In order to understand the stand structure and growth of phellodendron amurense plantation in limestone mountain, 11-year-old phellodendron amurense plantation with good growth was selected in Da'an Township, Long...In order to understand the stand structure and growth of phellodendron amurense plantation in limestone mountain, 11-year-old phellodendron amurense plantation with good growth was selected in Da'an Township, Longshan County, Hu’nan Province. A temporary sample plot of 3000m2 was set up to investigate factors such as DBH, tree height, branch height and crown width of each tree. The results showed that the average diameter at breast height, tree height, height to diameter ratio, branch height, crown width, crown height ratio and crown width area of 11-year-old phellodendron amurense plantation with density of 1483-2500 plants /hm2 in limestone mountain area were 8.63cm, 8.74m, 105.4, 4.05m, 2.79m, 0.52 and 6.62m2 respectively;The main factors affecting the height growth of phellodendron amurense are soil fertility and soil physical and chemical properties. The DBH structure of stand approaches normal distribution;The height structure of the stand tree presents typical normal distribution;The above range of stand density had no significant effect on stand growth;The 11-year-old phellodendron amurense forest has obvious differentiation and needs thinning and tending. The 11-year-old phellodendron amurense plantation has entered the beginning stage of middle forest.展开更多
文摘In order to understand the stand structure and growth of phellodendron amurense plantation in limestone mountain, 11-year-old phellodendron amurense plantation with good growth was selected in Da'an Township, Longshan County, Hu’nan Province. A temporary sample plot of 3000m2 was set up to investigate factors such as DBH, tree height, branch height and crown width of each tree. The results showed that the average diameter at breast height, tree height, height to diameter ratio, branch height, crown width, crown height ratio and crown width area of 11-year-old phellodendron amurense plantation with density of 1483-2500 plants /hm2 in limestone mountain area were 8.63cm, 8.74m, 105.4, 4.05m, 2.79m, 0.52 and 6.62m2 respectively;The main factors affecting the height growth of phellodendron amurense are soil fertility and soil physical and chemical properties. The DBH structure of stand approaches normal distribution;The height structure of the stand tree presents typical normal distribution;The above range of stand density had no significant effect on stand growth;The 11-year-old phellodendron amurense forest has obvious differentiation and needs thinning and tending. The 11-year-old phellodendron amurense plantation has entered the beginning stage of middle forest.
