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在湖南省龙山县红岩溪镇白果村石灰岩发育的石灰土及页岩发育的山地黄壤上开展细叶桢楠天然林幼苗(苗龄4a、苗高80~120 cm)移植造林试验。结果表明:细叶桢楠在山地黄壤上生长比石灰土上好,14 a细叶桢楠胸径年生长量0.56 cm、树高年生长量0.36 m、冠幅3.96 m~2。14 a细叶桢楠胸径年平均生长量持续上升,连年生长量7 a前持续上升,7~14 a波动明显;树高年平均生长量6 a前明显上升,6 a后缓慢下降,连年生长量6 a前波动上升,6 a后快速波动下降,年平均生长量与连年生长量相交于7 a;材积年平均生长量持续上升,连年生长量8 a前缓慢上升,8 a后快速波动上升,平均生长量与连年生长量差距逐年扩大;细叶桢楠胸高形数稳定在0.66~0.51之间。受硕蝽危害,58.4%的植株抽生多主梢。石灰土中84.0%的细叶桢楠根系分布在距地表20 cm土层范围内,山地黄壤中87.7%的细叶桢楠根系分布在距地表30 cm土层范围内。
Phyllostachys nobile plantation seedlings (seedling age 4a, height 80 ~ 120 cm) were planted on the yellow soil of developed limestone and shale with limestone in Baiguo Village, Hongyanxi Town, Longshan County, Hunan Province. The results showed that P. euchinensis grew better on yellow soil than on lime soil. The annual growth of DBH at 14 days was 0.56 cm, the height of tree height was 0.36 m, and the crown width was 3.96 m ~ 2.14 a. The amount of annual growth increased steadily 7 days before, and fluctuated obviously from 7 to 14 years. The average annual growth of tree height increased significantly 6 a months ago and then decreased slowly after 6 years. The annual average growth rate and annual growth rate intersect at 7 a; the average annual growth volume continued to rise, the annual growth rate increased slowly 8 a before, after 8 a rapid fluctuations rise, the average growth rate and annual growth gap year after year Expansion; fine Ye Zhennan chest high number stable between 0.66 ~ 0.51. Succulents by the end, 58.4% of plant shoots more shoots. 84.0% of Phyllostachys heterocycla cv. Phyllostachys pubescens roots distributed in the soil layer within 20 cm from the surface of the earth, and 87.7% of the yellow soil in the mountainous area were distributed within 30 cm of the soil surface.