川南退耕丛生竹林枯落物持水特性研究  

Study on Water-holding Capacity of Litter Layers in Returning Farmland to Sympodial Bamboo Forests in Southern of Sichuan Province

作　　者：张大鹏[1] 范少辉[1] 蔡春菊[1] 刘广路[1] 刘亚迪[1] 

机构地区：[1]国际竹藤中心,国家林业局竹藤科学与技术重点实验室,北京100102

出　　处：《水土保持研究》2012年第5期181-184,189,共5页Research of Soil and Water Conservation

基　　金：林业公益性行业科研专项项目“退耕竹林水土保持功能高效经营技术研究”(201104021)

摘　　要：以四川省长宁县退耕梁山慈竹、撑绿杂交竹3号(以下简称撑绿竹)和硬头黄竹3种丛生竹林为对象,对其枯落物蓄积量及持水特性进行了研究。结果表明:不同种类丛生竹枯落物厚度为33～51mm,蓄积量为6.88～9.46t/hm2,其大小顺序为:梁山慈竹>硬头黄竹>撑绿竹;浸泡持水实验表明,不同枯落物持水量、吸水速率与浸水时间的动态变化具有相似的规律性:0～2h变化最快,2～8h逐渐减缓,8h以后基本饱和,并分别得出其相关关系;不同枯落物最大持水量、最大拦蓄量和有效拦蓄量变化规律一致,最高为梁山慈竹,分别达到了36.52,32.53,27.05t/hm2,其次为硬头黄竹,分别为30.33,28.33,23.83t/hm2,最低的为撑绿竹,仅为28.35,25.89,21.63t/hm2。To investigate the litter amount and water-holding capacity under de-farming bamboo forests, Dendrocalamus （D） farinosus, Bambusa （B） pervariabilis ）〈 Dendrocalarnopsis （D） daii 3 and Bambusa （B） rigida, taking from Changning County of Sichuan Province, were determined in this paper. It could be con- cluded that thickness variation was from 33 mm to 51 mm and the litter amount changed from 6.88 t/hm~ to 9.46 t/hm2 under three different types of bamboo plantations. Litter amount of D farinosus was the most and that of B. pervariabilis X D. daii was the least. Results also showed that dynamic changes of water- holding capacity, water absorption rate and immersion time of different litter was similar. The rapid changes were observed within 0-2 h, and then it slowly changed in the following six hours. The change stabilized after 8 h. Water-h01ding capacity, interception rate and the effective interception rate of D. farinosus were the best and the values were 36.52, 32.53, 27.05 t/hm2, respectively. The next wasB. rigida （30.33, 28.33, 23.83 t/hm2） and the last wasB. pervariabilisXD, daii （28.35, 25.89,21.63 t/hm2）.

关 键 词：丛生竹 枯落物 持水特性 梁山慈竹 撑绿竹 硬头黄竹 

分 类 号：S715.5[农业科学—林学]