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本文探讨选优和采用插条法繁殖桉树优树,采用高产无性系作为纸浆生产是有可能的, 这一作品叙述优树选择标准和确定木材基本密度和纸浆得率的方法。同时,还讨论母树的材质与其生长在不同土壤类型上的无性系植株的材质之间的关系。强调“无性系×土壤”的互相作用,说明这种互相作用是怎样影响材质,以至影响木材消耗率的。简介阿拉克鲁兹林业项目始于1967年。在里约北部,巴西东海岸的伊斯怕里多与圣多州这两个区域营造桉树林。在阿拉克鲁兹境内的林区,面积为5.5万公顷,另一区域在圣马多斯和巴拉两县境内,面积为4.5万公顷。桉树总种植纯面积为7万公顷,其余包括天然林,河湖道路和建筑。其纸浆厂于1978年10月投产,生产能力为45.6万吨/年桉树漂白纸浆。 1967～79年,主要种植种子来自巴西、津巴布韦和南非的巨桉。三年生时我们观察到群体间和群体内存在较大的基因差异,就从这些人工林中我们选择了优树,用作插条繁殖。选优
This article explores the selection and selection of elite trees using cuttings and the use of high-yielding clones as pulp production. This work describes the selection criteria for elite trees and the methods for determining the basic wood density and pulp yield. At the same time, the relationship between the material of the mother tree and the material of clonal plants grown on different soil types was also discussed. Emphasize the interaction of “clones × soils” and show how this interaction affects the material and thus the wood consumption rate. Brief introduction The Arak Luz forestry project began in 1967. In the north of Rio, eucalypt forests are built in the two regions of Escondido and Sao Tome on the east coast of Brazil. The forest area in Alacaz has an area of 55,000 hectares and the other area covers 45,000 hectares in the counties of San Mateos and Barra. The total area planted with eucalyptus is 70,000 hectares, with the rest including natural forests, rivers and lakes roads and buildings. Its pulp mill was put into operation in October 1978 with a production capacity of 456,000 tons / year of eucalyptus bleached pulp. From 1967 to 1979, the main planted seeds came from giant eucalyptus in Brazil, Zimbabwe and South Africa. When we observed large genetic differences among the groups and within the three-year-olds, we chose the best trees from these plantations and used them for the breeding of cuttings. Excellent selection