土壤分量的不同反应对草原草原的各种化合物添加的不同反应
Heyong Liu1, Chunbo Li1, Jiayun Zhang1
1College of Life Sciences, Hebei University, Baoding, 071002, Hebei, China.
Journal of environmental management
|September 2, 2024
概括
添加会改变土壤 (P) 形式,增加可用的无机P (Pi) 和减少有机P (Po). 不同的化合物,如尿素和硫酸盐,对土壤的P动态和草原的可用性有不同的影响.
科学领域:
- 土壤科学 土壤科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- (N) 的添加影响土壤 (P) 的转化,影响无机P (Pi) 和有机P (Po) 分数.
- 不同的N化合物形式对土壤P分量的差异影响仍然不太清楚.
研究的目的:
- 为了研究不同的N化合物 ((NH4) 2SO4,NH4NO3,尿素) 和它们的应用率如何影响草原草原中的土壤Pi和Po分数.
- 阐明N诱导的P转换背后的机制,特别是土壤酸化的作用.
主要方法:
- 实地实验使用不同应用速率的三个N化合物:硫酸,酸和尿素.
- 分析土壤无机P (不稳定,中度遮蔽,反抗性) 和有机P (不稳定,稳定) 分数.
- 评估土壤酸化和Olsen-P以评估P的可用性.
主要成果:
- 增加的N添加率导致更高的不稳定性和中度遮蔽的Pi,以及较低的反抗性Pi,与N诱导的土壤酸化有关.
- 土壤不稳定的Po随着N的增加而下降,而稳定的Po保持不变.
- 尿素增强了不稳定的Pi比其他N形式更多,而硫酸由于更大的酸化,对中度遮蔽的Pi产生了更强的作用.
结论:
- 在这种草原生态系统中,N的添加通常会增加土壤P的可用性.
- 化合物的形式显著影响了受影响的特定土壤P分数和P调动的程度.
- 了解N化合物特异性影响对于预测N沉积下的草原土壤P动态至关重要.
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