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青海地处高原,杨树扦插苗3—5年出圃才能达到造林质量要求,尤其是四旁和丰产林苗木的质量要求更高。目前各地育苗密度普遍较大,一般每亩在5,000株以上,其经济效益是值得研究的。扦插密度与苗木产量、质量、土地利用率及投资和效益关系密切,苗木质量对造林成活率、保存率、幼树生长量也有着直接的影响,因而依最佳技术经济效益确定扦插密度就成为高寒地区杨树育苗的关键技术之一。现就我场杨树育苗积累的资料整理于后,分析其技术经济效益。
Qinghai is located in the plateau, poplar cuttings 3-5 years out of nursery in order to meet the requirements of afforestation quality, especially around the high yielding seedlings and higher quality requirements. At present, the seedling density is generally large, generally more than 5,000 per acre, its economic benefits are worth studying. Cutting density is closely related to seedling yield, quality, land use efficiency, investment and benefits. Seedling quality has a direct impact on plantation survival rate, preservation rate and sapling growth rate. Therefore, determining the cutting density according to the best technical and economic benefits becomes Alpine region poplar nursery one of the key technologies. Now my field poplar nursery accumulation of information collected after the analysis of its technical and economic benefits.