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Irrigation management effects on yield and water productivity of hybrid, inbred and aerobic rice varieties in China
| Content Provider | Semantic Scholar |
|---|---|
| Author | Cabangon, Romeo Tường, Tô Phúc Lu, Guoan Bouman, Bas A. M. Feng, Yuehua Zhichuan, Zhao Chen, Chun-Yin Doris Wang, Jinn Chyi |
| Copyright Year | 2003 |
| Abstract | The objective of this study was to compare the effects of different water saving irrigation regimes on yield, irrigation input and water productivity of aerobic (high yielding rice variety that can be grown in non-puddled soil without flooding) and lowland (hybrid and inbred) rice varieties in different water table conditions. Experiments were carried out in Tuanlin, Hubei Province and in Huibei, Henan Province in China in 2001 and 2002. The tested water treatments were continuous flooding (CF), alternate wetting and drying (A WD), flush irrigation (FI) with different threshold soil water potentials (at which irrigation was applied) of -10, -30, and -70 kPa and partially rainfed (PRF). The varieties used were hybrid 2you72S (Tuanlin) or inbred 90247 (Huibei), and aerobic rice HD502 (both sites). The tested aerobic variety yielded satisfactory in Huibei, its yield was however significantly less than the lowland varieties. But in Tuanlin, it suffered heavy stem borer infestation in 2001 and by high spikelet sterility in 2002. The response of yield, and water productivity to irrigation regimes depended on the depth of the groundwater. Rice yields did not differ significantly among water treatments when the water table was shallow. When the water table was deep (Huibei, 2002), yield declined with decreasing threshold soil water potentials, especially with the lowland variety. CF had the highest irrigation water inputs, followed by AWD and FI. Among the FJ treatments in 2002, water input declined , , ,. sharply when the threshold soil water potentials were reduced from -10 to -70 kPa. !j~ Treatments with lower threshold soil water potentials had significantly higher water productivities than that at -10 kPa. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://publications.iwmi.org/pdf/H033346.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
