将遥感与作物建模联系起来,以预测明尼苏达州的产量和酸盐出
Muhammad Tahir1, David J Mulla1
1Department of Soil, Water, and Climate, University of Minnesota, St. Paul, Minnesota, USA.
Journal of environmental quality
|January 10, 2026
概括
实施替代作物循环和优化肥率可以显著减少酸盐-N泄漏损失,保护地下水质量. 结合覆盖作物和改善灌等实践,进一步增强了这些环境效益.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 农业学是一种农业学.
背景情况:
- 保护区域地下水质量需要在各种作物轮换期间提高作物产量和评估酸盐-N泄漏.
- 环境政策综合气候 (EPIC) 模型是模拟区域规模农业生态系统过程的关键工具.
研究的目的:
- 校准和升级EPIC模型,用于预测不同作物旋转和管理场景的作物产量和酸盐-N浸出.
- 评估替代农业实践在减少酸盐-N在沙土上的浸方面的有效性.
主要方法:
- 使用率实地试验和卫星衍生的作物蒸发转化 (ETc) 校准了EPIC模型.
- 升级模型预测到区域尺度,使用灌水允许13375公沙土的数据.
- 评估了四种管理场景:减少N肥料,添加麦覆盖作物,自动灌,并转换为草-玉米旋转.
主要成果:
- 降低化肥的使用率,并采用覆盖作物,在经过测试的作物轮换过程中降低了酸盐-N的泄漏损失.
- 自动灌策略和将持续的玉米面积转换为花玉米旋转进一步减少了酸盐-N浸.
- 将所有评估实践结合起来,导致潜在的酸盐-N漏到地下水的数量减少了27.4%.
结论:
- 将EPIC模型与现场数据和遥感增强,为升级农业生态系统模拟提供了一个强大的方法.
- 替代作物旋转,优化管理,覆盖作物和智能灌是缓解酸盐-N漏的有效策略.
- 该研究表明,通过综合农业实践,在区域范围内评估和管理地下水质量的潜力.
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