论文部分内容阅读
提高造林成活率是成林成材的基础。也是绿化荒山,加快我省三北防护林体系,实现2000年基本绿化辽宁的重要措施。同时也是少花钱,多造林的重要捷径,有事半功倍的效果。我省三北防护林建设自1978年以来,经过15个年头的建设,造林保存面积7333km~2(其中:第一期工程4227km~2)。随着三北防护林体系建设的进展,造林技术的不断提高,专业队伍不断的扩大,各项责任制进一步得到落实,造林成活率(合格率)也不断提高。造林合格率由一期工程的50％(1978年以前为30％),二期工程上升到65％(1990年以前统计)。1992年在辽西大旱之年的情况下,朝阳地区的造林合格率仍达到75.5％
Increasing the survival rate of afforestation is the foundation of a successful forest. But also afforested barren hills, speed up the province’s Three North Shelterbelt system, to achieve the basic greening of Liaoning in 2000 an important measure. At the same time, it is also an important shortcut for reducing costs and afforestation, with a multiplier effect. Since 1978, the construction of the Three-North Shelterbelt in Shaanxi Province has maintained a total area of 7333km ~ 2 (including 4227km ~ 2 in the first phase) after 15 years of construction. With the progress of the construction of the Three-North Shelterbelt System, the improvement of afforestation technology, the continual expansion of professional teams, various accountability systems have been further implemented, and the survival rate of afforestation (pass rate) has also been continuously improved. The rate of afforestation pass from 50% of the first phase (30% before 1978), the second phase to 65% (before 1990 statistics). In the case of drought in western Liaoning in 1992, the afforestation pass rate in Chaoyang still reached 75.5%