森林经营方式对不同林龄落叶松林枯落物 及土壤水源涵养能力的影响.

The effects of forest management methods on the understory litter and soil water conservation capacity of Larix principisrupprechtii forests of different ages were studied to provide a theoretical basis for the formulation of Larix principis-rupprechtii plantation management and soil and water conservation measures in the study area. In August 2021, young forests, near-mature forests and mature forests of Larix principis-rupprechtii under near-natural management, conventional management and non-management measures were selected as the research objects in Wangyedian Forest Farm, Chifeng City, the method of field survey and sampling combined with indoor experimental analysis was used to compare and analyze the water holding capacity of understory litter and soil in young Larix principis-rupprechtii forest, near-mature forest and mature forest under different management methods, and the entropy weight method was used to comprehensively evaluate the litter and soil water conservation capacity of Larix principis-rupprechtii forest. The results showed that: the total thickness of litter in 9 sample plots ranged from 2. 37 cm to 5. 83 cm, and the total volume of litter ranged from 11. 27 t / hm 2 to 37. 07 t / hm 2 . The maximum and effective water holding capacity of litter under different ages of Larix principis-rupprechtii forests showed the trend of mature forest>near-mature forest>young forest. The maximum and effective water holding capacity of litter under Larix principis-rupprechtii forest under different management modes showed the order of non-management>conventional management> near natural management. Soil total porosity, capillary porosity, saturated water capacity and capillary water capacity under different ages of Larix principis-rupprechtii stands had the regularities of young forest>mature forest>near-mature forest. Soil porosity and water holding capacity of Larix principis-rupprechtii forest under different management patterns showed the change rule of near-natural management>conventional management>non-management. Under non-management measures, the understory water conservation capacity of mature forest stage of Larix principis-rupprechtii forest was the highest; under conventional management measures, the understory water conservation capacity of young forest stage was second, and the understory water conservation capacity of near-mature forest stage under conventional management measures was the lowest. [ABSTRACT FROM AUTHOR]