The Comparison Of Morphological Characteristics Between Pinus Tabulaeformis Carr. Seed Orchard Clones In Inner Mongolia Wanjiagou

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.