摘要
迭部林区每年采伐面积约1,700公顷,每年更新采伐迹地约1,400公顷,荒山造林约500公顷。大面积岷江冷杉林,青杄林,紫果云杉等原始森林采伐后,皆用粗皮云杉苗木更新造林。由于树种选择不当,冷杉林迹地人工云杉林保存率低且锈病严重,难以成林成材。这种采伐优良树种为建群种林分,更折不适生树种苗木或劣等树种苗木的“取优代劣”问题,在本区各林场普遍存在。迭部林区现有优良森林经营树种10余种,辅助树种10余种,珍稀造林树种5种。科学地区划森林经营造林树种,推广繁殖优良乡土树种,探索原始森林异域异居群的小区分居规律,营造团状混交林,优化后备森林资源,是发展迭部林区,保证青山常在,永续利用的必需措施。
In the forest of Diebu county, the annual cutting-area was about 1700 hectares, the annual regeneration area of cutting-blank was about 1400 hectares, the annual afforestation area was about 500 hectares. After the considerable area of primitive forests such as Abies faxoniana, Picea wilsonii, Picea purpurea forest were cut up, the nursery stock of Picea apesrata had been used to regeneration and planting. Since theunproper species had been selected, reserve rate of Picea as perata plantation was lower and rust disease was serious, therefore it was difficult to establish a woods for timber. Replacing excellent species with inferiority had beena common problem in every forestry farm of the forest. There are more than 10 excellent species for management, more than 10 accessory species and 5 precious planting species. Scientifically carrying out the division of management and planting species, breeding and popularizing excellent native species, seeking for the law by that primitive forests distributed in different region and microstrand, planting mixed forest in groups, optimizing forest reserves would be neceessary measures to develop the forestry of Diebu county, and to ensure the hills green forever and the forest reserves inexhaustible.
出处
《甘肃农业大学学报》
CAS
CSCD
1990年第4期421-429,共9页
Journal of Gansu Agricultural University
关键词
森林
经营
造林
树种
区划
树种
division of species
management and planting species
cutting blank
regeneration and planting
