关键词: 果园生草, 芒果园, 杂草多样性, 群落结构

Abstract: To analyze the effects of artificial grass on weed diversity and community structure in Mango orchard， five leguminous grasses， Stylosanthes guianensis， Indigofera hendecaphylla， Medicago sativa， Trifolium pratense and Macroptilium lathyroides， were used to carry out grassing experiments in Mango orchard， and natural grass treatment in Mango orchard was used as control. The effects of artificial grass on the niche， diversity， community structure similarity and functional groups of weeds in Mango orchard were studied. The results indicated that， compared to natural grass cover， all five artificial grassing models effectively reduced the biomass， species count， individual count， and ACE （Abundance-based Coverage Estimator） values of weeds in mango orchard， while enhancing the weed diversity in the dry-hot valley regions. The introduction of artificial grassing impacted the niche breadth and overlap of weeds in Mango orchard， altering their ecological niches， functional groups， and community structures， and increased the ecological stability of the orchards. Among the five artificial grassing models， the Indigofera hendecaphylla grassing model exhibited higher weed diversity and lower weed biomass， making it the most ideal weed management strategy for mango orchard in the dry-hot valley region.

Key words: Orchard grass, Mango orchard, Weed diversity, Community structure