Adaptability and Shooting Characteristics of Dendrocalamus brandisii Introduced in Qinzhou City,Guangxi
Taking 3-year-old Dendrocalamus brandisii forest in Qinzhou City,Guangxi,as the research object,this study analyzes the effects of different slope positions(downhill,mid slope,uphill)on growth and shooting characteristics of D.brandisii.The results show that the average culm number per clump in the 3-year-old of D.brandisii is 8.72,and there is a significant difference in culm number per clump among different slope positions(P<0.05),while the culm number per clump on the downhill slope is significantly higher than that on the uphill slope,and no significant difference exists between the downhill slope and the mid slope,or between the mid slope and the uphill slope.The average diameter at breast height(DBH)of the bamboo forest is 5.47 cm,and the bamboo DBHs are significantly different(P<0.01)at different slope positions,with no significant difference between downhill and mid slope,but both are significantly higher than the uphill.The effects of different slope positions on the number of shoots,shooting rate,mature bamboo number,mature bamboo rate,number of degraded shoots,and degradation rate of shoots are not significant(P>0.05).The analysis of the coefficient of variation(COV)of the average bamboo numbers per clump and the DBH of standing bamboo reveals that the variation of the average bamboo numbers per clump of D.brandisii is greatly influenced by its own genetic characteristics,while different site conditions have greater impacts on DBH variations.Moreover,the average number per clump(52.15%)has higher COV than DBH(27.02%).
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