赣江源不同密度针叶林枯落物持水特征  

Litter water-reserving characteristics of coniferous forest with different densities in the source area of Ganjiang River

作　　者：王丽艳[1] 刘光正[1] 林小凡[1] 金洪平 黄文超[1] 

机构地区：[1]江西省林业科学院,江西南昌330013

出　　处：《南方林业科学》2015年第6期45-48,共4页South China Forestry Science

基　　金：国家科技支撑计划项目"鄱阳湖生态经济区建设生态环境保护关键技术研究及示范"子课题"人工针叶林结构优化技术集成研究"(编号:2012BAC11B05-1);江西省林业财政重大专项"鄱阳湖流域"五河"及东江源头杉木低效林改造技术集成与示范"(编号:2011510102)

摘　　要：对赣江源不同密度湿地松和马尾松林分枯落物蓄积和持水量进行了研究。结果表明:(1)赣江源湿地松林枯落物的蓄积量高于马尾松林分,湿地松林分在密度为2 000株/hm^2时,枯落物蓄积量最大19.76 t/hm^2,马尾松林密度为1 500株/hm2时,枯落物的蓄积量为9.88 t/hm^2。(2)赣江源湿地松林枯落物持水量和拦蓄水量较高,尤其是湿地松2 125株/hm^2密度林下,枯落物的最大持水量为35.55 t/hm2,有效拦蓄水量25.97 t/hm^2,不同密度马尾松林下枯落物最大持水量、有效拦截水量较高为1 500株/hm2分别为28.59 t/hm2、17.30 t/hm^2。(3)不同密度湿地松和马尾松林分枯落物持水速率与侵泡时间t之间的关系,用对数函数y=a1n(x)+b拟合度较高,其相关系数R^2>0.93。The litter amount and water preserving capacity of different densities of Pinus elliottii and P. massoniana plantation in the source area of Ganjiang River were researched. The results showed that： 1） The litter accumulation of P.elliottii forest was higher than P. massoniana plantation, and the biggest value was 19.76 t/hm^2 in P. elliottii plantation with the density of 2 000 plants/hm^2. The litter accumulation of P. massoniana plantation in density of 1 500 plants/hm^2 was 9.88t/hm^2. 2） The maximum water-preserving capacity and the modified water-preserving capacity were large in P. elliottii plantation, the maximum water-preserving capacity was 35.55 t/hm^2, the modified interception water capacity of litter was25.97 t/hm^2. In 1 500 plant/hm^2 P. massoniana plantation,the largest water-preserving capacity was 28.59 t/hm^2, and the modified interception water capacity of litter was 17.30 t/hm^2. 3） The relationship of water preserving rate of litter in P.elliottii and P. massoniana plantation and immersion time is：y=a1n（x）＋b（R^20.93）, its correlation coefficient was that R^20.93.

关 键 词：湿地松 马尾松 枯落物持水量 持水速率 

分 类 号：S714[农业科学—林学] S791