Investigation of Crystalline Intensity of the Wood of Poplar Clones Grown in Jiangsu Province, China

摘要

Observed trends from limited sampling are reported in this paper. Using x-ray diffractobrams, differences in wood fiber crystalline intensity (CrI%) among four southern-type poplar clones (I-69155,I-63151,I-72/58, and 1-2 14) and across four planting spacings (4 m by 4 m, 5 m by 5 m, 6 m by 6 m, and 7 m by 7 m) were examined. The analyses showed poplar clones 1-6315 1 and 1-2 14 have the highest CrIYo, followed by 1-69/55 and 1-72/58. Crystalline intensity of wood gradually increased across annual rings; hence CrI% of sapwood was a little higher than that of heartwood. Crystalline intensity of late wood of three of the poplar clones was higher than that of early wood (there was no difference in 1-72/58); and as stand density increased, CrI% of wood also increased. A fully replicated study is needed to firmly establish these trends.