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| Effects of degradable plastic mulching film on soil moisture, temperature, and yield in cotton fields in southern Xinjiang, China |
| Received:June 05, 2018 |
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| KeyWord:mulching;degradation characteristics;water consumption characteristics;soil growing degree days;water use efficiency(WUE) |
| Author Name | Affiliation | E-mail | | WU Feng-quan | College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China | | | LIN Tao | Institute of Industrial Cash Crop, Xinjiang Academy of Agricultural Sciences Urumqi 830091, China | | | ZUMILAITI Tuergan | College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China | | | DENG Fang-ning | College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China | | | ER Chen | College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China | | | HE Wen-qing | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | TANG Qiu-xiang | College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China | tangqiuxiang2004_2@163.com |
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| Abstract: |
| We researched the impact of biodegradable mulching film on soil water, temperature, and cotton yield in cotton fields in southern Xinjiang. Three kinds of OXO-biodegradable mulching film (T-1, T-2, and T-3) and a new biodegradable mulching film (HS) were compared with the common polyethylene film. Based on the degradation of the film, the soil water, and the temperature in the cotton field, the water consumption and soil growing degree-days in cotton field were calculated to screen biodegradable films suitable for cotton fields in southern Xinjiang. It showed that the degradation rates for T-3 and HS reached 88.6% and 58.7% in the boll-opening stage, while T-1 and T-2 had degraded by only 15.9% and 13.4%. Different biodegradable films also had different influences on the soil water and temperature conditions in the cotton fields. The T-3 and polyethylene film used 688.6 mm and 690.7 mm of water, respectively, during the growth period; these were the highest rates. The soil growing degree-days of the four biodegradable films were lower than that of the polyethylene film;of these, the values for T-3 and HS were lower by 294.3℃·d and 222.8℃·d, respectively, than the values for polyethylene film. The cotton yield and water use efficiency of T-1 were 6.2% and 7.2% higher than those for polyethylene and significantly lower for HS than for polyethylene; there were no significant differences between T-3 and polyethylene film.T-1 and T-2 were better in terms of warming the soil, preserving moisture, and generating a higher yield, but the degradation effect was worse. T-3 had a better degradation rate but did not perform as well at moisture conservation than polyethylene film, although its cotton yield and water use efficiency values were close to those of polyethylene film. Therefore, it is feasible to replace polyethylene mulch film with degraded T-3 mulch film in cotton fields in southern Xinjiang. |
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