Directional silviculture experiment and benefits of natural secondary broad - leaf forest 次生阔叶林定向培育试验及效益研究
2.
The measurement of developing cutting and silviculture business of forest industvy in shanxi 陕西森工采育企业产业发展对策探讨
3.
The techniques used in selection of superior trees from major coniferous species for silviculture 主要针叶造林树种优树选择技术
4.
Office director , silviculture , a key discipline at the provincial level , zhejiang forestry university 浙江林学院森林培育省级重点学科办公室主任
5.
Preliminary report on silviculture experiment of four species at karst mountainous area of southeast yunnan 滇东南岩溶山区4个针阔叶树种造林试验初报
6.
The zambeze valley also includes 5 . 5 million hectares of land that could be used for irrigated agriculture , cattle farming , silviculture , ecotourism and other activities 赞比西河谷有550万公顷土地可用于农业、畜牧、造林、生态旅游及其它活动。
7.
Quite a few pilot research projects have been carried out . on demonstrating new silviculture techniques for re - vegetation in dhv , but there still exist great difficulties in carrying out large - scale afforestation engineering 目前已经开展了一系列的有关造林技术的前期研究项目，但大规模的造林培育工程尚难以开展。
8.
Due to the detrimental effects of soil disturbance , fertilization of perennial forage crops , established pastures , and silviculture systems ; are obviously highly dependent upon surface application on residue covered soil 在多年生牧草、牧场和造林体系上，由于翻动土壤会产生不利影响，施肥显然主要是在有残茬的土壤上表施。
9.
Faced with an increasing demand for wood and paper products along with diminishing forest resources , china imports timber from many countries , including russia , indonesia , south america , and central africa . these regions have significant problems such as illegal logging and forest crimes , loss of natural forest to agriculture and silviculture and loss of biodiversity 鉴于国内对木材和纸品的需求日益增加，森林资源却逐渐减少，中国分别从俄罗斯印尼和中非等多个国家输入木材，这些国家的非法伐木情况和森林罪行猖獗，而且天然森林遭改辟成耕地和造林地，以及生态多样性锐减等问题均十分严峻。
