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Chinese Journal of Ecology ›› 2022, Vol. 41 ›› Issue (4): 661-667.doi: 10.13292/j.1000-4890.202203.032

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A meta-analysis on the yield and water use efficiency of main crops covered with plastic film in Xinjiang.

CHEN Li-jun1, BAO Zhe2, LIN Tao3*, YAN Chang-rong4, TANG Qiu-xiang1*   

  1. (1College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China; 2Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, Beijing 100125, China; 3Institute of Industrial Cash Crop, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China; 4Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China).
  • Online:2022-04-10 Published:2022-09-09

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Abstract: To comprehensively and quantitatively evaluate the effects of plastic film mulching on yield and water use efficiency of main crops in Xinjiang, a metaanalysis was conducted to quantitatively analyze changes in yield and water use efficiency of main crops after plastic film mulching. The influencing factors were discussed. Through literature search (from 1982 to 2019), a total of 347 related papers were obtained. After strict screening, a total of 208 data sets were obtained from 52 papers, which were distributed in 18 cities and counties in Xinjiang and covered two main regions of Southern Xinjiang and Northern Xinjiang. Results showed that plastic film mulching significantly increased the yield (24.1%) and water use efficiency (26.0%) of crops. The yield of beet, sunflower, corn, cotton, wheat, and soybean increased by 38.1%, 29.5%, 29.4%, 26.4%, 17.6%, and 15.8% respectively; while water use efficiency of corn, cotton, and wheat increased by 32.0%, 27.3%, and 13.7% respectively. Geographically, the yield enhancement in Southern Xinjiang was greater than that in Northern Xinjiang. Higher enhancement of both yield and water use efficiency was found in relatively poor original soil fertility. There were higher yield increasing effects in areas with mean annual precipitation of <200 mm than those with mean annual precipitation of ≥200 mm. The increase in yield was higher in areas with a mean annual temperature of ≥10 ℃ than those with a mean annual temperature of <10 ℃, with an increase of 31.8% and 27.6% compared to unmulched areas, respectively. The yield increasing effects were more significant in low-altitude areas of <500 m compared with those in high-altitude areas of ≥500 m. The increasing effects of water use efficiency were most obvious in areas with a mean annual temperature of <10 ℃, mean annual precipitation of <200 mm, and high-altitude. This study can provide a reference for the application of plastic film mulching technology in Xinjiang.

Key words: plastic film, yield, water use efficiency, meta analysis.