山地森林土壤渗滤液化学组成及生物活动强度的研究

研究工作在卧龙自然保护区(北纬30°45′—31°25′,东经102°52′—103°24′)海拔1200—4300m垂直带中的五块试验林地上进行。五块试验林地是:(1)中亚热带以壳斗科和樟科为主的常绿阔叶林下的山地黄壤试验林地(海拔1200m);(2)具有暖温带气候特征的次生椴、槭落叶阔叶林下的山地棕壤试验林地(海拔2000m);(3)具有温带气候特征的铁杉、槭、桦针阔混交林下山地暗棕壤试验林地(海拔2500m);(4)具有寒温带气候特征的暗针叶岷江冷杉林下的山地棕色暗针叶林土试验林地(海拔3300m);(5)具有亚寒带气候特征的高山草甸植被下的高山草甸土试验林地(海拔4300)。

STUDIES ON CHEMICAL COMPOSITION OF LYSIMETRIC SOLUTION AND SOIL RESPIRATORY INTENSITY OF THE MOUNTAIN FOREST SOILS

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, HCO_3~-, Ca~(2+), Cl~- were the hightest content in the chemical composition of lysimetric solution, It's systematric arrangement were. Organic C>HCO_3~->Ca~(2+)>Cl~->Mg~(2+)>K~+>hydrolyable N>Si~(4+)>available P> Fe~(2+)>Al~(3+)>Fe~(3+)>CO_3~(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.