生态学报2004，Vol.24Issue(11)：2402-2411,10.
麻竹山地笋用林水文过程及养分动态
Hydrological process and nutrient dynamics in mountainous bamboo-shoot-oriented Dendrocalamus latiflorus stand
摘要
Abstract
The study on hydrological process and nutrient dynamics of Dendrocalamus latiflorus stand ecosystem was conducted in Nanjing National Forest Farm, Fujian Province. The results were presented in this paper. Within certain rainfall range, the canopy interception increased quickly with increasing rainfall during light rainfall events, but slightly during heavy rainfall events, and then tended to a fixed value. The relationship between canopy interception and precipitation was well simulated by the Richards Function. The canopy interception, through fall and stemflow exhibited significant seasonal dynamics, due to plentiful rainfall in wet season, the through fall and stemflow were much higher than those in dry season, while the canopy interception rate was much lower. The annual canopy interception amount, through fall and stemflow were 283.10 mm, 1720.45 mm, and 99.09 mm, respectively; and the annual average rate of canopy interception, through fall and stemflow were 13.47%, 81.82% and 4.71%, respectively. As to nutrient dynamics, 3 different ways of reclamation, overall ploughing, strip ploughing and ditch ploughing (regular management by farmers, only ditching around root zone in every March), were applied to the stands. The results showed that the annual loss of N, P, and K in surface runoff was the highest in over ploughed stand with K loss being the greatest among the three elements, 3.84 kg/hm2, followed by strip ploughed stand and ditch ploughed stand. Concerning the nutrient utility efficiency of the stand, the highest of 21.22% occurred in strip ploughed stand, followed by overall ploughed stand of 20.46%, and ditch ploughed stand of 19.61%. Moreover, the annual surplus of N, P and K in strip ploughed stand were 783.18 kg/hm2, 120.68 kg/hm2, and 184.50 kg/hm2, respectively, also being the lowest among three stands. In general, strip ploughing was worthy of being popularized in this region because it gained the highest economical profit without causing significantly increased soil erosion.关键词
麻竹/生态系统/水文/养分动态Key words
Dendrocalamus latiflorus/ecosystem/hydrological process/nutrient dynamic分类
农业科技引用本文复制引用
郑郁善,陈卓梅,陈礼光,陈羡德,邱黎苏,尤志达..麻竹山地笋用林水文过程及养分动态[J].生态学报,2004,24(11):2402-2411,10.基金项目
福建省科技厅重大科技资助项目(2002N001) （2002N001）
