| Effects of soil water deficit at growing stages on yield formation of double-cropping super indica rice |
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| DOI：10.7606/j.issn.1000-7601.2017.03.03 |
| Key Words: double-cropping super indica rice soil water deficit grain yield |
| Author Name | Affiliation | | QIAN Yin-fei | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | QIU Cai-fei | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | SHAO Cai-hong | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | CHEN Xian-mao | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | GUAN Xian-jiao | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | CHEN Jin | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | XIE Jiang | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | DENG Guo-qiang | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China | | PENG Chun-rui | Soil and Fertilizer & Resources and Environmental Institute, Jiangxi Academy of Agricultural Sciences / Key Laboratory of Crop Ecophysiology and Farming System for the Middle and Lower Reaches of the Yangtze River, Ministry of Agriculture / National Engineering and Technology Research Center for Red Soil Improvement, Nanchang, Jiangxi 330200, China |
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| Abstract: |
| We aimed to investigate the effect of soil water deficit at different growing stages on growth and yield formation of double-cropping super indica rice by pot experiments. The result indicated that soil water deficit had significant effect on plant height of double-cropping super indica rice during the early growing period in particular the jointing-booting stage, with the largest effect on plant height. Early rice decreased by 4.53%～11.1% in plant height, and the late rice 3.09%～10.04%. Plant height was declined with the soil water deficit degree, but that in late growing period had smaller effect. The leaf, ear, root weight and total dry matter accumulation of double-cropping super rice with soil water deficit at different growing period were lower than shallow water irrigation (CK), and the accumulation reduced with the soil water deficit, and root/shoot ratio varied similarly. On the other hand, soil water deficit promoted the growth of the stem and sheath to some extent and showed a compensatory effect. The yield of the double-cropping super indica rice under the soil water deficit was lower than the CK, and it decreased with the soil water deficit. Grain yield was significantly affected by the soil water deficit, with an order of the jointing-booting stage＞effective tillering stage＞heading-florescence stage＞invalid tillering stage＞milky stage for the early rice, while that for the late rice was jointing-booting stage＞heading-florescence stage＞effective tillering stage＞milky stage＞invalid tillering stage. In addition, the effect of soil water deficit on the effective panicle number during effective tiller stage and spike number during jointing-booting stage was the greatest, mainly causing yield reduction. |
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