在地膜应用与污染防控方面，研究团队为国际农业塑料协会轮值主席单位，农业农村部农膜污染防控重点实验室依托单位，国务院第二次全国污染源普查农业源地膜专题牵头单位。自2004年以来一直围绕地膜应用及污染防控开展长期系统的研究，先后承担主持了国家科技支撑项目课题，863计划课题、农业部公益类行业专项、国家自然资金以及科技部国际合作重点项目等20余项，在地膜覆盖技术的适宜性评价，地膜污染机理及分等定级，新型降解地膜研发及应用评价等方面引领了学科领域的发展。团队与国际农业塑料协会、意大利国家科学委员会、英国班戈大学、以及德国BASF公司，日本昭和电工株式会社、英国Wells等本领域国际知名团队和企业均有合作关系，与中国科学院理化所、中国科学院长春应化所、清华大学以及石河子大学等国内研究农膜污染和降解地膜的优势团队也有密切的合作。

代表性论文 

1.     Mitigationof greenhouse gas emissions and improved yield by plastic mulching in riceproduction. Science of the Total Environment 2023, 880, 162984.

2.     Macro-andor microplastics as an emerging threat effect crop growth and soil health. Resources,Conservation & Recycling 2022, 106, 549186.

3.     TestingBiodegradable Films as Alternatives to Plastic-Film Mulching for Enhancing theYield and Economic Benefits of Processed Tomato in Xinjiang Region.Sustainability 2021, 13, 3093. 

4.     Effectsof Exogenous Microbial Agents on Soil Nutrient and Microbial CommunityComposition in Greenhouse-Derived Vegetable Straw Composts. Sustainability2021, 13, 2925. 

5.     Effectsof chemical and solar soil-disfection methods on soil bacterial communities. Sustainability2020, 12, 9833.

6.     Agriculturalplastic mulching as a source of microplastics in the terrestrial environment. EnvironmentalPollution, 2020, 260, 114096.

7.     Theimpacts of climate change on wheat yield in the Huang-Huai-Hai Plain usingDSSAT-CERES-Wheat model under different climate scenarios. Journal ofIntegrative Agriculture，2019,18(6): 1379—1391.

8.     Exploringoptimal soil mulching to enhance yield and water use efficiency in maizecropping in China: a meta-analysis. Agricultural Water Management, 2019,225,105741.

9.     Behaviorof microplastics and plastic film residues in the soil environment: A critical review.Science of The Total Environment, 2019, 703:134722. 

10.  Effectsof plastic mulching and plastic residue on agricultural production: Ameta-analysis. Science of the Total Environment, 2019, 651: 484-492

11.  Spatiotemporalvariation of drought characteristics in the context of climate change in theHuang- Huai-Hai Plain, China. Journal of Integrative Agriculture, 2017, 16(10):2308—2322. 

12.  Impactof climate change on potential evapotranspiration under a historical and futureclimate scenario in the Huang-Huai-Hai Plain, China. Theoretical and AppliedClimatology,2018, 132: 387-401

著作

1.     刘  勤，严昌荣，薛颖昊，刘宏金，李  真. 中国地膜覆盖技术应用与发展趋势.北京：科学出版社，2021；ISBN978-7-03-068387-8 

2.     高尚宾，徐志宇，严昌荣，靳  拓，薛颖昊（刘  勤等 副主编）. 可降解地膜农田对比评价筛选及应用.北京：中国农业科学技术出版社，2020；ISBN：978-7-5116-4522-7 

3.     Q Liu,CR Yan, G Sarah , H Zhang, CH Qu. Crop water productivity of winterwheat atmulti-scale and its improvements over the Huang-Huai-Hai Plain, China.北京：科学出版社，2019；ISBN978-7-03-055880

4.     居  辉，刘  勤，杨建莹，严昌荣.黄淮海平原气象干旱对冬小麦产量和水分生产力的影响.北京：科学出版社，2016；ISBN:978-7-03-055880-0 

5.     梅旭荣，刘  勤，严昌荣.中国主要作物生育期图集.浙江：浙江科学技术出版社，2016；ISBN:978-7-5341-7290-8

6.     严昌荣，杨晓光，刘  勤.中国农业气候资源图集·作物水分卷.浙江：浙江科学技术出版社，2015.ISBN：978-7-5341-6873-4