ABSTRACT Litter decomposition plays a critical role in both nutrient cycling and the interspecific relationships between tree species. In this study, leaf litter from Robinia pseudoacacia was mixed with litter from 10 other species, this mixture was then ground and incubated in soil. The soil indexes (i.e., quantity of microbes, activities of enzymes, and chemical properties) were analyzed to study the effects of litter decomposition on soil properties and the interaction between the litters. If mixed separately with Larix principis-rupprechtii or Betula platyphylla, R. pseudoacacia litter exerted synergistic effects on the activities of most enzymes. The mixed litters of R. pseudoacacia and Pinus sylvestris var. mongolica or Ulmus pumila exerted synergistic effects on the soil available P. With regard to the soil properties as a whole, the mixed litters of R. pseudoacacia and B. platyphylla, Pinus tabulaeformis, P. sylvestris var. mongolica, or L. principis-rupprechtii exerted synergistic effects on soil during their decomposition. However, the mixed litters of R. pseudoacacia and Populus simonii, Quercus liaotungensis, U. pumila, or Caragana microphylla did not. This indicated that R. pseudoacacia mixed with the litter of other needle-leaf tree species benefits the development and regeneration of soil and thus can be used for sustainable forest management.

中文翻译：

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刺槐和十种树种落叶混合物对土壤性质的非加成效应

摘要 凋落物分解在养分循环和树种之间的种间关系中起着至关重要的作用。在这项研究中，刺槐的落叶与其他 10 个物种的落叶混合，然后将这种混合物研磨并在土壤中培养。分析土壤指标（即微生物数量、酶活性和化学性质）以研究凋落物分解对土壤性质的影响以及凋落物之间的相互作用。如果与落叶松或白桦单独混用，金合欢凋落物对大多数酶的活性有协同作用。R. pseudoacacia 和 Pinus sylvestris var. 的混合窝。蒙古或榆树对土壤有效磷产生协同作用。R. pseudoacacia 和 B. platyphylla、Pinus tabulaeformis、P. sylvestris var. 的混合窝。mongolica 或 L. principis-rupprechtii 在分解过程中对土壤产生协同作用。然而，刺槐和杨树、辽东栎、乌木或小叶锦鸡儿的混生窝则没有。这表明刺槐与其他针叶树种的凋落物混合有利于土壤的发育和更新，因此可用于可持续森林管理。