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为提高白俄罗斯森林生产率建立了选种基地,其中包括松、云杉正号树1400株以上,这些树种的正号林分约120块,面积为651公顷。为评定正号树的遗传性,自1966年开始设置了专门的试验圃:松树在列宁试验林管区,立地条件为B_2型,5.4公顷;云杉在奥西波维斯克林管区,B_3型,2.6公顷。鉴定了1300株正号树后代,并从73个林管区松林和云杉林中选取了中等树木进行评比。 整个试验重复2—3次,植苗34000株以上。为便于评比,中等树与正号树栽在一起,从1966—1970年,系统地对所有移植苗进行了生长和形态观察。
In order to increase the productivity of Belarusian forests, seed selection bases have been set up, including more than 1,400 pine and spruce trees, with a total area of 651 hectares of positive 120 stands. In order to assess the heritability of the positive tree, special experimental plots have been set up since 1966: pine stands in the Lenin experimental forest zone with site conditions of type B_2 and 5.4 hectares; spruce in the Osspo Wesclin forest zone, type B 3, 2.6 Hectare. A total of 1300 positive tree progenies were identified, and the middle trees were selected from pine forest and spruce forest in 73 forest regions for comparison. The entire experiment repeated 2-3 times, more than 34,000 plantlets. In order to facilitate the appraisal, medium-sized trees and positive trees were planted together. From 1966 to 1970, all the transplanted seedlings were systematically observed for their growth and morphology.