用于控制释放肥的生物基聚氨涂层:合成,表征和对P使用效率的影响
Eduardo Lopes Cancellier1, Fien Degryse2, Rodrigo C da Silva2
1Laboratory of Fertilizers Technologies - INNOVA FERT, Department of Soil Science, Federal University of Lavras (UFLA), P.O. Box 3037, Lavras, 37203-202, MG, Brazil.
The Science of the total environment
|September 11, 2025
概括
控制释放肥料 (CRF) 的生物基涂层显示出有前途. 麻油聚氨有效地延迟了释放,提高了在高度固定土壤中的P使用效率,但在其他土壤中只有有限的好处.
科学领域:
- 农业科学 农业科学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 控制释放肥料 (CRF) 中的以石油为基础的涂层存在环境风险.
- 在提高 (P) 使用效率方面,CRF的有效性仍然不确定.
研究的目的:
- 从麻油和小麦中合成生物基聚氨 (PU) 涂层.
- 评估这些生物基CRF对P使用效率的影响.
主要方法:
- 麻油和液化小麦炉被用来制造PU涂层.
- 涂层单酸 (MAP) 具有不同的寿命 (7,37,209天) 在不同土壤类型的化和试验中进行了测试.
主要成果:
- 以麻油为基础的PU在6%的涂层率下实现了209天的P释放寿命.
- 在37天的寿命长期中,MAP在高固定性Oxisol中减少了P固定,并将小麦的P吸收增加了50%.
- 在具有较低P固定能力的土壤中,CRF显示出有限的益处.
结论:
- 具有适当释放率的生物基CRF可以在高度P固定土壤中提高P肥效率.
- CRF的有效性取决于土壤,在大多数土壤类型中预计的影响最小.
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