| Effects of biodegradable mulching film on soil water evaporation characteristics |
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| DOI：10.7606/j.issn.1000-7601.2020.02.01 |
| Key Words: soil water evaporation characteristics degradable film radiation mode light environment Rose evaporation model |
| Author Name | Affiliation | | JIA Hao | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | LI Wenhao | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | WANG Zhenhua | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water\|Saving Irrigation of Xinjiang Production & Construction Group, Shihezi, Xinjiang 832000, China | | DING Hongwei | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China | | XU Hu | College of Water & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| An indoor soil column evaporation experiment was carried out from May\|November of 2017 with 5 treatments of covering layers (without film: CK, ordinary film: PE, type A fully biodegradable film: BD1, type B fully biodegradable film: BD2, and C type biodegradable mulch film: BD3) and two types of radiation (continuous, intermittent) and three types of light environment (low light, middle light, and high light) on soil water evaporation characteristics. The results showed that the cumulative evaporation curve of each process under the continuous and intermittent radiation mode of infrared light was logarithmic and oscillating (waveform). Under the two radiation modes, the relationship between the changes in evaporation at each stage was low light > middle light > high light. The cumulative evaporation under low light and intermediate light conditions was 72%, 50% (continuous radiation) and 70.5%, 48.9% (intermittent radiation) higher than that under high light conditions, respectively. Under continuous and discontinuous radiation, compared with CK, the steam suppression rate of PE, BD1, BD2, and BD3 treatments were 32.5%, 16.51%, 14.34%, 16.35%, and 26.74%, 16.69%, 15.74%, 17.18%, respectively. Comprehensive analysis showed that mulching effectively reduced soil moisture evaporation, and the inhibition effect of the same covering layer on soil cumulative evaporation was arranged from large to small: PE > BD2 > BD1 > BD3 > CK. Under the same radiation condition, the fitting effect of the Rose model of the cumulative evaporation of type B completely biodegradable membrane treatment was better than that of the other treatments. |
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