生态环境学报 ›› 2022, Vol. 31 ›› Issue (11): 2189-2197.DOI: 10.16258/j.cnki.1674-5906.2022.11.010

• 研究论文 • 上一篇    下一篇

贵州省典型覆膜耕地残膜赋存特征及影响因素

李亮亮1(), 代良羽2, 高维常3, 张淑怡1,3, 刘涛泽1,*()   

  1. 1.贵州民族大学生态环境工程学院,贵州 贵阳 550025
    2.贵州省农业生态与资源保护站,贵州 贵阳 550001
    3.贵州省烟草科学研究院烟草行业山地烤烟品质与生态重点实验室,贵州 贵阳 550081
  • 收稿日期:2022-05-25 出版日期:2022-11-18 发布日期:2022-12-22
  • 通讯作者: *刘涛泽(1981年生),男,副研究员,博士,研究方向为生物环境地球化学。E-mail: liutaoze@foxmail.com
  • 作者简介:李亮亮(1994年生),男,硕士研究生,从事农业生态研究。E-mail: 791904591@qq.com
  • 基金资助:
    国家自然科学基金项目(42167067);贵州省农田地膜残留监测项目(GZGC-2021-C16)

The Occurrence Characteristics and Influencing Factors of Residual Mulching Film of Typical Farmland with Plastic Film in Guizhou Province

LI Liangliang1(), DAI Liangyu2, GAO Weichang3, ZHANG Shuyi1,3, LIU Taoze1,*()   

  1. 1. College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, P. R. China
    2. Guizhou Ecological Agriculture and Resource Protection Station, Guiyang 550001, P. R. China
    3. Upland Flue-cured Tobacco Quality & Ecology Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, P. R. China
  • Received:2022-05-25 Online:2022-11-18 Published:2022-12-22

摘要:

地膜作为重要的农业生产资料被广泛应用于农作物种植,而且覆膜种植面积正迅速增加。地膜是一种人工合成的高分子聚合物,在自然条件下短期内很难降解,不合理的应用和不健全的回收体系导致中国农田生态环境出现严重的白色污染问题。地膜在土壤中的残留不仅改变了农田土壤的理化性状,而且对农作物的生长、农耕操作和生态环境都会产生不利的影响。贵州地处长江和珠江上游,是中国重要的生态屏障之一。当前地膜残留的增加正带来流域内严重的塑料污染,而针对该区域地膜残留现状和赋存特征方面的研究尚且有限。通过问卷调查与取样监测相结合的方法对贵州省主要覆膜作物(烤烟、蔬菜和辣椒)的地膜使用和残留情况等进行调查和采样分析,并探讨区域内土壤残膜赋存特征及影响因素。对不同覆膜年限(1-20 a)的29个农田样地的分析结果表明,土壤中残膜含量分布在8.18-235.39 kg·hm-2,平均值为70.84 kg·hm-2。随着覆膜年限增加,地膜平均残留含量和数量整体表现为先增加后减少的趋势。与覆膜1-5 a相比,6-10 a和11-15 a平均残膜含量增加了87.69%和146.59%,平均残膜数量增加了69.30%和235.10%;而当覆膜16-20 a,平均残膜含量和数量均低于11-15 a。残膜破碎度值也随覆膜年限增加呈现逐年减小趋势,表明覆膜时间越久,残膜破碎程度越大。另外,土壤质地和覆膜作物种类也是影响地膜残留量的重要因素。不同土壤类型平均残膜含量表现为壤土>黏土>砂土;在相同覆膜年限的情况下,蔬菜种植区平均残膜量最大,其次是烤烟,辣椒平均残膜量最小。该研究将为加强地膜残留污染监管和防控提供科学的依据和技术支持。

关键词: 贵州省, 耕地, 土壤, 地膜残留量, 覆膜年限, 赋存特征, 影响因素

Abstract:

As an important agricultural production material, plastic mulch film is widely used in crop planting, and the use area of mulch film is increasing rapidly. Plastic mulch film is a class of synthetic polymer, which is difficult to degrade under natural conditions in a short period of time. Its unreasonable application and unsound recovery system have brought serious white pollution to China’s ecological environment. The residue of plastic mulch film in soil not only changes the physicochemical properties of farmland soil, but also adversely affects the growth of crops, plowing operations and ecological environment. Guizhou, located in the upper reaches of the Yangtze River and the Pearl River, is one of the important ecological barriers in China. Currently, the increase of plastic film residue is bringing about serious plastic pollution in the watershed. However, researches on the distribution and occurrence characteristics of plastic film residue in Guizhou Province are limited. In this paper, the use and residue of plastic film of main plastic film mulching crops (flue-cured tobacco, vegetables and pepper) in Guizhou province were investigated and analyzed based on questionnaires and sampling monitoring. The occurrence characteristics and influencing factors of soil residual film in the region were studied as well. According to the research results on twenty-nine farmland plots with different film mulching years (1-20 years), the content of residual film in soil was 8.18-235.39 kg·hm-2 with an average of 70.84 kg·hm-2. With the increase of the film mulching year, the average residual amount and quantity of plastic film increased firstly and then decreased. Compared with that covering 1-5 years, the average amount of residual film in 6-10 years and 11-15 years increased by 87.69% and 146.59%, and the average amount of residual film increased by 69.30% and 235.10%, respectively. When the film was covered for 16-20 years, the average content and quantity of residual film were lower than those of 11-15 years. The fragmentation value of the residual film showed a decrease trend with the increase of film mulching year, indicating that the fragmentation degree of the residual film enhanced with the increase of the film mulching time. In addition, soil texture and the type of crop were important factors affecting the residual amount of plastic film. The average content of residual film in different soil types showed that loam > clay > sandy soil. In the case of the same plastic film mulching time, vegetable planting area showed the highest average amount of residual film, followed by flue cured tobacco and pepper. This study would provide a scientific basis and technical support for strengthening the supervision and control of plastic film residual pollution.

Key words: Guizhou Province, cultivated land, soil, residual plastic film content, film mulching years, distribution characteristics, Influencing factors

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