Abstract Litter decomposition is a key process of nutrient cycling in ecosystems, and has been studied in a wide range of grasslands, including the steppes on the Mongolian Plateau. However, information is hardly available on the responses of grassland litter decomposition to different land-use types, especially if the litters produced from grazing or mowing grasslands have home-field advantage in decomposition. In a five-year field experiment examining the effects of land-use types on grassland ecosystems in central Inner Mongolia, we determined the litter decomposition rate and quality indicators of three dominant steppe plants (Leymus chinensis, Stipa krylovii and Cleistogenes squarrosa) produced in grazing, mowing or enclosed grasslands, both in their respective home habitats versus in reciprocally displaced habitats. We found that (i) the litters from the grazing grassland had higher decomposition rate than that from enclosed grassland, especially when all litters were placed in the enclosed grassland; and the decomposition rate was negatively related with the C/N ratio, lignin concentration and lignin/N ratio in litters (P

中文翻译：

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不同土地利用类型的半干旱草原优势植物凋落物分解率的变化：土壤水分，而不是家园优势，起主导作用

摘要 凋落物分解是生态系统中养分循环的关键过程，已在包括蒙古高原草原在内的广泛草原中进行了研究。然而，关于草地凋落物分解对不同土地利用类型的响应的信息很难获得，特别是如果放牧或割草草地产生的凋落物在分解中具有主场优势。在一项为期五年的内蒙古中部土地利用类型对草地生态系统影响的田间试验中，我们确定了放牧中产生的三种优势草原植物（羊草、克氏针茅和方隐花）的凋落物分解率和质量指标。 ，割草或封闭的草原，无论是在各自的家庭栖息地还是在相互转移的栖息地。我们发现（i）放牧草地的凋落物比封闭草地的分解率更高，尤其是当所有凋落物都放置在封闭草地时；分解速率与枯枝落叶中C/N比、木质素浓度和木质素/N比呈负相关（P