| Effect of winter wheat yield and WUE with different soil water before sowing in semi-arid areas |
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| DOI：10.7606/j.issn.1000-7601.2010.01.12 |
| Key Words: dry land winter wheat ecotype WUE soil water before sowing |
| Author Name | Affiliation | | LUO Junjie | Institute of Bio-technology, GAAS, Lanzhou, Gansu 730070, China | | WANG Yong | Institute of Dryland Agriculture, GAAS, Lanzhou, Gansu 730070, China | | FAN Tinglu | Department Science and Technology, GAAS, Lanzhou, Gansu 730070, China |
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| Abstract: |
| According to the wheat yield and water use efficiency low and instability in arid of eastern Gansu. The summer fallow coincides with the rainy season and evaporation fastigium, which brings the insufficiency of
soil water storage in East Gansu rain-fed areas. Covering field with plastic film in this season to collect water and restrain it from evaporation could increase the water storage in soil. An experiment was made in summer fallow time in which bare land was covered with plastic film for restoring the rainfall in the soil. The results show that: 1) Wheat yield and soil water content before sowing significant correlation based on certain conditions. The yield has a higher fitting degree with the soil water content before sowing. 2) The soil water content before sowing in different ecological types of winter wheat yield and WUE has significant influence. The yield and WUE in higher soil water content was respectively increasing than middle lever and low lever in 28.40,70.43 and 22.94, 75.06 percentage points. 3) During the summer fallow period, applying this technology which collecting rainfall and control the evaporation, make by conventional tillage soil water efficiency of 33%～38% increasing to 60%～70%. Rain water collection and plastic film cover in summer fallow period could significant improving the soil water condition and stable for ecological winter wheat yield increasing. |
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