替代聚乙烯（PE）薄膜：青贮玉米田新型牛粪基液体地膜。
Substitute for polyethylene (PE) films: A novel cow dung-based liquid mulch on silage cornfields.
机构信息
Faculty of Mechanical and Electrical Engineering, Gansu Agricultural University, Lanzhou, China.
Faculty of Mechanical Engineering, Chengdu University, Chengdu, China.
出版信息
PLoS One. 2022 Jul 13;17(7):e0271273. doi: 10.1371/journal.pone.0271273. eCollection 2022.
To prevent soil pollution caused by polyethylene (PE) films in the central region of Gansu, China, liquid mulching made from cow dung (CDLM) was trailed in silage maize fields. The degradation of CDLM and PE films, soil temperature, soil organic matter content, silage maize yield and water use efficiency (WUE) were evaluated for three years (2018-2020). The degradability of CDLM has been found to be much stronger than the one of PE films, with CDLM degrading 40-60 days after sowing and finishing around 100 days. CDLM had a lower insulating impact than PE films but a higher insulating effect than non-mulching films as the control (CK); CDLM could successfully increase soil organic matter, with a total increase of 1.01% over three years. CDLM increased silage maize yield by 6.2% compared to PE films and 17.2% compared to CK. Consequently, CDLM may be an interesting alternative to PE films for enhancing silage maize yield while decreasing soil contamination.
为防止中国甘肃中部地区聚乙烯（PE）薄膜造成土壤污染，在青贮玉米田中试用牛粪液体覆盖（CDLM）。三年（2018-2020 年）来，评估了 CDLM 和 PE 薄膜的降解、土壤温度、土壤有机质含量、青贮玉米产量和水分利用效率（WUE）。发现 CDLM 的降解性比 PE 薄膜强得多，播种后 40-60 天即可降解，约 100 天即可完成。CDLM 的隔热效果低于 PE 薄膜，但高于对照（CK）的非覆盖薄膜；CDLM 能成功增加土壤有机质，三年共增加 1.01%。与 PE 薄膜相比，CDLM 使青贮玉米产量增加了 6.2%，与 CK 相比增加了 17.2%。因此，CDLM 可能是一种很有前途的替代 PE 薄膜的方法，既能提高青贮玉米产量，又能减少土壤污染。
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