【作者】 王辉；

【导师】 张国盛；

【作者基本信息】 内蒙古农业大学 ， 林业， 2015， 硕士

【摘要】 本文以内蒙古土左旗万家沟林场国家油松良种基地无性系为研究对象,无性系均为25年树龄,对赤峰宁城种源无性系个体的高度、胸径、冠幅、枝下高等形态指标,以及赤峰宁城、河北围场、河北平泉、山西沁源种源区的油松球果的长度与宽度进行了测定与分析,结果表明：(1)赤峰宁城种源无性系的株高、胸径、冠幅分别达到4.15m、9.44cm、3.89m变异系数分别为9.9%、12.5%、9.8%。(2)种子园内无性系球果长度和宽度平均值分别为55.85mm和37.57mm,变异系数分别为9.3%和11.5%,球果的长度与宽度的频率分布符合标准正态分布；综合聚类表明N161、N14两个无性系的球果长度和宽度都比较大。(3)不同种源区间的变异系数均在15%以下,种源间的球果大小差异呈现出随着种源间距离增大而增加的趋势。更多还原

【Abstract】 This paper, taking clones in National Fine Variety Cultivation Base of Pinus Tabulaeformis Carr. in Wanjiagou Village of Tuzuo Banner in Inner Mongolia as is research object,clone of the age of 40, measures and analyzes the height, DBH, crown diameter, height under branch and other morphological indexes of individual clone in the provenance in Ningcheng County Chinfeng City, and the lengths and widths of Pinus Tabulaeformis’s cones in the provenances of Ningcheng County of Chifeng City, Weichang, Pingquan of Hebei Province and Qinyuan County of Shanxi Province, and the study result show:(1) In the provenance of Ningcheng County of Chifeng City, the plant height, DBH and crown diameter are 4.15m,9.44cm and 3.89m respectively; and the variation coefficients are 9.9%、12.5%% 9.8% respectively. Generally speaking, the heights, DBHs.(2) The average length and width of cones in the provenances are 55.85mm and 37.57mm with the variation coefficients of 9.3% and 11.5% respectively. The frequency distributions of cones’ lengths and widths are in consistent with standard normal distribution. Generally speaking, the cone length and width of clones N161 and N14 are quite satisfactory.(3) The variation coefficients are relatively low (lower than 15%), and the size differences of different provenances increase with the increase of the distance between provenance.更多还原