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| DOI：10.13522/j.cnki.ggps.20180519 |
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| Effects of Summer Mulch and Planting Methods on Soil Water and Winter Wheat Yield at Dryland in Loess Plateau |
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LIU Yufeng, XIE Yinghe, YANG Futian, LI Tingliang, LI Chao, HUANG Tao, DOU Lu, JI Meijuan
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1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China; 2. National Demonstration Center for Agricultural Resources and Environment Experimental Teaching, Shanxi Agricultural University, Taigu 030801, China; 3. Shanxi Soil and Fertilizer Postgraduate Education Innovation Center, Shanxi Agricultural University, Taigu 030801, China; 4. Shuozhou Vocational and Technical College, Shuozhou 036002, China
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| Abstract: |
| 【Objective】 There is a fallow period during summer in the loess plateau region. The purpose of this paper is to study how to make most of precipitation in this period by mulching, thereby improving soil water storage and the ultimate field of winter wheat.【Method】 A three-year experiment was conducted with three summer mulching and planting method combinations: Straw and plastic film mulch with furrow sowing (JCLG), black net film mulch with flatten surface sowing (HWLT), straw mulch with flatten surface sowing (JLT).【Result】 JCLG significantly increased wheat yield, biomass and precipitation use efficiency by 9.5%~35.1%, 13.2%~42.2% and 8.8%~35.6% respectively, compared to JLT, due to its 29.5% increase in storing the summer precipitation in soil. HWLT also increased water storage and yield by 22.5% and 18% respectively, compared to JLT. We found that the water stored in 0~2 m soil prior to sowing was significantly related to water consumption, yield and biomass of the wheat. 【Conclusion】 Both JCLG and HWLT are effective in improving soil storage of summer precipitation at the dryland in the loess plateau regions, with JCLG most efficient in improving yield and rainfall use efficiency. The method tested in this paper might be applicable to drylands in other areas in China and beyond. |
| Key words: summer fallow mulch; dryland in Loess Plateau; wheat yield, water effect |
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