刺槐无性系生态适应性差异研究  

Studies on the differences in ecological adaptability of Robinia pseudoacacia clones

作　　者：位晓[1] 曹志 毛培利[3] 

机构地区：[1]胜利油田胜大集团农业公司,山东东营257083 [2]临沂市兰山区林业技术推广站,临沂276000 [3]山东农业大学林学院,泰安271018

出　　处：《山东林业科技》2017年第5期31-34,38,共5页Journal of Shandong Forestry Science and Technology

摘　　要：以3个刺槐无性系1年生苗为研究对象,通过比较晴天下光合日变化和生物量分配,研究了无性系的生态适应性。结果表明:L_1和L_(59)净光合速率日变化为双峰形,峰值分别在10:00和16:00;而L_(78)为单峰形,峰值在10:00。净光合速率日均值L_1<L_(59)<L_(78);蒸腾速率日均值L_1和L_(78)与L_(59)差异不显著,叶温日均值低于L_(59);但在气孔导度和水分利用效率日均值上无性系之间显著不差异。3个无性系在叶生物量比、茎生物量比上差异不显著,根生物量比是L_1和L_(59)高于L_(78)。综合比较3个无性系,L_(59)高的光合能力和根系生物量分配使其在生态系统早期演替阶段有着最强的适应能力。The ecological adaptability of three one-year old seedlings of Robinia pseudoacacia clones was studied by comparing their diurnal photosynthetic changes and biomass allocation in sunny days . The diurnal change of net photosynthetic rate （Pn） for L1 and L59 showed a double-peak curve with the peak values occurring separately at 10： 00 and 16：00, whereas for L78 it was a unimodal curve and the peak value was at 10：00. Diurnal average values of the Pn was as follows： L1 〈 L59 〈 L/8. ＇o significant differences were found between L1 （or L78 ） and L5 9 in mean daily value of transpiration rate （E）, but both L1 and L78 was lower than L59 in mean daily value of leaf temperature （Tl）. However, there were no significant differences in mean daily value of stomatal conductance （gs） and water use efficiency （WUE） among the three clones. In biomass allocation, there were no significant differences in leaf mass ratio and stem mass ratio among the three clones. However, in root mass ratio, L1 and L59 were higher than L7 8 . By integrating the three clones’ ecophysiological characteristics, the results indicated that L5 9 had the strongest adaptability in the early successional stage because of its high photosynthetic capacity and root mass allocation.

关 键 词：光合作用 生物量分配 演替 

分 类 号：Q948.112.1[生物学—植物学]