六盘山不同森林群落地被物的持水特性  

Water Holding Characteristics of the Forest Floor in Liupan Mountain

作　　者：赵艳云[1,2] 程积民[1] 万惠娥[1] 胡相明[2] 

机构地区：[1]中国科学院水土保持与生态环境研究中心,杨凌712100 [2]滨州学院,滨州256600

出　　处：《林业科学》2009年第4期145-150,共6页Scientia Silvae Sinicae

基　　金：中国科学院重要方向项目(KZCX2-YW-441);国家重点基础研究发展计划973项目(2007CB106803);国家自然科学基金重点项目(40730631)

摘　　要：Water holding capacity,absorption rate and saturated water stock of a different forest’s floor were studied in Liu Pan Mountain.The results showed that at the beginning of dipping in water,the absorption rate was high,and then it leveled off with the time going on.Un-decomposed litter and half-decomposed litter were saturated with water in 2 and 4 h,respectively.Except Pinus tabulaeformis litter,water holding capacity of half-decomposed layer was 3.5 to 8 times as the dried weight and the water holding capacity of half-decomposed layer was 1.8 to 7.6 as the dried weight.The water holding capacity of broad-leaved litter was greater more than that of needle litter,and the capacity of moss was greater than branch litter.The water absorption rate was regressed to the time with the equation of Y=a+bt-1.Litter saturated water reflects hydrologic function.Litter saturated water Larix principis-rupprechtii and Quercus Liaotungensis were larger than other species in the valley.Additionally,there was abundant grass stock in Larix principis-rupprechtii and Betula platyphylla forest,and the grass water stock was respectively 5.4 t·hm-2,3.9 t·hm-2,which accounted for 9.3% and 12.0% of that of litter in the two forests.Water holding capacity, absorption rate and saturated water stock of a different forest＇ s floor were studied in Liu Pan Mountain. The results showed that at the beginning of dipping in water, the absorption rate was high, and then it leveled off with the time going on. Un-decomposed litter and half-decomposed litter were saturated with water in 2 and 4 h, respectively. Except Pinus tabulaeformis litter, water holding capacity of haff-decomposed layer was 3.5 to 8 times as the dried weight and the water holding capacity of half-decomposed layer was 1.8 to 7.6 as the dried weight. The water holding capacity of broad-leaved litter was greater more than that of needle litter, and the capacity of moss was greater than branch litter. The water absorption rate was regressed to the time with the equation of Y = a ＋ bt^-1. Litter saturated water reflects hydrologic function. Litter saturated water Larix principis-rupprechtii and Quercus Liaotungensis were larger than other species in the valley. Additionally, there was abundant grass stock in Lar/x principis-rupprechtii and Betula platyphylla forest, and the grass water stock was respectively 5.4 t·hm-2 , 3.9 t·hm-2 , which accounted for 9.3% and 12.0% of that of litter in the two forests.

关 键 词：持水特性 持水率 吸水速率 森林地被物 六盘山 

分 类 号：S715[农业科学—林学]