Synthesis of a slow-release fertilizer composite derived from waste straw that improves water retention and agricultural yield
文献类型: 外文期刊
作者: Weishuai Wang;Shiqi Yang;Aiping Zhang;Zhengli Yang
作者机构:
关键词: Fertilizer; Semi-interpenetrating polymer networks; Slow-release; Straw cellulose; Water retention
期刊名称: Sci. Total Environ.
ISSN: 0048-9697
年卷期: 2021 年 768 卷
页码:
收录情况: JCR(2021版) ; EI(2021版)
摘要: 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. © 2021 Elsevier B.V.
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