近日，
高产饲草草场往往物种多样性低，氮肥投入高。为了研究多物种混合作为替代策略，26个站点的国际“LegacyNet”实验系统地改变了播种草地的多样性，以六种高产饲料（草、豆科植物和草本植物）为主题，在适度氮投入下进行管理。多物种混合产生了两种主题广泛的草地实践：高氮肥的草地单一栽培和两种草-豆科植物群落。多物种杂交的高产是由草-豆科植物和豆科植物-草本植物的强正相互作用驱动的。在较温暖的地点，含豆科植物的多物种混合种植比单一栽培和高氮草的产量优势增加。改良的草地混合设计可以为更环保的草料生产提供信息，并可能增强高产草地对气候变暖的适应。
附：英文原文
Title: Multispecies grasslands produce more yield from lower nitrogen inputs across a climatic gradient
Author: James O’Malley, John A. Finn, Carsten S. Malisch, Matthias Suter, Sebastian T. Meyer, Giovanni Peratoner, Marie-Nolle Thivierge, Diego Abalos, Paul R. Adler, T. Martijn Bezemer, Alistair D. Black, shild Ergon, Barbara Golińska, Guylain Grange, Josef Hakl, Nyncke J. Hoekstra, Olivier Huguenin-Elie, Jingying Jing, Jacob M. Jungers, Julie Lajeunesse, Ralf Loges, Gatan Louarn, Andreas Lüscher, Thomas Moloney, Christopher K. Reynolds, Ievina Sturite, Ali Sultan Khan, Rishabh Vishwakarma, Yingjun Zhang, Feng Zhu, Caroline Brophy
Issue&Volume: 2025-12-04
Abstract: High-yielding forage grasslands frequently comprise low species diversity and receive high inputs of nitrogen fertilizer. To investigate multispecies mixtures as an alternative strategy, the 26-site international ‘LegacyNet’ experiment systematically varied the diversity of sown grasslands using up to six high-yielding forage species (grasses, legumes, and herbs), managed under moderate nitrogen inputs. Multispecies mixtures outyielded two widely used grassland practices: a grass monoculture with higher nitrogen fertilizer, and a two-species grass-legume community. High yields in multispecies mixtures were driven by strong positive grass-legume and legume-herb interactions. In warmer sites, the yield advantage of legume-containing multispecies mixtures over monocultures and the high-nitrogen grass increased. Improved design of grassland mixtures can inform more environmentally sustainable forage production and may enhance adaptation of productive grasslands to a warming climate.
DOI: ady0764
Source: https://www.science.org/doi/10.1126/science.ady0764