论文部分内容阅读
樟子松(Pinus sylvestris Var.mongolica),天然分布的地理范围较窄,由于它耐干旱、瘠薄;适应性强,因而人工栽植的范围较广。早期引种造林的林分,已达结实盛期。为配合樟子松引种,我们开展了樟子松种源试验。目的是通过试验,确定某地的樟子松最佳种源,找出种源间变异规律及影响生长的主要因子,为合理划定种源调拨区提供依据。本文仅仅就苗期试验结果作初步分析。一、试验材料 1.种子来源:供试种子分别来自东北及内蒙七个产地。其中原产地种源3个,人工林种源4个。它们分别代表着温暖干旱、温暖湿润、寒冷干旱和寒冷湿润几个生态环境。具体
Pinus sylvestris var. Mongolica has a narrow geographical range of natural distribution and is widely planted because of its resistance to drought and infertility. Early introduction of afforestation, has reached a flourishing period. In order to cooperate with the introduction of Pinus sylvestris var. Mongolica, we carried out the provenance experiment of Pinus sylvestris var. Mongolica. The purpose is to determine the best provenance of Pinus sylvestris in some area through experiments and to find out the rules of variation among the provenances and the main factors that affect the growth, so as to provide the basis for the rational delineation of provenance allocation areas. This article only preliminary analysis of seedling test results. First, the test material 1 seed source: The test seed from the northeast and Inner Mongolia seven origin. Among them, there are 3 provenances of origin and 4 provenances of plantations. They represent the warm arid, warm and humid, cold and dry and cold humid several ecological environment. specific