| Effect of water-controlled irrigation on dry matter production, filling dynamics and yield of rice in cold region |
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| DOI：10.7606/j.issn.1000-7601.2011.05.22 |
| Key Words: water-controlled irrigation rice in cold region dry matter production filling dynamics yield |
| Author Name | Affiliation | | LV Yandong | Rice Institute of Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Key Laboratory of Northern Japonica Rice Breeding of Liaoning, Shenyang, Liaoning 110161, China
College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | ZHENG Guiping | College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | GUO Xiaohong | College of Agronomy, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | YIN Dawei | Rice Institute of Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Key Laboratory of Northern Japonica Rice Breeding of Liaoning, Shenyang, Liaoning 110161, China | | SONG Jinli | The Organization Department of the Longzhen Farm, Wudalianchi, Heilongjiang 164135, China | | MA Dianrong | Rice Institute of Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Key Laboratory of Northern Japonica Rice Breeding of Liaoning, Shenyang, Liaoning 110161, China | | XU Zhengjin | Rice Institute of Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Key Laboratory of Northern Japonica Rice Breeding of Liaoning, Shenyang, Liaoning 110161, China | | CHEN Wenfu | Rice Institute of Shenyang Agricultural University, Shenyang, Liaoning 110161, China
Key Laboratory of Northern Japonica Rice Breeding of Liaoning, Shenyang, Liaoning 110161, China |
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| Abstract: |
| With Kenjiandao 5 as material, the effects of intermittent controlling water treatments at -8～-10 kPa of soil water potential from re-green to mature on dry matter production, filling dynamics and yield of rice in cold region were studied with potted planting in chamber rainproof by examining soil water potential with negative pressure soil moisture tensiometer. The main results are as follows: Panicles per hill of treatment cultivar decreased 1.54%; grain numbers per panicle increased 3.93%; kernel seting rate of superior grains, middle grains and inferior grains increased 3.53%, 12.77% and 28.97% respectively; 1000-grain weight of superior grains, middle grains and inferior grains increased 0.96%、0.48% and 0.60% respectively; biomass increased 8.27%; harvest indexs increased 5.73%; economic yield increased 14.47% under the condition of controlling-water treatment. Dry weight of reatment cultivar was higher than its of the CK from anthesis to mature; exportation percentage and transformation percentage of dry matter in sheath increased 6.21% and 7.77% respectively under the condition of controlling-water treatment. The process of grain filling of treatment cultivar was accelerated; grain filling rate peak appearing time of inferior grains of treatment cultivar was delayed; G,Gmax, I and Wmax.G of superior grains, middle grains and inferior grains was raised respectively; the growing period of treatment cultivar were shorten under the condition of controlling-water treatment. |
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