The Research on Bamboo Bleeding and Its Control Techniques

Bamboo bleeding often occurred during the growth season after cutting andconcentrated in 24 hours after cutting,which accounted for 94.2% of the total bleedingamount.The bleeding amount changes with the change of season,beginning to increase fromlate March,reaching the peak in May, and decreasing then until the late September.No significant correlations were found between bleeding amount and bamboo DBH,but bleedingamount from young or middle-age bamboo outclassed that from old-age bamboo during thesame growth season within biennial cycle period.Site conditions,especially soil water content and precipitation,affected the bleeding amount obviously.The content of organic andmineral nutrients in bleeding was high,and changed with the change of season arid site conditions.Burning had more evident effect on bleeding than that of several other coating techniques.