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| Effects of plastic film residue on water consumption characteristics and biomass accumulation and distribution in drip irrigation of cotton |
| Received:September 17, 2016 |
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| KeyWord:residual plastic film;the characteristics of water consumption;biomass accumulation and distribution;water use efficiency |
| Author Name | Affiliation | E-mail | | WANG Liang | College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China | | | LIN Tao | Xinjiang Academy of Agricultural Sciences Institute of Industrial Crops, Urumqi 830091, China
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | TIAN Li-wen | Xinjiang Academy of Agricultural Sciences Institute of Industrial Crops, Urumqi 830091, China | | | YAN Chang-rong | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | HE Wen-qing | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | WANG Jing | College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China | | | TANG Qiu-xiang | College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China
Key Laboratory for Agricultural Environment, Ministry of Agriculture, Beijing 100081, China | tangqiuxiang2004_2@163.com |
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| Abstract: |
| The plot and field simulation experiments were undertaken to determine the effect of plastic film residues on water consumption, consumption modulus, evaporation, water use efficiency, biomass accumulation and distribution in a drip irrigated cotton field covered by plastic mulch during 2014-2015 in an arid region. Three treatments including plastic film residue amount of 0 kg·hm-2, 225 kg·hm-2 and 450 kg·hm-2 were designed based on investigation of typical cotton field representing local present situation. The results showed that during the whole growing period, residue addition of 225 kg·hm-2 and 450 kg·hm-2 decreased the water consumption by 25.60 mm and 33.74 mm and increased mean evaporation intensity of growth period by 0.07 mm·d-1 and 0.16 mm·d-1 compared to no film treatment, respectively. Although, total crop water consumption was not significantly affected by plastic film residues between 225 kg·hm-2 and 450 kg·hm-2 treatments, but was significantly decreased compared to no film treatment, respectively. The consumption modulus decreased with increase in the residual amount of plastic film, especially, in seedling and bud stage. Meanwhile, increasing plastic film residue could decrease soil water use efficiency and biomass. In sum, water consumption, effective water consumption ratio and seed cotton yield could be described by residual plastic film, respectively. And the water consumption demand in the early stage of growth was significantly inhibited. This study could provide valuable information for well understanding effects of residual film in farmland. Further field and modelling studies are needed to extrapolate the findings to a wider range of crop and site conditions, and to develop threshold and early warning informations to assist researchers or farmers to better to reduce the risk of residual film. |
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