用于农业应用的功能性水凝
Romana Kratochvílová1, Milan Kráčalík2, Marcela Smilková1
1Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech Republic.
Gels (Basel, Switzerland)
|July 28, 2023
概括
用于土壤应用,含有红酸盐的水凝改善了水的吸收. 然而,NPK肥料降低了保持水分和毛孔大小,单成分肥料显示出更大的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 土壤科学 土壤科学
- 聚合物化学 聚合物化学
背景情况:
- 由于其保留水的能力,水凝越来越多地被用于土壤修改应用.
- 优化水凝成分对于增强土壤特性和施肥供应至关重要.
- 了解水凝在干燥,再膨胀和冷等环境压力下的稳定性对于实际使用至关重要.
研究的目的:
- 描述10种不同的水凝,配备不同数量的NPK矿物肥和酸.
- 评估这些水凝在土壤应用中的稳定性和实用性,重点是干燥/重新膨胀周期和冷.
- 评估红酸盐和NPK对水凝胀,形态和风湿学行为的影响.
主要方法:
- 制备和描述十种不同的水凝配方.
- 使用富里埃变换红外 (FT-IR) 光谱,扫描电子显微镜 (SEM) 分析形态学,胀测试和质性质测量.
- 通过重复的干燥/重新膨胀周期和冷解周期来评估水凝的稳定性.
主要成果:
- 添加酸增强了吸水能力,而NPK肥料对其产生了负面影响,并减少了孔隙大小.
- 酸产生了更异质的多孔结构,而NPK增加了水凝的弹性特征.
- 仅含有NPK或酸盐的水凝表现出最高的稳定性;由于释放肥料,重复循环和冷通常会增加弹性,但没有酸盐的高NPK样品除外.
结论:
- 水凝配方需要仔细平衡酸盐和NPK,以获得最佳的土壤应用性能.
- 酸对保持水分和结构多样性有积极的影响,而NPK对机械性能和孔隙结构有影响.
- 与组合配方相比,单元化肥水凝在重复的环境压力下表现出优越的稳定性.
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