河北燕山东段低山丘陵绿化研究

本文是根据三年的调查研究(共调查了约1000块标准地)和造试验林所取得的材料写成的。研究了油松林、栎林、刺槐林、灌丛和杨树林等的更新、造林以及经营方面的技术和营林体系问题。提出了在不能修筑窄带梯田发展干鲜果树的地段,提高森林覆盖率和林地生产力的育林措施。在林种搭配和营林体系选择方面,应因地制宜地采用封山育松栎林,营造刺槐薪炭林和小径材用材林,进行栎类播种造林和封养灌木林等。这是适应低山丘陵生态条件、经济有效的恢复森林植被的综合措施。

STUDY ON AFFORESTATION OF LOWER HILLY LAND IN THE EASTERN YANSHAN MOUNTAINS IN HEBEI

The paper is accomplished or. the basis of overall investigation (about 1,000 sample plots) and forestation experiments (about 30,000mu) in three years. The regeneration, forestation and management techniques of Chinese pine (Pinus tabulaeformis Carr.) stand, oak stand, poplar stand and shrub, and their management systems were studied. Furthermore, the silviculture measures for raising forest cover percent and forest land productivity are put forward in the regions where the narrow band terrace can not be constructed to grow dry and fresh fruits. In collocation of forest classes and selection of silviculture systems, it is important to suit the local conditions. The measures, such as closing mountainous area for natural recovery of pine-oak stands and brushes, and establishment of fuel wood and small size wood plantations are strongly recommended, because all these measures have been proven suitable to ecological environment of hilly area, and economically reasonable for recovering the forest vegetation.