不同海拔高度下淫羊藿的种群年龄结构

从3个海拔高度(568、643和790m)研究了淫羊藿种群年龄结构,并对各龄级根茎数量、根茎长度、根茎生物量、分株数量、分株生物量进行测定。结果表明:海拔643m淫羊藿根茎龄级最高达10龄,海拔568和790m根茎最高龄级有9龄;3个海拔分株龄级与根茎龄级一致;海拔643m各龄级根茎数量从1龄到10龄呈下降趋势;3个海拔各龄级根茎长度、根茎生物量、分株数量、分株生物量都是2龄占优势;海拔643m各龄级根茎数量、长度、生物量和分株数量、生物量最多。海拔643m的生境最适合淫羊藿克隆生长,可以对其进行适当的采集。

Age structure of Epimedium brevicornum population at different altitudes

The age structures of Epimedium brevicornum population were investigated at three altitudes,i.e.,568 m,643 m and 790 m,with the number,length and biomass of rhizomes as well as the number and biomass of ramets of each age class measured.The results showed that the highest age class of rhizomes was ten years old at altitude 643 m,and nine years old at other altitudes.The ramets at the three altitudes had the same age classes of rhizomes.At altitude 643 m,the number of rhizomes had a decreasing trend from the age class 1 year old to 10 years old.Among the age classes,2 years old was superior in the length and biomass of rhizomes and the number and biomass of ramets,and the number,length and biomass of rhizomes as well as the number and biomass of ramets at altitude 643 m were the highest.The habitat at altitude 643 m was the most supportive for E.brevicornum,and the exploitation could be undertaken at the places near this altitude.