不同森林类型枯落物水文生态功能对比研究——以甘肃祁连山和云南元阳梯田水源林为例  

Comparison on Hydrological Ecological Function of Litter in Different Forest Types——Taking Qilian Mountains of Gansu Province and the Yuanyang Terrace of Yunnan Province as an Example

作　　者：蒋积荣 牛赟 苗毓鑫 

机构地区：[1]张掖市寺大隆林场,甘肃张掖734016 [2]甘肃省祁连山水源涵养林研究院甘肃省森林生态与冻土水文水资源重点实验室,甘肃张掖734000 [3]甘肃张掖生态科学研究院甘肃省祁连山生态科技创新服务平台,甘肃张掖734000

出　　处：《防护林科技》2015年第12期4-7,共4页Protection Forest Science and Technology

基　　金：国家自然科学基金项目(41461004);甘肃省基础研究创新群体课题(145RJIG337);甘肃省祁连山生态科技创新服务平台(144JTCG254)

摘　　要：选择甘肃祁连山和云南省元阳梯田水源林枯落物为研究对象,对野外调查数据进行对比分析,结果表明:(1)祁连山枯落物平均厚度3.17cm,平均蓄积量为27.67t·hm-2;元阳梯田枯落物平均厚度2.33cm,平均蓄积量为6.86t·hm-2;前者比后者的枯落物平均厚度大1.4倍,平均蓄积量大4倍。(2)祁连山枯落物平均最大持水量为79.01t·hm-2,平均最大持水率为294.05%;元阳梯田水源林枯落物平均最大持水量为4.76t·hm-2,平均持水率为173.46%;前者比后者的枯落物平均最大持水量大16.61倍,平均持水率大1.7倍。Taking water conservation forest of Qilian Mountains of Gansu Province and Yuanyang terrace of Yunnan Province as research object,through field investigation and comparison on data,result shows that:(1 )The average thickness and the average volume of litter is 3.1 7 cm & 27.67 t ·hm-2 ,respectively in Qilian Mountains;the aver-age thickness of litter is 2.33 cm and the average volume is 6.86 t·hm-2 in Yuanyang terrace.The average thick-ness and the average volume of the former is 1.4 and 4 times respectively larger than that of the latter.(2)The av-erage maximum water-holding capacity of litter is 79.01 t·hm-2 and the average maximum water holdup rate is 294.05% in Qilian Mountains;the average maximum water-holding capacity of litter is 4.76 t·hm-2 and the aver-age maximum water hold up is 1 73.46% in Yuanyang terrace;the average maximum water-holding capacity and the average maximum water hold up rate of the former is 1 6.61 and 1.7 times larger respectively than that of the latter.

关 键 词：枯落物 蓄水量 持水率 祁连山 元阳梯田 

分 类 号：S715[农业科学—林学]