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| Effects of PBAT biodegradable plastic mulch film on soil physical and chemical properties and yields of cotton and maize in Southern Xinjiang, China |
| Received:February 27, 2018 |
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| KeyWord:PBAT biodegradable plastic film;Southern Xinjiang;degradable performance;crop yield;soil environment |
| Author Name | Affiliation | | WANG Bin | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | WAN Yan-fang | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | WANG Jin-xin | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | SUN Jiu-sheng | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | WANG Xin-yong | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | HUAI Guo-long | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China | | KONG Li-ming | Xinjiang Kang Runjie Environment Protection Sciences Co. Ltd, Urumqi 830001, China |
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| Abstract: |
| In order to further explore the full biodegradable plastic mulch film of poly(butylene adipate-co-terephthalate) (PBAT) and its effect on crop yield and soil environment, in this study, PBAT biodegradable plastic mulch film and polyethylene(PE) film were selected. An experiment was carried out in the cotton and maize planting areas of Southern Xinjiang. Crop yield and soil temperature, moisture, and nutrient levels were measured. Then, the degradation of PBAT biodegradable plastic mulch film and its effect on crop yield and soil environment were analyzed. The results showed the following. The degradation of PBAT biodegradable plastic mulch film started with small cracks, then small holes grew, and finally the film was broken down into many pieces at the crop harvest stage. The film became more brittle and thinner during the degradation. The fragmentation period of PBAT biodegradable plastic mulch film in the Bazhou area occurred 4 days sooner that in the Akesu area, and the cracking period in the Kashi area occurred more than 7 days ahead of that in the Hetian area, but the differences in the same crop in different regions were not significant(P>0.05). Before the induction period of PBAT biodegradable plastic mulch film, soil temperature and moisture at depths of 5 cm and 10 cm were higher than with the PE film, except for mean soil temperature at a depth of 5 cm in the Bazhou cotton area. There was no significant difference between PBAT biodegradable plastic mulch film and PE film(P>0.05). Under the PBAT biodegradable plastic mulch film, soil nutrients in the same area were slightly different in the early sowing and harvest stages, but the differences were not significant(P>0.05). Compared with the PE film, the cotton yields with the PBAT biodegradable plastic mulch film in the Bazhou and Akesu areas increased by 8.33% and 6.48%, respectively(P>0.05), and the maize yield in the Kashi and Hetian areas increased by 3.67% and 14.97%, respectively(P>0.05). In summary, the degradation of PBAT biodegradable plastic mulch film was good, and the impacts of soil moisture, soil temperature, and crop yield were the same as those with the PE film. PBAT biodegradable plastic mulch film could be applied as a substitute for PE film in agricultural production in Southern Xinjiang, as it had no significant impact on the crop and soil environment. |
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