Hydrophobic modification of waterborne polymer slows urea release and improves nitrogen use efficiency in rice
文献类型： 外文期刊
作者： Shen, Yazhen 1 ; Zhou, Jianmin 1 ; Du, Changwen 1 ; Zhou, Zijun 3 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 N East Beijing Rd, Nanjing 210008, Peoples R China
2.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing 100049, Peoples R China
3.Sichuan Acad Agr Sci, Soil & Fertilizer Inst, Chengdu 610066, Peoples R China
关键词： Controlled-release fertilizer; Hydrophobicity; Fluorinated polyacrylate; Silica; Nitrogen use efficiency
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2021 年 794 卷
页码：
收录情况： SCI
摘要： Controlled-release fertilizers (CRFs) with long release longevity have been actively sought to match the nutrient demands of crops over the entire growing period. Waterborne polymer is an environmental friendliness coating for CRFs because it neither uses organic solvent nor influences soil property. However, its low hydrophobicity leads to a short controlled-release longevity of CRFs coated with waterborne polymer. To overcome this drawback, a hydrophobic coating was fabricated using silica-modified fluorinated lauryl-methacrylate-containing polyacrylate (SFLPA). After hydrophobic modification, both a slower water influx rate and a larger modulus induced a reduced swelling rate and an extended controlled-release longevity consequently from 42 days to 108 days. Furthermore, a pot trial demonstrated that a single application of SFLPA-coated CRFs significantly boosted grain yield (by 13.36%), nitrogen uptake (by 17.44%) and nitrogen use efficiency (by 24.29%) compared to a three-split application of urea in rice production. The study demonstrated substantial potential of silica/ fluorinated waterborne polymer for improving the effectiveness of CRFs in rice production. (c) 2021 Elsevier B.V. All rights reserved.
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