| Effect of mulching film after straw returning on soil temperature and grain yield of dryland winter wheat |
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| DOI：10.16302/j.cnki.1000-7601.2015.01.026 |
| Key Words: straw returning mulching film rolling dryland winter wheat soil temperature grain yield |
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| Abstract: |
| The study were conducted investigate the effect of mulching film after straw returning on soil temperature and grain yield under rainfed condition in Loess Plateau of northwestern China. Seven treatments were conducted: maize straw returning + whole mulching film + rolling pre-sowing (T1), maize straw returning + rolling pre-sowing (T2), maize straw returning(T3), wheat straw returning + whole mulching film + rolling pre-sowing (T4), wheat straw returning + rolling pre-sowing (T5), wheat straw returning(T6) and open field dibble(CK). The average temperature at soil layer of 0～25 cm during whole growth period were in the order of T4(15.26℃)＞T1(14.94℃)＞T5(14.80℃)＞CK(14.66℃)＞T3(14.64℃)＞T2(14.57℃)＞T6(14.47℃). The temperature increased in treatments of straw returning + whole mulching film + rolling pre-sowing and straw returning + rolling pre-sowing, while temperature decreased in straw returning treatment. The warming effect of wheat straw returning was higher than that of the maize straw returning. Significant increase in grain yield existed among the six treatments, being 69.36%, 27.94%, 19.38%, 45.12%, 13.30% and 9.79% higher than that of CK, respectively. |
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