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Meta-analysis shows that plant mixtures increase soil phosphorus availability and plant productivity in diverse ecosystems
Nature Ecology & Evolution ( IF 16.8 ) Pub Date : 2022-06-27 , DOI: 10.1038/s41559-022-01794-z
Xinli Chen 1 , Han Y H Chen 2 , Scott X Chang 1, 3
Affiliation  

Soil phosphorus (P) availability is critical to plant productivity in many terrestrial ecosystems. How soil P availability responds to changes in plant diversity remains uncertain, despite the global crisis of rapid biodiversity loss. Our meta-analysis based on 180 studies across various ecosystems (croplands, grasslands, forests and pot experiments) shows that, on average, soil total P, phosphatase activity and available P are 6.8%, 8.5% and 4.6%, respectively, higher in species mixtures than in monocultures. The mixture effect on phosphatase activity becomes more positive with increasing species and functional group richness, with more pronounced increases in the rhizosphere than in the bulk soil. The mixture effects on soil-available P in the bulk soil do not change, but with increasing species or functional group richness these effects in the rhizosphere soil shift from positive to negative. Nonetheless, enhanced soil phosphatase activity stimulated available P in diverse species mixtures, offsetting increased plant uptake effects that decrease soil-available P. Moreover, the enhancement effects of species richness on soil phosphatase activity are positively associated with increased plant productivity. Our findings highlight that preserving plant diversity could increase soil phosphatase activity and P availability, which sustain the current and future productivity of terrestrial ecosystems.



中文翻译:

荟萃分析表明,植物混合物增加了不同生态系统中土壤磷的有效性和植物生产力

土壤磷 (P) 可用性对许多陆地生态系统中的植物生产力至关重要。尽管存在生物多样性迅速丧失的全球危机,但土壤磷的可用性如何响应植物多样性的变化仍不确定。我们基于 180 项不同生态系统(农田、草地、森林和盆栽试验)研究的荟萃分析表明,平均而言,土壤总磷、磷酸酶活性和有效磷分别为 6.8%、8.5% 和 4.6%,高于物种混合比单一栽培。随着物种和官能团丰富度的增加,混合物对磷酸酶活性的影响变得更加积极,根际土壤中的增加比大块土壤中的增加更明显。混合效应对大块土壤中土壤有效磷的影响没有改变,但随着物种或官能团丰富度的增加,这些对根际土壤的影响从正面转变为负面。尽管如此,增强的土壤磷酸酶活性刺激了不同物种混合物中的有效磷,抵消了减少土壤有效磷的植物吸收增加的影响。此外,物种丰富度对土壤磷酸酶活性的增强作用与植物生产力的提高呈正相关。我们的研究结果强调,保护植物多样性可以增加土壤磷酸酶活性和磷的可用性,从而维持陆地生态系统当前和未来的生产力。抵消了减少土壤有效磷的植物吸收增加的影响。此外,物种丰富度对土壤磷酸酶活性的增强作用与植物生产力的提高呈正相关。我们的研究结果强调,保护植物多样性可以增加土壤磷酸酶活性和磷的可用性,从而维持陆地生态系统当前和未来的生产力。抵消了减少土壤有效磷的植物吸收增加的影响。此外,物种丰富度对土壤磷酸酶活性的增强作用与植物生产力的提高呈正相关。我们的研究结果强调,保护植物多样性可以增加土壤磷酸酶活性和磷的可用性,从而维持陆地生态系统当前和未来的生产力。

更新日期:2022-06-28
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