新造红竹林地下结构年际变化规律初步研究

以优良经济竹种红竹为对象,通过对新造竹林年际地下鞭系结构因子的调查,结果表明:鞭长和鞭径是反映新造竹林成林速度和质量的主要因子,鞭长与造林后年度呈线性增长趋势,鞭径和单位面积侧芽数随造林年份增加而增大,造林后第4年鞭长、鞭径、侧芽数分别为579.7 cm/m2、1.75 cm、79个/m2,地下鞭系结构状况达到成林水平.幼林和成林鞭系集中分布于上层20 cm土壤空间,应加强该区段土壤水肥管理.母竹径级对鞭长、鞭径生长影响显著,差异性随造林后年度增加而增大,建议造林母竹胸径以2.5～ 3.0 cm为宜.

Preliminary Study on Underground Structure Change Rule of Newly Planting Phyllostachys iridenscens Stand

Investigations on rhizome structure factors of newly planting Phyllostachys iridenscens stands showed that length and diameter of rhizome reflected speed and quality of the stand. Rhizome length was of linear increase after 2 years of plantation, rhizome diameter and unit area lateral buds increased along years. Rhizome length and diameter, lateral bud were 579.7cm/m^2 1.75cm, 79 buds/m^2 by the end fourth year, and the underground structure then became closed forest. The rhizome of young and adult stand distributed in the upper 20 cm of soil. Mother bamboo D.B.H had significant effect on the future rhizome length and diameter. Mother bamboo with 2.5-3cm D.B.H was recommended for plantation.