中国石化破解新疆棉田地膜残留难题|77yy午夜理论片做爰

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  中新社北京11月13日电 记者13日从中国石化获悉,中国石化在新疆维吾尔自治区乌苏市发布万亩棉田PBST地膜试验示范项目成果,宣布其完全自主知识产权的PBST全生物降解地膜试用成功,与使用传统PE(聚乙烯)地膜的对照田相比,棉花产量总体相当,为稳定棉花产量、解决地膜残留问题提供了可行路径。

  新疆作为中国重要的棉花产区,长期使用PE地膜以保墒增温,然而PE地膜难以自然降解,残膜累积问题亟待解决。前期市场上已有的PBAT等全生物降解地膜耐候期短,在新疆棉花花铃前期降解较快,保墒保温效果不足,无法保障棉花正常生长。

  据悉,PBST(聚对苯二甲酸丁二酸丁二醇酯)是中国石化所属北京化工研究院开发出具有完全自主知识产权的全生物降解材料,用其制成的地膜在抗紫外线、水汽阻隔等方面表现较其他全生物降解材料更为优异。多年试验表明,PBST地膜在不同地域、不同作物使用后,1至3年内可完全降解成水、二氧化碳和矿化物等无害物质。

  10月,第三方机构评估和实收测产数据显示,覆盖PBST地膜的棉田与对照组覆盖PE地膜的棉田相比产量总体相当,地膜降解速度明显,未来可完全降解成水、二氧化碳和矿化物等无害物质,不需要回收。在满足新疆棉花生长需要的同时,降低了成本,并有效解决了PE残留地膜对土壤的影响问题,经济和生态效益明显,为新疆农业可持续发展提供了可复制推广的实施路径。(完)

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