Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agro-Environment and Climate Change, Ministry of Agriculture, Beijing 100081, China.
Sci Total Environ. 2021 May 10;768:144978. doi: 10.1016/j.scitotenv.2021.144978. Epub 2021 Jan 30.
To enhance waste straw utilization and improve fertilizer efficiency, a novel semi-interpenetrating polymer network fertilizer (CMCK-g-PAA/PDMUP) was prepared from straw cellulose and linear polymer by solution polymerization. Polydihydroxymethyl-urea potassium phosphate (PDMUP) was included to supply nitrogen, phosphorus, and potassium nutrients. Characterization of CMCK-g-PAA/PDMUP with FTIR, XPS, XRD, and SEM techniques provided evidence for semi-interpenetrating polymer networks (semi-IPNs) and component interactions. The prepared product exhibited excellent water absorbency (681.3 g/g) and enhanced the soil's water-retention capacity. Cumulative release of N, P, and K was 56.1%, 64.3%, and 74.1%, respectively, after 40 days-meeting a Committee of European Normalization (CEN) standard. Agricultural application of CMCK-g-PAA/PDMUP promoted wheat growth. Desirable water retention, slow-release properties, and wheat growth effects highlight the product's potential for improving agriculture.
为提高秸秆利用率，提高肥料效率，采用溶液聚合法，以秸秆纤维素和线性聚合物为原料，制备了一种新型半互穿聚合物网络肥料（CMCK-g-PAA/PDMUP）。其中包含聚二羟甲基脲磷酸钾（PDMUP），以提供氮、磷、钾养分。通过傅里叶变换红外光谱（FTIR）、X 射线光电子能谱（XPS）、X 射线衍射（XRD）和扫描电子显微镜（SEM）对 CMCK-g-PAA/PDMUP 进行了表征，证明了半互穿聚合物网络（semi-IPNs）和组分相互作用的存在。所制备的产品具有优异的吸水性（681.3 g/g），可增强土壤的持水能力。在 40 天后，N、P 和 K 的累积释放率分别为 56.1%、64.3%和 74.1%，符合欧洲标准化委员会（CEN）标准。CMCK-g-PAA/PDMUP 在农业上的应用促进了小麦的生长。良好的保水、缓释性能和对小麦生长的促进作用突出了该产品在改善农业方面的潜力。
