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Grasses procure key soil nutrients for clovers
Nature Plants ( IF 18.0 ) Pub Date : 2022-08-08 , DOI: 10.1038/s41477-022-01210-1
Zhang Wei 1 , Thomas Maxwell 1 , Brett Robinson 2 , Nicholas Dickinson 1
Affiliation  

Rhizobial nitrogen fixation in legumes provides spillover benefits to neighbouring plants such as pasture grasses. Generally, it is understood to be unidirectional between plant functional groups, providing a benefit from legumes to grasses. We question whether bidirectional complementarity also exists in terms of exploiting the wider soil nutrient pool. We test this hypothesis using soil cores with their component vegetation assemblages sampled from a hill country pasture in South Island, New Zealand. The soil was deficient in key essential elements: P, S, B, Mo and Ni. Facilitation from grasses to clovers was evident; legume–grass mixtures procured more nutrients from the soil than when either species was growing alone. When grasses and clover grow together in unfertilized grassland, more nitrogen is procured by the plant community, and other limiting plant nutrients in the soil are better exploited. Coexistence with grasses is favourable to clovers in terms of soil biogeochemistry.



中文翻译:

草为三叶草获取关键的土壤养分

豆科植物中的根瘤菌固氮作用为牧草等邻近植物提供了溢出效应。一般而言,植物功能组之间的单向性被理解为从豆科植物到草类植物都有益处。我们质疑在开发更广泛的土壤养分库方面是否也存在双向互补性。我们使用土芯及其从新西兰南岛山区牧场采样的植被组合来检验这一假设。土壤缺乏关键的必需元素:P、S、B、Mo 和 Ni。从草到三叶草的促进是显而易见的;豆科植物与禾本科植物的混合物从土壤中获得的养分比任何一种单独生长时都要多。当草和三叶草在未施肥的草地上一起生长时,植物群落会获得更多的氮,以及土壤中其他限制性植物养分得到更好的利用。就土壤生物地球化学而言,与草共存有利于三叶草。

更新日期:2022-08-08
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