Effects Of Site Conditions And Management Practices On Bark Quality Of Wingceltis And Property Of Xuan Paper

Based on the investigation of 57 plots in Jingxian County and by using single factor, two factors ANOVA , Duncan's multiple comparison and comprehensive coordinate evaluation method, the effects of site conditions and management practices on bark quality of wingceltis (Pteroceltis tatarinowii) and property of Xuan paper, and the relationships between bark quality of wingceltis and property of Xuan paper were studied in this paper. The main results are as follows:1. By means of comparison and analysis to the qualities of wingceltis barks which harvested from the soil sites originated from three kinds of different parent rock--limestone, slate and gneiss, the results indicate that parent rocks have markedly significant effects on basic densities, fiber lengths and cellulose contents of wingceltis bark, and have significant effects on lignin contents, while there are no significant effects on fiber widths, ratios of length to width, ash contents, benzene-alcohol soluble contents and pentosan contents.2. By means of comparison and analysis to the qualities of 1 to 5-year-old wingceltis barks, the results indicate that bark ages have markedly significant effects on basic densities, fiber widths, ratios of length to width, ash contents, cellulose contents and lignin contents of wingceltis bark, and have significant effects on fiber lengths, benzene-alcohol soluble contents and pentosan contents.3. The differences of bark qualities of wingceltis which planted in the different slopes—the middle slope, below slope and foot of a mountain, were studied. The results show that there are markedly significant differences in the basic densities and ratios of length to width of wingceltis barks from the different slopes, and there are significant differences in fiber lengths and fiber widths, while there are no differences in chemical components among the slopes.4. Spout numbers (5, 10 and 15 spouts) in each stump have markedly significant effect on basic densities of 3-year-old wingceltis barks, and have significant effects on fiber lengths and ash contents, while there are no significant effects on the other paper-making properties. Compared with the three cultivation measures mentioned above, spout numbers in each stump have less influence on the paper-making properties of wingceltis barks. These results show that more suitable numbers of spouts could be maintained so that high bark production can be obtained.5. The effects of parent rocks on the qualities of wingceltis barks are different in the different bark ages. Based on the comprehensive coordinate evaluation, in 1 and 2-year-old, the qualities of wingceltis barks from different parent rock sites is in order of gneiss﹥limestone﹥slate (from fine to inferior); but in 3 to 5-year-old, the order is limestone﹥gneiss﹥slate.6. Although the effects of bark ages on the qualities of wingceltis barks are slightly...