人工酸-尿素复合物的合成改善了利用率
Yongxu Jin1, Xi Zhang1, Yue Yuan1
1School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin, 150030, China; Heilongjiang Provincial International Joint Laboratory of Smart Soil, Harbin, 150030, China.
Journal of environmental management
|June 22, 2023
概括
这项研究开发了一种新型的人工酸尿素肥,可以提高 (N) 使用效率. 新的肥料在早期阶段有效释放N,并长期保留它,减少农业N污染.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境化学环境化学
背景情况:
- 传统的 (N) 肥料会导致土壤N的丰富和通过排水,挥发和浸而损失.
- 人工酸 (AHA) 可以提高肥料的效率,但它的异质性阻碍了分析和利用.
- 开发新的肥对于可持续农业和减轻环境污染至关重要.
研究的目的:
- 为了分化人工酸 (AHA),以提高其结构分析和利用效率.
- 准备和评估用于增强 (N) 释放和保留的新型AHA-尿素复合肥料.
- 评估这些肥料对土壤微生物群落和N封存的影响.
主要方法:
- 在不同的pH值下使用连续溶解方法分化AHA.
- 在特定的pH条件下 (例如pH3-4),制备AHA-尿素复合肥料 (A-HAU).
- 土壤化实验测量N释放 (NH4+-N,NO3--N),N含量随时间推移,并分析土壤微生物社区结构.
主要成果:
- 获得了四种具有不同芳香度和分子量的AHA分离物,在pH3-4时具有最高的芳香度.
- 与尿素相比,在pH 3-4 (A-HAU3-4) 准备的AHA-urea肥料显著改善了NH4+-N释放 (38.32%在第7天) 和NO3--N释放 (10.30%在第14天).
- A-HAU3-4提供了持续的无机N供应 (第3-14天),并保持了较高的土壤N含量 (第70天),增加了有益的土壤细菌 (蛋白质细菌,活性细菌),并增强了N的利用和封存.
结论:
- 具有高芳香度或低分子量的人造质肥对于改善初始N利用和长期N固定在土壤中是有效的.
- 该战略提供了一种有希望的方法来减轻农业的污染,并促进土壤健康.
- 开发的AHA分成和化肥制备方法对可持续农业具有重大生态影响.
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