摘要
寒冻雏形土不同地形部位土壤湿度均有较高的水平 ,0cm～ 6 0cm整层土壤湿度北坡 >滩地 >南坡。土壤湿度在年内可分为春季水分消耗期、雨季初水分补给期、水分波动消耗期和冬季冻结水分稳定聚集期。在垂直方向随深度加深湿度逐渐降低 ,北坡极为明显 ,南坡及滩地降低幅度均匀。土壤湿度随时间的变化过程分解为周期性变化项、随机性分量项及趋势项。同时表明 ,在土壤湿度较低的南坡 ,以小嵩草等为主的草原化草甸植被类型 ;土壤湿度适中的滩地 ,多以矮嵩草为主的高寒嵩草草甸植被类型 ;湿度较高的北坡 ,多以金露梅为主的灌丛草甸植被类型 ;而在土壤湿度很高、地表长久积水的河边 。
The soil moisture change of the Mat_Cryic Cambisols at different topographic position was analyaed.We can conclude that soil moisture is high,and it is north slope_land>valley plain>south slope_land at the depth of 0～6 cm .The change of soil moisture is divided as four periods which are water consuming period in spring,water supply period in the beginning of rainy season,water fluctuation consuming period,frozen water steady sinking period in winter,respectively.The soil moistrue is gradually decreased from topground to bottom ground,which is showed the most significant at north slope_land,and the soil moistrre decrease is even at south slope_land or valley plain.Soil moisture with the change of season is divided an periodic part,random part,and trending part.
出处
《山地学报》
CSCD
2001年第3期220-225,共6页
Mountain Research
基金
国家与中科院"九五"重大项目
特别支持项目(19980 40 80 0
KZ95 1-AI -2 0 4
KZ95 1-AI -30 1
KZ95T -0 6 )
中国科学院海北高寒
关键词
寒冻雏形土
不同地形部位
土壤湿度
植被类型
the Mat_Cryic Cambisols
different topographic position
soil moisture
vegetation type
