摘要
对雷竹覆盖保护地栽培林地经营状况、竹林结构和土壤微生物调查表明：覆盖保护地栽培技术的干扰，导致竹林不能及时更新，立竹生长严重衰退，土壤微生物状况失调，影响了雷竹地下部分的生长环境；受母竹留养障碍和立竹生长衰退的影响，立竹结构严重失调，林分生长势显著下降，单位面积林分的叶面积指数较一般丰产竹林低１０％左右，严重衰退林分要低５０％以上，开花现象严重；地下结构状况恶化，总鞭长和幼壮鞭的比例明显下降，鞭芽绝对数量显著降低，仅为丰产竹林单位面积芽数的５３％．这说明雷竹覆盖保护地竹林的持续生产力已明显降低．
An investigation was conducted
concerning management, composition and soil microorganism of Lei bamboo plantations
in protected plots.Results show that cultivation techniques brought about such sideeffects
as inability of timely reforestation, serious degradation of bamboo growth, and loss of
balance in soil microorganism, which not only affected the growing environment of
bamboo rhizomes, but caused a serous loss of balance in bamboo composition and an
obvious reduce in growing potential. The index of leaf area per unit area was lower than that
of average highyield bamboo forests by over 10%. It was lower by 50% or so in seriously
degraded plots, where a high flowering rate was demonstrated. An obvious decrease in
sustainable productivity of Lei bamboo protected plots was indicated by all of the
following: deterioration of underground composition, obvious decrease in ratio of total
rhizome length to that of young and strong rhizomes, decline in absolute number of
rhizome buds, which accounted for only 53% of those in highyield plantations.
出处
《中南林学院学报》
CSCD
1999年第2期52-54,共3页
Journal of Central South Forestry University
基金
加拿大国际发展研究中心课题
国际林业研究中心资助课题
关键词
雷竹
笋用林
栽培技术
竹林结构
Lei bamboo(Phyllostachys praecox f. preveynalis), cultivation in protected plantations,
degradation of plots, composition of bamboo
