期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 61, 期 34, 页码 8166-8174出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf402519t
关键词
double-layer polymer-coated urea; corn stover; feather meal; nitrogen release rate; water retention; leaching
资金
- Science Tackle Key Problem of Shandong Province [2009GG10006002]
- Natural Science Foundation of Shandong Province [Y2008.D29]
- Key Projects in the National Science AMP
- Technology Pillar Program during the Twelfth Five-year Plan Period [2011BAD11B01, 2011BAD11B02]
- Key Projects in the National 948 Program during the Twelfth Five-year Plan Period [2011-G30]
- National Natural Science Foundation of China [30871593]
In this paper, we synthesized a biobased polyurethane using liquefied corn stover, isocyanate, and diethylenetriamine. The synthesized polyurethane was used as a coating material to control nitrogen (N) release from polymer-coated urea. A novel superabsorbent composite was also formulated from chicken feather protein (CFP), acrylic acid, and N,N'-methylenebisacrylamide and used as an outer coating material for water retention. We studied the N release characteristics and water-retention capability of the double-layer polymer-coated urea (DPCU) applied in both water and soils. The ear yields, dry matter accumulation, total N use efficiency and N leaching from a sweet corn soil-plant system under two different irrigation regimes were also investigated. Comparison of DPCU treatments with conventional urea fertilizer revealed that DPCU treatments reduced the N release rate and improved water retention capability. Evaluation of soil and plant characteristics within the soil-plant system revealed that DPCU application effectively reduced N leaching loss, improved total N use efficiency, and increased soil water retention capability.
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