通过使用绿色肥料在果园的流域中减轻土壤有机矿化造成的排水酸盐损失
1College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China.
Water research
|July 28, 2023
概括
土壤有机矿化导致果园的酸盐-损失. 绿色肥料通过抑制土壤矿化来有效地减少这种损失,与有机肥料不同.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 来自农业水域的酸盐- (NO3-N) 损失显著降低了水质.
- 果园,高肥输入,是NO-N损失的主要贡献者.
- 了解NO3的来源和缓解对于这些污染地区的可持续管理至关重要.
研究的目的:
- 为了确定流失的主要来源NO3--N在果园的采集区的损失.
- 评估不同管理实践对NO3损失的影响.
- 确定土壤 (N) 矿化在NO3污染中的作用.
主要方法:
- 在中国中部的果园中进行了实地和采水区规模的实验.
- 双同位素追踪法 (δ15N和δ18O的NO3-) 来追踪NO3--N的来源.
- 化实验评估土壤N矿化潜力和不同处理 (无N,常规N,有机,绿色) 的速度.
主要成果:
- 土壤有机 (SON) 矿化是流失NO3的主要来源.
- 有机肥料的应用增强了SON矿化潜力和速度,增加了NO-N损失的29.0%.
- 与有机肥相比,绿色肥料覆降低了18.6%的土壤N矿化率和12.4%的整体NO-N损失.
结论:
- 调节SON矿化对于控制类水域地表水中的NO3污染至关重要.
- 绿色肥料堆肥是一种有效的减缓策略,可以减少NO3的损失.
- 传统和有机化肥实践可能会通过增强土壤N矿化而加剧NO-N损失.
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