论文部分内容阅读
湿地松(Pinus Clli-ottii Englem)原产美国,因其生长快、杆形通直、适应性广、产脂量高、用途广泛。我国长江以南省份已广为引种栽培。近年,各地为了实现种子自给,纷纷选择优良的人工用材林,去劣留优,疏伐改建湿地松母树林。建立和经营湿地松母树林要抓好以下环节: 一、林分的选定湿地松母树林宜建立在中亚热带和南亚热带、夏季多雨、年雨量1100毫米以上的低山丘陵区。被选作母树林的林分应交通方便,地势平坦,土层深厚,土壤湿润,排水良好。
Pinus Clli-ottii Englem native to the United States, because of its fast growth, straight rod-shaped, wide adaptability, high fat yield, a wide range of uses. The provinces south of the Yangtze River in China have been widely introduced and cultivated. In recent years, in order to achieve seed self-sufficiency, all over the world have chosen excellent artificial timber forests to improve the quality of the forest and to transform and reconstruct the wetland pine forests. The establishment and management of wetland pine need to focus on the following links: First, the selection of the stand Wetland pine forests should be established in the subtropical and tropical South Asia, the summer rainy, annual rainfall of 1100 mm or more hilly areas. Forest was selected as the parent forest should be easily accessible, flat terrain, deep soil, soil moisture, well drained.