在越南的公河三角洲传统水种植下的水和土壤中的营养动态
Nguyen Vo Chau Ngan1, Huynh Van Thao2, Nguyen Dinh Giang Nam1
1Department of Water Resources - College of Environment and Natural Resources, Can Tho University, Can Tho city, 900000, Vietnam.
F1000Research
|February 5, 2024
概括
越南大米田的营养损失主要是通过排水,特别是和,而不是漏. 尽管含有高量的营养物质,土壤有机物质仍然低至中等,这表明需要更好的营养物质管理策略.
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:
- 营养素的变化是了解土壤潜力和优化大米生产的关键.
- 合成肥料和农业实践显著影响营养动态.
- 评估水和土壤中的营养动态对于可持续农业至关重要.
研究的目的:
- 评估地表水,地下水和土壤中的营养动态.
- 为了比较当地水资源管理和传统大米种植下的营养水平.
- 为了确定越南公河三角洲的营养损失途径.
主要方法:
- 实地实验是在两个季节 (2018年湿,2019年干) 进行的.
- 对地表水,地下水 (30-45厘米) 和地表土 (0-20厘米) 的分析.
- 每个季节收集和分析8个样本.
主要成果:
- 在受精后观察到的 (N) 和 (P) 峰值.
- 地表水的营养含量始终高于地下水 (N-NO3除外).
- 传统种植显示肥料对总N和土壤有机物 (SOM) 的影响微不足道,但增加了总P.
结论:
- 营养物质的损失 (N-NH4+,P-PO43-,总P) 主要通过排水而发生.
- 地表水和地下水之间的酸盐 (N-NO3-) 损失是可比的.
- 土壤营养水平很高,但SOM低至中,这表明改善土壤健康和营养管理的潜力.
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