Biobased polymer composites derived from corn stover and feather meals as double-coating materials for controlled-release and water-retention urea fertilizers.
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.
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong 271018, China. yangyuechao2010@163.com
Yuechao
Y
Yang
Zhaohui
Z
Tong
Yuqing
Y
Geng
Yuncong
Y
Li
Min
M
Zhang
D000818:Animals; D002622:Chemistry, Agricultural / Q000379:methods*; D002645:Chickens; D003692:Delayed-Action Preparations / Q000737:chemistry*; D005241:Feathers / Q000737:chemistry*; D005308:Fertilizers / Q000032:analysis*; D011140:Polyurethanes / Q000138:chemical synthesis*; D014508:Urea / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
D003692:Delayed-Action Preparations; D005308:Fertilizers; D011140:Polyurethanes; D014508:Urea