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| 聚乳酸地膜在大棚西瓜种植中的应用研究 |
| Application of Poly（Lactic Acid） Mulching Film in Watermelon Cultivation in Greenhouse |
| 投稿时间：2017-05-26 修订日期：2017-07-05 |
| DOI：10.13254/j.jare.2017.0140 |
| 中文关键词: 聚乳酸地膜，降解，西瓜，重金属 |
| 英文关键词: poly (lactic acid)(PLA) mulching film, degradation, watermelon, heavy metals |
| 基金项目:水体污染控制与治理科技重大专项（2014ZX07204-005-3） |
| 作者 | 单位 | E-mail | | 王亭亭 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023 | | | 李梅 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023 | meili@nju.edu.cn | | 江伟 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023 | | | 吴榕华 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023 | | | 孙成 | 南京大学环境学院, 污染控制与资源化研究国家重点实验室, 江苏 南京 210023 | |
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| 中文摘要: |
| 以西瓜作为受试生物，采用聚乳酸地膜和普通地膜进行对比试验，研究聚乳酸地膜在土壤中的降解特性及对土壤物理、化学特性和西瓜产量的影响。结果表明，聚乳酸地膜的降解过程为首先出现裂纹，再出现孔洞，最后出现裂缝；在西瓜生长过程中，聚乳酸地膜具有良好的保温作用，对土壤重金属以及主要元素氧化物含量无显著影响；覆盖聚乳酸地膜与普通地膜相比，西瓜苗蔓粗和蔓长差异不显著，叶片数和叶绿素含量聚乳酸地膜组均高于普通地膜组，表现为增产趋势，但西瓜产量两者差异不显著。提示聚乳酸薄膜具有良好的降解性且对土壤和作物无显著影响，有望替代普通地膜在农田中推广使用，减少农业薄膜对土壤造成的污染，加快现代生态农业的发展。 |
| 英文摘要: |
| The degradation properties of poly(lactic acid)(PLA) mulching film and its effects on soil and crops were studied in this paper. The comparison experiments based on watermelon production were conducted with PLA mulching film and traditional non-degradable PE mulching film. The results showed that the PLA mulching film firstly appeared cracks, then holes and breaks in the end during the degradation process. The PLA mulching film had more favorable heat preservation effect, and there were no significant differences in the content of soil heavy metals and metal oxidation of main elements in the process of watermelon growth between two mulching films. The impacts of two different mulching films on watermelon stem diameter and length had no significant differences, while the watermelon seedlings, leaves number and chlorophyll content of the PLA mulching film group were higher than that of the traditional non-degradable PE mulching film group, however the watermelon production had no significant differences. The PLA mulching film with good degradation is expected to replace the traditional mulching film in the field. It will reduce the soil pollution caused by agricultural film and accelerate the development of modern ecological agriculture. |
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