论文部分内容阅读
杨树在我国分布广范,在生态建设中发挥了重要作用,但由于自然灾害、品种退化、更新不及时等原因,造成杨树低效林在全国尤其是三北地区普遍存在。杨树伐根嫁接具有经济、节水、环保的优点,是杨树低效林更新的优选方法。分析伐根嫁接林地的生产力、经济效益、生态效益和社会效益,明确伐根嫁接更新造林优势,可带动并加快衰老低效杨树防护林更新改造速度,提高林地效益。
Poplar is widely distributed in our country and played an important role in ecological construction. However, due to natural disasters, the degeneration of species and the untimely update, poplar inefficient forests are prevalent in the whole country, especially in the Three North regions. Poplar rooting with economic, water-saving, environmental protection advantages, is the preferred method of poplar inefficient forest regeneration. Analyzing the productivity, economic benefits, ecological benefits and social benefits of spruce-grafted forest land, and clarifying the advantages of cutting-root grafting and reforestation, can promote and speed up the rebuilding of aging and inefficient poplar shelterbelt, and improve the benefits of woodland.