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测试具有不同可溶性产品的短期和长期肥效率的方法

Mina Kiani¹, Kari Ylivainio²

¹Natural Resources Institute Finland, Finland; Department of Agricultural Sciences, University of Helsinki, Helsinki, Finland.

The Science of the total environment

|February 20, 2024

概括

从废物流中回收是可持续农业的关键. 薄膜扩散梯度 (DGT) 方法准确预测这些材料中的含量,性能优于传统测试.

科学领域:

农业科学农业科学
环境化学环境化学
土壤科学土壤科学

背景情况:

从富含营养的侧流 (NRSS) 中恢复 (P) 对可持续食品生产和循环经济倡议至关重要.
验证回收P产品的农业效率对于它们成功融入农业实践至关重要.

研究的目的:

用化学分化和薄膜扩散梯度 (DGT) 方法确定各种NRSS和衍生产品中的含量.
评估选定的NRSS的P可用性,用大麦和麦草进行短期和长期植物生长实验.
为了比较DGT方法的预测能力与传统的化学提取剂 (酸,酸,酸盐) 的P可用性.

主要方法:

使用Hedley分化和DGT方法评估来自芬兰,瑞典和德国的83个NRSS的P可用性.
进行控制的大麦和麦草生长实验,以评估15个选定的NRSS的短期和长期P可用性.
将DGT土壤测试结果与常规提取剂进行比较:2%的酸 (FA),2%的酸和中性酸.

主要成果:

牲畜便和泥显示出相当大的可变P含量,相当于超酸盐 (SP).
斯特鲁维特和AshDec®显示了与SP相比的P可用性,尽管P微分数较低,这表明了其他影响因素.
在增长实验中,DGT方法在预测短期和长期P可用性方面表现优于常规提取剂,包括2%FA.

结论:

DGT方法是评估NRSS和用于肥料的衍生产品中的P可用性的有希望的工具.
传统的提取剂,特别是2%的FA,在准确预测不同营养来源的P可用性方面存在局限性.
通过改善对回收材料中P可用性的理解,研究结果支持在循环经济中加强P管理策略.

关键词:

DGT 方法 DGT 方法 P 可用性 P 可用性回收的肥料回收的肥料.相对的农业效率相对的农业效率.可持续的P肥生产可持续的P肥生产

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