祁连圆柏群落生物量及营养元素积累量

Biomass and Nutrient Element Accumulation of Sabina prezewalskii Foret Community

对祁连山不同类型条件下的祁连圆柏群落生物量和营养元素积累量的测定结果表明：祁连圆柏群落生物量为２３１．２０ｔ／ｈｍ２，其中乔木层占９８．３４％，灌木层占１．６０％，草本层占０．０６％；祁连圆群落年净生长量为４．４１ｔ／ｈｍ２，其中乔木层为３．９６ｔ／ｈｍ２，占８９．８０％，灌木层占７．２５％，草本层占２．９５％；群落营养元素积累量总计为３６３３．８１ｋｇ／ｈｍ２，其中Ｃａ、Ｎ、Ｋ所占比例较大，分别为５４．２７％、１９．５５％和１１．０５％，Ｚｎ所占比例最小，仅为０．０３％。

Biomass and nutrient element accumulation of Sabina przewalskii forest community of different types were measured in the Qilian Mountains. The result showed that the average biomass of S.przewalskii was 231.20t/hm 2, of which arbor layer made up 98.34%,brushwook layer 1.60%,herb layer 0.06%; the total of the nutrient element accumulation was 3633.81kg/hm 2, in which the proportion of Ca, N and K was the biggest,which were 54.27%, 19.55% and 11.05% respectively, that of Zn was the smallest, it was only 0.03%.