and the warming effect of treatment H2 was the best during the low temperature period. Leaf chlorophyll content, net photosynthetic rate, transpiration rate, leaf stomatal conductance and intercellular CO2 concentration of rice plants decreased gradually under the low temperature, while the smallest reduction occurred in H2. The increase ranges of malondialdehyde and proline content in H2 were lower, while its soluble protein content was the highest compared with other irrigation treatments. The increase ranges for the activities of superoxide dismutase and peroxidase in H2 were lower, while its decrease range for the activity of catalase was the lowest. Irrigation for heat preservation could increase the yield, and H2 performed best. Yield of H2 at the second sowing date in 2014 and 2015 encountering low temperature increased by 12.9% and 13.5% respectively compared to CK. The yield components including the effective panicle numbers per plant, panicle length, seed setting rate and 1000-grain mass were improved in all irrigation treatments compared to CK. Draining during day and containing 8-10 cm water layer during night (H2) was the most effective agronomic measure to enhance the tolerance to low temperature during heading and flowering stage for double-season hybrid late rice.