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对建立在安徽省全椒县瓦山林场的10年生马尾松种源实生种子园的主要性状分析表明,参试的17个种源(10年生)其平均高、胸径和单株材积与潜山对照种源相比增益分别为7.6%、11.95%和35.45%;湘赣低山丘陵区4个种源与潜山对照种源相比,高、径、材积增益分别为10.52%、16.15%和50.34%;贵州高原区(含武陵山区)3个种源与潜山对照种源相比,高、径、材积增益分别为10.8%、13.3%和43.17%。结实相关性状如冠幅、冠层厚度,中亚热带种源均比北带种源和对照种源为大,而北亚热带(含对照)种源的结实初期结果率比中带高。通过方差分析,其高、径、材积、冠幅、冠层厚度和球果数在种源间均呈显著或极显著水平,差异显著或极显著。相关分析表明,主要性状生长量随纬度降低而升高,球果数随纬度升高而升高,呈弱度到中度相关,为连续渐变。
The analysis of the main characters of 10-year-old Masson seed provenance seed orchard in Wushan Forest Farm, Quanjiao County, Anhui Province showed that the average height, DBH and single plant volume of 17 provenances (10 years old) Compared with the provenances, the gains of the provenances were 7.6%, 11.95% and 35.45%, respectively. Compared with the provenances of buried hills, the four provenances in Hunan-Jiangxi hilly region were 10.52%, 16.15% and 50.34%. Compared with the provenances of buried hills, the three provenances in Guizhou Plateau (including Wuling Mountain) had 10.8%, 13.3% and 43.17% of the total biomass, respectively. Strong traits such as crown width and canopy thickness were higher in middle-subtropical provenances than those in northern and northern provenances, while those in northern subtropics (control) provenances were higher than those in middle provenances. By means of analysis of variance, the height, diameter, volume, crown width, canopy thickness and number of cones were significant or highly significant among provenances, with significant or extremely significant differences. Correlation analysis showed that the growth of major traits increased with the decrease of latitude, while the number of cones increased with the increase of latitude, showing a weak to moderate correlation and a continuous gradient.