| The changing law of the diurnal evapotranspiration and soil evaporation in cotton field of Tarim irrigation area |
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| DOI：10.7606/j.issn.1000-7601.2012.06.12 |
| Key Words: cotton evapotranspiration soil evaporation Tarim irrigation area |
| Author Name | Affiliation | | WANG Xingfan | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences(CAS), Urumqi 830011
Graduate University of Chinese Academy of Sciences, Beijing 100083, China | | HU Shunjun | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences(CAS), Urumqi 830011 | | TIAN Changyan | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences(CAS), Urumqi 830011 | | LUO Yi | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences(CAS), Urumqi 830011
Graduate University of Chinese Academy of Sciences, Beijing 100083, China |
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| Abstract: |
| In order to provide a scientific theoretical basis for reasonable irrigation of cotton in Tarim irrigation area, and based on soil moisture, precipitation, irrigation and other data observed at Aksu National Field Research Station of Agro-ecosystem in Xinjiang, evapotranspiration is calculated by using water balance method, evaporation is monitored by using self-made Micro-lysimeters, and the changing law and affecting factors are analyzed. The results show that the in-tensity of cotton
evapotranspiration and evaporation increases gradually in seedling, squaring, flowering and bolling stages, reaching its maximum in flowering and bolling stages, and then decreases gradually in boling opening and har-vesting stages. The ratio of evaporation to evapotranspiration of cotton decreases gradually in seeding, squaring and flow-ering and bolling stages, reaching its minimum in flowering and bolling stages,then increases
gradually in boll opening and harvesting stages. All through these stages, the ratio of evaporation to evapotranspiration is about 16.49%. The relative evaporation intensity of cotton shows close relation to surface soil moisture, and it increases with the surface soil moisture. |
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