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Updated: Jun 9, 2025

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

评价中国网格耕地预算和利用效率

Shiyu You¹, Hao Shi¹, Fei Lun²

¹State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.

Journal of environmental management

|October 24, 2024

概括

中国中国中国中国.

科学领域:

农业科学农业科学
土壤科学土壤科学
环境科学环境科学

背景情况:

土壤 (P) 动态对于农业的可持续性至关重要.
农田的长期,电网级P预算和利用效率 (PUE) 数据很少.
了解P动态对于可持续粮食生产至关重要.

研究的目的:

在0.1°分辨率下,全面评估中国1992-2018年农田P预算和PUE演变.
确定这些变化的人类和环境驱动因素.
分析P动态与经济发展之间的关系.

主要方法:

采用0.1°空间分辨率数据集,用于中国,涵盖1992-2018年.
分析了土壤P预算 (输入-输出平衡) 的变化.
计算作物P使用效率 (PUE) 和评估影响因素.

主要成果:

中国的农田P预算从1992年的赤字 (-3.70 Tg P yr−1) 转变为2018年的余 (0.31 Tg P yr−1).
国家平均PUE最初下降,然后增加,但在2003年之后仍然低于0.40.
确定了P预算与人均GDP之间的反向U形关系,以及PUE的U形关系.

结论:

增加的肥料应用和减少的土壤侵蚀推动了P的预算转移.
在PUE中存在显著的区域和特定作物的变化,特别是在利作物中.
需要量身定制的,区域化的管理策略来优化P输入并最大限度地减少损失.

关键词:

农作物种植区农作物种植区的预算的预算的使用效率高.土壤侵蚀导致土壤侵蚀.

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