摘要
在陕西省宁陕县火地塘教学实验林场设置固定标准地，研究了华山松（ＰｉｎｕｓａｒｍａｎｄｉＦｒａｎｃｈ．）针叶的动态变化。研究结果表明华山松１龄针叶总生物量在全年持续增加，而２、３龄针对则慢慢减少。１龄针叶总生物量在５月下旬到８月初增加最快。各龄针叶的理论死亡率可用于估算林分全年叶量及落叶量。华山松针叶叶长和叶重高度相关。华山松林一年有两个落叶高峰期：５～６月和９～１０月。华山松枝长与叶痕数紧密相关。
Foliage samples were taken from 10 armand pine (Pinus armandi Franch.) trees at 8sampling dates at Huoditang Experimental Forest Farm in the Qinling Mountains. Meanwhile,litterfall in the forest was also collected. The results showed that the greatest amount of litterfalloccurred in late autumn and spring. The total amount of 1-year-old needles increased duringthe growing season, but that of 2-year-old and 3-year-old needles decreased over the sameperiod. The amount of 1-year-old needles increased rapidly from late May to early August.The length of twigs and the number of needle scars were correlated significantly. There was aclose correlation between needle weight and needle length, the correlation equations for needles ofdifferent ages in different months were established.
出处
《西北林学院学报》
CSCD
1995年第4期1-5,共5页
Journal of Northwest Forestry University
基金
林业部重点课题
关键词
华山松
针叶动态
凋落物
Pinus armandi
needle dynamics
litterfall
