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Differences in the impacts of nighttime warming on crop growth of rice-based cropping systems under field conditions

文献类型： 外文期刊

作者： Chen, Jin 1 ; Chen, Changing 2 ; Tian, Yunlu 2 ; Zhang, Xin 3 ; Dong, Wenjun; Zhang, Bin; Zhang, Jun 3 ; Zheng, Che 1 ;

作者机构： 1.Jiangxi Acad Agr Sci, Minist Agr, Key Lab Crop Ecophysiol & Farming Syst Middle & L, Soil & Fertilizer & Resources & Environm Inst, Nanchang 330200, Peoples R China

2.Nanjing Agr Univ, Inst Appl Ecol, Nanjing 210095, Jiangsu, Peoples R China

3.Chinese Acad Agr Sci, Key Lab Crop Physiol & Ecol, Minist Agr, Inst Crop Sci, Beijing 100081, Peoples R China

4.Chinese Acad Agr Sci, Key Lab Crop Physiol & Ecol, Minist Agr, Inst Crop Sci, Beijing 100081, Pe

关键词： Global warming;Food security;Rice cropping system;Grain yield;Crop phenophase;Field experiment

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.124； 五年影响因子：5.567 ）

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收录情况： SCI

摘要： Great attentions have been taken to the effects of climatic warming on crop production, however, fewer were known about the actual impacts of nighttime warming under different cropping systems. Therefore, a three-year field experiment with a passive nighttime warming (PNW) facility and a one-year field experiment with free air temperature increase (FATI) facility were conducted in major Chinese rice cropping systems. Four-year field observations from different rice cropping systems all showed that nighttime warming less than 1.0 degrees C could shorten the length of crop pre-flowering phase period while prolonged the length of post-flowering phase period, resulting in insignificant reduction in the length of crop entire growth period. The temperature increase caused significant increments in grain yields by 16.2, 12.7 and 12.0% for late rice in the rice-rice cropping system, wheat in the rice-wheat cropping system and rice in the single rice cropping system, respectively. However, this warming declined grain yields significantly by 4.5 and 6.5% for early rice in the rice-rice cropping system and rice in the rice-wheat cropping system, respectively. Since warming-induced yield reduction was less than warming-induced increment in each cropping system, the annual yields was higher in the warmed plots than the non-warmed under all systems. Our findings can provide important references to cropping system adjustment for coping with global warming in China and other regions. (C) 2016 Elsevier B.V. All rights reserved.

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