摘要
为了解楠杆自然保护区不同植被类型枯落物的储量和持水特性,以保护区9种不同植被类型作为研究对象,分别对枯落物储量、持水量和持水过程进行分析。结果表明,(1)不同植被类型下的枯落物层平均厚度在1.15-4.57cm之间,大小顺序为落叶阔叶林>杉木林>马尾松林>麻栎林>竹林>灌木林>针阔混交林>杨树林>华山松林;枯落物蓄积量为1.13-11.36t/hm^2,大小顺序为杉木林>马尾松林>竹林>落叶阔叶林>针阔混交林>麻栎林>灌木林>华山松林>杨树林。(2)9种不同植被类型下的枯落物最大持水量在3.817 9-21.405 3t/hm^2之间,其大小顺序为杉木林>马尾松林>竹林>落叶阔叶林>麻栎林>针阔混交林>华山松林>灌木林>杨树林;枯落物最大持水率为336.46%-460.45%,表现为落叶阔叶林>马尾松林>华山松林>麻栎林>灌木林>竹林>杉木林>针阔混交林>杨树林。(3)9种不同植被类型下的枯落物持水量随浸泡时间增加而增加,未分解层和半分解层持水量分别在12h和1.5h基本达到饱和,吸水速率随浸泡时间的增加而减小,在前5min内速率最大,而未分解层和半分解层持水速率分别在12h和1.5h之后趋近于零。
In order to know the water conservation function of forest litter in the nature reserve of Nangan,the hydrological function of litter layer was studied by using 9 different types of forest stand as the object. The results showed that:( 1) Under different forest types,the average litter layer with thickness was 1. 15-4. 57 cm,and the litter amount was 1. 13-11. 36 t/hm^2,among which the maximum amount of litter accumulation was Cunninghamia lanceolata forest and the smallest was Populus forest;( 2) Litter maximum water holding rate was 336. 46% -460. 45% ,deciduous broad-leaved forest was maximum and Populus forest was minimum; The maximum water holding capacity was 3. 817 9-21. 405 3 t/hm^2,the maximum water holding capacity of Cunninghamia lanceolata,Populus( 3. 817 9 t/hm^2) minimum.( 3) The litter water holding capacity of 9 different forest types increased with the soaking time,the water holding capacity of UN decomposed and semi decomposed layers reached saturation at 12 h and 1. 5 h,respectively. And the water absorption rate increases with the immersion time decreases,the maximum rate in the 5 min,while the undecomposed and semi decomposed layer water holding rate close to zero after 12 h and 1. 5 h.
出处
《西部林业科学》
CAS
北大核心
2018年第1期104-109,126,共7页
Journal of West China Forestry Science
基金
贵州省科技重大专项项目(黔科合JZ字[2014]200211
黔科合重大专项字[2016]3022-06号)
国家环保部生物多样性保护专项资金项目(kksbdyj01)
贵州省社发攻关项目(黔科合SY字[2013]3165号)
关键词
枯落物
蓄积量
最大持水量
最大持水率
持水过程
litter
accumulation
maximum water holding capacity
maximum water holding rate
course of water holding
