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基于加拿大大草原各种短期作物轮换的最低数据集,对土壤健康的定量评估

Ekene Mark-Anthony Iheshiulo¹, Francis J Larney², Guillermo Hernandez-Ramirez³

¹Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada; Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada.

The Science of the total environment

|May 19, 2024

概括

可持续农业依赖于土壤健康 (SH). 这项研究确定了主要的土壤指标和方法来评估SH在加拿大大草原的不同作物旋转,发现多样化的旋转最有效.

科学领域:

农业科学农业科学
土壤科学土壤科学
生态生态学生态生态学

背景情况:

土壤健康 (SH) 对农业的可持续性和生产力至关重要,特别是在气候变化下.
评估SH需要适当的指标,评分和索引方法,特别是对于无耕作作物轮换.
无耕作农业实践对于保持土壤结构和功能至关重要.

研究的目的:

开发最低数据集 (MDS) 用于在无耕作作物转换下进行SH评估.
在三个加拿大大草原地区,在六个不同的作物旋转中评估SH.
为了比较SH评估的不同评分和索引方法.

主要方法:

主要成分分析 (PCA) 用于从14个土壤指标的总数据集 (TDS) 中识别MDS.
在特定的深度分析了土壤的化学和物理特性.
线性 (L) 和非线性 (NL) 评分,加上添加剂 (A) 和加权添加剂 (WA) 索引,用于计算土壤健康指数 (SHI).

主要成果:

跨站点的共同MDS指标包括土壤有机碳,散装密度,巨孔性和植物可用的水容量.
非线性加权添加剂SH索引 (SHI.NLWA) 在作物旋转中有效区分了SH (R2 = 0.890.94,P < 0.05).
多元化和高风险/高回报轮换在特定地点显示出优异的SHI,表明土壤功能得到增强.

结论:

SHI.NLWA方法是作物轮换中短期SH评估的一个敏感工具.
农作物轮换的选择显著影响土壤健康,某些轮换促进了土壤更好的功能.
持续监测SHI和战略作物旋转选择可以提高农业生态系统的生产力和可持续性.

关键词:

多种多样的作物旋转.最少的数据集是最小的数据集.土壤的功能土壤的功能土壤健康指数土壤健康指数土壤的特性土壤的特性

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