| Influence of different film mulching methods on soil water content, soil temperature and yield of winter wheat in the drought plateau of the eastern Gansu Province |
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| DOI：10.7606/j.issn.1000-7601.2016.04.33 |
| Key Words: winter wheat mulching methods soil water content and soil temperature yield the drought plateau of the eastern Gansu Province |
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| Abstract: |
| Winter wheat Pingliang 43 was employed as the experiment material in this study to determine the effects of different film mulching methods on soil water content, soil temperature and yield of winter wheat. Different plastic film mulching treatments, including whole plastic-film mulching combined with soil overlying and bunch seeding (A), whole plastic-film mulching and bunch seeding (B), furrow drilling beside plastic film (C), and open drill seeding (CK) were implemented on winter wheat from 2012 to 2014 in the Xiazhai village, Caofeng town, Kongtong district, Pingliang city. The results showed that film mulching could significantly improve the soil water content and ground temperature from the seedling emergence stage to the jointing stage of winter wheat, and influence by the film mulching on surface soil water content and ground temperature was greater than that on the deep soil. The soil water content by different treatments followed the order of A>B>C>CK, and the soil temperature followed the order of B>A>C>CK (The difference between A and B is small). After the heading stage of winter wheat, changes of soil water content and ground temperature by different treatments were similar to, or even smaller than those by the control. Effects by different treatments on water use efficiency and yield followed the order of A>B>C>CK. Compared to the control, the water use efficiencies by treatment A, B and C were increased by 83.75%, 63.48% and 41.31%, respectively. The economic outputs by treatment A, B and C were increased by 2 587.5 kg·hm-2, 1 989.75 kg·hm-2 and 1 617.0 kg·hm-2, respectively. Variance analysis showed that water use efficiencies and economic yields by treatments A and B and C, were extremely significant different from CK at the 1% level, and there was also a very significant difference between the treatments. In conclusion, the whole plastic-film mulching combined with soil overlying and bunch seeding is the best film mulching method which can improve rainfall resources utilization and raise the yield of winter wheat. It can be applied in the drought plateau of the eastern Gansu Province. |
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