龙山县八面山华榛人工林造林成效分析

于2004年在龙山县八面山海拔1 200 m地段用1年生华榛实生苗造林,2013年调查造林成效。结果表明:11年生华榛人工林植株保存率84.4%;平均树高6.68 m,树高生长量0.61 m/年,变异系数11.8%~20.6%;平均胸径7.18 cm,胸径生长量0.65 cm/年,变异系数11.4%~32.1%;冠幅面积8.16 m2/株,变异系数68.1%;11年进入初果期,结实率8.1%。分析认为,华榛造林易成林,适宜八面山规模化栽培。光照是影响华榛生长发育的主要因子。

Analysis of plantation of Corylus chinensis at Bamian Mountain in Longshan County

A plantation of Corylus chinensis was established in 2004 at altitude of 1 200 m at Bamian Mountain with 1-year- old seedlings. And the afforestation effect was investigated in 2013. The results showed that the survival rate of Corylus chinensis plantation with 11 years old was 84. 4%. The average height was 6. 68 m,and the average annual increment of height was equivalent to 0. 61 m / a with the variant coefficient range from 11. 8% to 20. 6%. The average DBH was 7. 18 cm,and the annual average DBH growth was equivalent to 0. 65 cm / a with the variant coefficient range from 11. 4% to 32. 1%. The tree crown was 8. 16 m2per individual with the variant coefficient 68. 1%. In addition,there was 8. 1% of individuals among the plantation started to fruit at the age of 11. In a word,Corylus chinensis was apt to afforest and suitable for large scale plantation at Bamian Mountain. And the sunlight intensity was one of the main factors affecting development of Corylus chinensis.