海拔对毛竹林土壤物理性质和水分特性的影响.pdfVIP

/ 1 1 1 2 陈双林 , 杨清平, 郭子武 , 邹跃国 ( 1. , 311400; 2. ) : 在毛竹分布南缘的中亚热带与南亚热带气候过渡区, 选 土壤类型坡度坡向经营水平等一致的 3 个 海拔梯度毛竹林, 对土壤物理性质和水分特性指标进行了测定, 结果表明: 相同海拔梯度毛竹林随土层的加深, 土 壤容重总孔隙度非毛管孔隙度饱和持水量田间持水量粘粒和砂粒含量增大, 而毛管孔隙度和粉粒含量减小; 海拔对毛竹林30 cm土层的土壤容重总孔隙度毛管孔隙度田间持水量影响不显著, 而土壤非毛管孔隙度饱和 持水量随海拔升高而显著增大; 不同海拔梯度毛竹林 30 cm土层的土壤微结构颗粒组成为砂粒 粉粒 粘粒, 粘 粒粉粒含量随海拔升高而减小, 砂粒含量趋于增大; 试验区随海拔的升高, 土壤物理性质和水分特性趋于有利于 毛竹林生长变化 : 毛竹; 海拔; 土壤物理性质; 土壤水分特性 Influences ofAltitude on PhysicalPropertiesandM oistureCharacteristicsofSoil inMosoBambooPlan- tationM CHEN Shuang-lin, YANG Q ing- ing, GUO Zi-wu, ZOU Yue-guo Abstract:The three moso bamboo lantations w ith the sam e soil ty e, slo e grad ient, slo e as ect, and m anagem en t level at three altitudeswere chosen to study the hysical ro erties and m oisture characteristics of soils in the areas bewt een m id- dle sub tro ical and south subtro ica.l The resu lts show ed that w ith the soil de th increasing, soil bu lk density, total soil oros ity, non-ca illary orosity, saturatedw ater ca acity, field w ater ca acity, and content of sand and clay increased in them oso lantations at the sam e altitude, but ca illary orosity and silt content decreased. In the de th of 0~ 30 cm, the altitude had no sign ificant influences on soil bu lk density, total soil orosity, ca illary orosity, and field water ca acity, but non-ca illary oros ity, saturatedwater ca acity increased sign ificantly w ith the altitude increasing. The con tent of silt in the soils ( 0~ 30 cm ) was greater than the clay con tent but less than the sand conten t in the three altitudes, andw ith alti- tude increa