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西双版纳橡胶林生物量随海拔梯度的变化

贾开心;郑征;张一平   

  1. 中国科学院西双版纳热带植物园昆明分部,昆明 650223
  • 收稿日期:2005-12-15 修回日期:2006-04-12 出版日期:2006-09-10 发布日期:2006-09-10

Changes of rubber plantation aboveground biomass along elevation gradient in Xishuangbanna

JIA Kaixin;ZHENG Zheng;ZHANG Yipin   

  1. Kunming Section of Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming 650223, China

  • Received:2005-12-15 Revised:2006-04-12 Online:2006-09-10 Published:2006-09-10

摘要: 对西双版纳低(550~600 m)、中(750~800 m)、高(950~1050 m) 3个海拔梯度上橡胶林地上及各器官的生物量进行了测定。结果表明,海拔从低到高,地上生物量和干生物量都呈降低趋势,干生物量占地上生物量的70%以上;海拔间的地上生物量和干生物量差异显著(P<0.05)。枝和叶生物量为中海拔最高,低海拔次之,高海拔最低,二者分别占地上生物量20%和5%左右,仅高海拔和低海拔间差异显著(P<0.05)。气温的海拔间差异可能是引起生物量海拔间差异的重要原因之一。3个海拔上各器官生物量大小顺序为:干>枝>叶。橡胶林低海拔模型用于中海拔和高海拔、混合模型用于各海拔的生物量计算会导致不同程度的误差。

关键词: 萨福克羊, 无角陶塞特羊, 生态适应性, 杂交

Abstract: The investigation on the aboveground biomass of rubber plantation in Xishuangbanna at low (550~600 m), medium (750~800 m), and high (950~1 050 m) elevations showed that the aboveground biomass and its dry weight were decreased with increasing elevation, and there was a significant difference at different elevations. The dry weight of the biomass was higher than 70%. The biomass of branch and leaf, which occupied 20% and 5% of the aboveground biomass, respectively, was the highest at medium elevation, and the lowest at high elevation. Temperature was possibly one of main factors affecting the biomass. The biomass of aboveground organs at the three elevations ranked in the order of stem > branch > leaf. Using the regression model of rubber plantation biomass at low elevation to calculate the biomass at medium and high elevations, and the mixed model to calculate the biomass at the three elevations would bring errors to a certain extent.

Key words: Suffolk sheep, Polled Dosert sheep, Ecological adaptability, Hybrid