| Analysis of soil water characteristics of farmland under different winter storage irrigation in Hexi Region of Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2009.04.02 |
| Key Words: winter storage irrigation soil water distribution spring wheat Hexi Region irrigation ration |
| Author Name | Affiliation | | YANG Wei | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Fucang | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China | | CHEN Jingjing | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The soil water characteristics of farmland under different winter storage irrigation in Hexi Region of Gansu Province were analyzed. The results showed that profile soil water distribution of farmland was mostly in 140～160 cm layers with the treatment of 180 mm winter storage irrigation ration, and the soil water content of the layer was above 30%, easy to occur leakage in the deep soil layer. In the relative small ration of storage irrigation, profile soil water distribution of farmland was mostly in 0～100 cm layers, unlikely to occur leakage in the deep soil layer. There was large invalidation soil water evaporation with the higher ration of the winter storage irrigation. In same winter storage irrigation ration, the more irrigation ration in wheat growth period, the more soil water content and deeper layer soil water distribution and deeper soil water leakage occur. In same irrigation ration of experimental period, comparatively with winter storage irrigation, the large ration crop period irrigation treatment had a soil water distribution in 0～100 cm soil layer, and the results also showed no soil water leakage occurrence. In the same total irrigation ration of experimental period, there was a water deficit in 0～200 cm soil layer with the treatment of large volume shortage irrigation. It had showed that there was a higher evapotranspiration occurrence when having a higher winter storage irrigation ration or larger irrigation ration in growth period. With the appropriate storage irrigation ration, it could not only better crop growth but also increase irrigation water use efficiency. |
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