| Cite this article: | 贾咏霖,屈忠义,丁艳宏,等.不同灌溉方式下施用生物炭对土壤水盐运移规律及玉米水分利用效率的影响[J].灌溉排水学报,2020,(8):-. |
| Qu Zhongyi,Jia Yonglin,Ding Yanhong,et al.不同灌溉方式下施用生物炭对土壤水盐运移规律及玉米水分利用效率的影响[J].灌溉排水学报,2020,(8):-. |
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| This article has been：Browse 2021Times Download 0Times |
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| Effects of Straw Biochar on Soil Water, Salt Transport and Water Use Efficiencey in Corn grown under Different Irrigation Conditions |
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Qu Zhongyi1, Jia Yonglin1, Ding Yanhong2, Yang Wei1, Ma Guiren1, Li Zhengzhegn1
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1.Water Conservancy and Civil Engineering College,Inner Mongolia Agricultural University;2.College of Water Resources and Architectural Engineering,Northwest A＆F University
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| Abstract: |
| 【Objective】 Inner Mongolia Hetao Irrigation District has a high degree of soil salinization and serious waste of farmland water resources. Investigate the effects of biochar on soil water and salt transport characteristics, crop growth and water use efficiency under different irrigation methods in the medium and long term. Recommend suitable irrigation methods and biochar use for efficient use of farmland water resources and salinization of arable land. Provide theoretical basis and technical support. 【Method】Irrigation method and corn straw biochar amount were used as two factors to design a completely random block field plot experiment. A total of 6 treatments were set up. Among them, the irrigation methods were groundwater drip irrigation, groundwater subsurface irrigation, and yellow river subsurface irrigation. Biochar was applied to the soil surface before being planted in 2016 and mixed into the soil plough layer with a tiller. Biochar was no longer applied in 2017 and 2018. In the 2018 corn growing season, we investigated and analyzed soil moisture dynamics, salt reduction effect, corn yield, evapotranspiration and water use efficiency under the conditions of irrigation and biochar coupling.【Result】Under the condition of groundwater drip irrigation, compared with the treatment without biochar, the amount of desalination increased by 13.3%, the crop evapotranspiration increased by 10.5%, the water use efficiency was 6.0%, and the yield increased by 3.5%. Under the condition of irrigated irrigation, the amount of desalination increased by 5.0%, the evapotranspiration increased by 1.3%, the yield increased by 4.8%, and the water use efficiency increased by 3.1%.【Conclusion】In the third year after the application of biochar, it can still inhibit the salt accumulation of 0-100 cm soil in maize farmland under different irrigation methods, improve crop water use efficiency and increase crop yield. In comparison, application of 30 t/hm2 biochar under film drip irrigation under the film has better water-saving and salt-saving effects and increased yield. |
| Key words: different irrigation conditions; biochar; medium and long-term effects; desalination; soil moisture; yield components |
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