本文通过对辽东地区落叶松人工林连我与土壤水分、容重、孔隙度等物理性质及林木生长关系的研究，认为落叶松人工林连栽地力衰退的原因之一是土壤物理性质恶化所致。 Based on the study of the relationship between Larch plantation and the physical properties such as soil water content, bulk density and porosity, and tree growth in Liao Tung area, it is considered that one of the reasons for the decline of the soil fertility of Larix gmelinii plantation is the deterioration of soil physical properties.