Observations on the annual growth in some dendrological species in the conditions of Iasi county

Abstract

Within the multitude of dendrological species, the species in the Cupressaceae family are of particular importance in the arrangement of green spaces and especially in the conditions from us in the country which are generally favorable and very favorable for these species.The purpose of the paper is to highlight the evolution of annual growths in some species of conifers under the conditions of Iasi county.Observations were made on the species Chamaecyparis lawsoniana 'Blue Piramidal'Al.(Murr. Parl), Juniperus scopulorum 'Skyrocket'Sarg., Thuja occidentalis 'Fastigiata'L. During the vegetation period observations were made regarding the determination of the annual growth length and the influence of the complex chemical fertilizers N, P, K (1: 1: 1) on the annual growths.