肥料使用の増加は花や昆虫の数を激減させるという新しい研究結果(New study finds increasing fertiliser use drastically reduces the number of flowers and insects)

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2025-01-27 サセックス大学

サセックス大学の研究チームは、肥料の使用量が増加すると、花や昆虫の数が大幅に減少することを発見しました。 この研究は、肥料の過剰使用が生物多様性に及ぼす負の影響を示しており、持続可能な農業の実践が重要であることを強調しています。

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花粉媒介者・野草の多様性と草地収量のトレードオフ Trade-off between pollinator-wildflower diversity & grassland yields

Nicholas J. Balfour,Ciaran Harris,Jonathan Storkey & Francis L. W. Ratnieks
npj Biodiversity  Published:20 January 2025
DOI:https://doi.org/10.1038/s44185-024-00070-6

肥料使用の増加は花や昆虫の数を激減させるという新しい研究結果(New study finds increasing fertiliser use drastically reduces the number of flowers and insects)

Abstract

This is a critical moment for land use policy globally, with many countries (e.g. the UK and the European Union) currently undertaking significant green reforms of their agricultural policies. Despite their importance for maintaining agricultural outputs and plant diversity, the effects of artificial soil enrichment on pollinators remain poorly understood. Our two-year study at the world’s longest-running ecological experiment, Park Grass, Rothamsted, examines the relationship between soil fertilisation, grassland yield and biodiversity. Our data show a large and significant negative effect of the major plant nutrients (NPK) on the abundance, species richness and functional diversity of both pollinators and flowering plants. The results also indicate a large and significant trade-off between productivity and biodiversity. Our findings are a salutary reminder of the challenge in reconciling conflicting aims in farmland management and strongly suggest that financial incentives are necessary to offset yield reductions to improve biodiversity outcomes in agricultural grasslands.

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