
Joint analysis of growth and wood property of 38-year-old Pinus massoniana from 55 provenances
HU Xingfeng, WU Fan, SUN Xiaobo, CHEN Houping, YIN Anzheng, JI Kongshu
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (3) : 203-212.
Joint analysis of growth and wood property of 38-year-old Pinus massoniana from 55 provenances
【Objective】The growth provenance and wood property variation of mature masson pine (Pinus massoniana) are studied, revealing the variation rules for different traits at the level of geographical provenance, and screening suitable provenances for Lu’an City in Anhui Province and similar geographical areas.【Method】We selected the state-owned forest tree seed field in Yu’an District, Lu’an City, Anhui Province as the experimental site. 55 provenances were selected for 38-year-old (mature forest) P. massoniana as the test material. The tree height, diameter at breast height(DBH) volume, length and width of tracheid, basic density and microfibril angle are combined to analyze the growth and material properties.【Result】It was found that the diameter at breast height, tree height, volume, tracheid length, tracheid width, microfibril angle and basic density all showed highly significant differences at the provenance level (P < 0.01). The variation range of the phenotypic coefficients of variation and the genetic variation coefficients of each trait are 3.02%-58.61% and 5.56%-28.16%, respectively. The provenance heritability of the DBH, tree height, volume, tracheid length, tracheid width, basic density and microfibril angle are 0.665 7, 0.558 9, 0.616 9, 0.996 3, 0.965 6, 0.739 3 and 0.823 3, respectively. Growth traits are significantly negatively correlated with latitude, and are not significantly different from longitude. Wood properties at different latitude and longitude are both insignificantly different, but show local variation. In the correlation study, it was found that the correlation between growth traits is higher than that between growth and wood properties. The microfibril angle from the medulla core to the bark decreases with increase in age. The basic wood density, tracheid length and width from the pith to the bark increases with the gradual increase in age class, and the range of change decreases with the increase in age class. Through the comprehensive index, five provenances were selected with excellent comprehensive traits. The average genetic gains of DBH, tree height, volume, tracheid length and width, basic density and microfibril angle were 3.69%, 5.72%, 15.12%, 7.05%,-1.12%, 0.17% and -6.46%.【Conclusion】There is abundant genetic variation among the provenances of P. massoniana in mature forests, and growth characteristics show a variation law that gradually decreases from south to north, with wood properties not being related to latitude and longitude. The joint selection of pulp material growth and material properties provides a reliable basis for the selection of fine varieties of pulp material in P. massoniana.
masson pine (Pinus massoniana) / provenance / basic density / tracheid / microfibril angle / wood property
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