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.
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
4.
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
5.
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。
6.
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。
7.
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。
8.
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。
