Abstract: Permanent sample plots were laid under forest types of different bioclimate zone between 1200-4300 m above sea leval in the Wolong Natural Reserve. Five mountain forest soil types were chosen for the sample plots: 1. mountain yellow soils under the evergreen forest, 2. mountain brown forest soils under the deciduous and broad-leaved forest, 3. mountain dark brown forest soils under the coniferous deciduous and broadleaved mixed forest , 4 . mountain brown dark coniferous forest soils Under the pure fir forest, 5. alpine meadow soils under the alpine meadow zone. Observation began in 1981 and ended in 1984. This article had shown chemical composition of lysimetric solution and soil respiratory intensity of the mountain forest soils in the Wolong Naturol Reserve. Organic C, HCO₃^-, Ca²⁺, Cl^- were the hightest content in the chemical composition of lysimetric solution, It's systematric arrangement were. Organic C>HCO₃^->Ca²⁺>Cl^->Mg²⁺>K⁺>hydrolyable N>Si⁴⁺>available P> Fe²⁺>Al³⁺>Fe³⁺>CO₃^2-; systematric arrangement of soil respiratory intensity were mountain yellow soils>mcuntain brown soils>mountain dark brown soils>mountain brown dark coniferous forest soils>alpine meadow soils. Growth seasonal variations of elemental content of lysimetric soiution and respiratory intensity were slightly evidente, but it's annual variations were no evidence.

Key words: Lysimetric solution, Chemical composition, Soil respiratory intensity, Mountain forest soil