科尔沁沙地三种沙蒿植物的繁殖分配研究  

Reproductive Allocation of Three Sandy Plants from Genus Artemisia in Horqin Sandy Land

作　　者：张慧[1,2] 王铁娟 苏日格嘎[1] ZHANG Hui;WANG Tie-juan;Surigega(College of Life Science and Techonology,Inner Mongolia Normal University,Hohhot 010022,China;Key Laboratory of Biodiversity Conservation and Sustainable Utilization for College and University of Inner Mongolia Autonomous Region,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学生命科学与技术学院,内蒙古呼和浩特010022 [2]内蒙古自治区高等学校生物多样性保护与可持续利用重点实验室,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学版）》2022年第2期186-192,共7页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古自治区自然科学基金资助项目(2019MS03041)。

摘　　要：蒿属沙生半灌木在科尔沁沙地起着重要的防风固沙作用,其中差不嘎蒿(Artemisia halodendron)、乌丹蒿(Artemisia wudanica)为乡土植物,白沙蒿(Artemisia sphaerocephala)为飞播植物。选择生于半固定沙地的三种植物的种群,通过野外取样和室内分析,探讨三种植物繁殖分配的特征,结果表明:(1)白沙蒿的繁殖分配比例为66.06%,差不嘎蒿为33.73%,乌丹蒿为21.67%,三种植物4龄及以上成株的繁殖分配差异性分析表明白沙蒿极显著大于另两种植物(P<0.01);(2)白沙蒿繁殖分配比例在60%以上的个体数占总个体数的75%,乌丹蒿则以低繁殖分配比例的个体多,其中繁殖分配在0~20%的个体占58.33%,差不嘎蒿各繁殖分配比例的个体分布较为均匀;(3)三种植物的繁殖体质量与地上生物量呈线性关系,均随生物量的增加而增加,但乌丹蒿的规律性不强;差不嘎蒿与白沙蒿个体大小与繁殖分配呈正相关,乌丹蒿不显著;(4)在调查区,两种固沙先锋植物白沙蒿和乌丹蒿在2龄开始繁殖,差不嘎蒿在3龄开始繁殖,且随着年龄的增长三种植物的繁殖分配比例上升,4龄后乌丹蒿呈现下降,另两种仍有增长趋势。反映出三种蒿属固沙半灌木在繁殖策略上的差异性。Sandy semi-shrub from genus Artemisia plays a significant role in windbreak and sand fixation in Horqin sandy land,such as two native distributed plants Artemisia halodendron,Artemisia wudanica and one aerial seeding plant Artemisia sphaerocephala. In this study,we took the community of the three plants growing in semi-fixed sandy land to study their reproductive allocation characteristics through field sampling and indoor analysis. The results showed that(1)the reproductive allocation of A. sphaerocephala(66. 06%)was significantly higher than that of A. halodendron(33. 73%)and A. wudanica(21. 67%);the differences in reproductive allocation among adult plants aged 4 years or more of A. sphaerocephala was significantly greater than that of the other two plants(P<0. 01);that(2)there were 75% individuals with reproductive allocation ratio above 60% in A. sphaerocephala;there were more individuals with low reproductive allocation ratio in A.wudanica,among which 0-20% of the individuals accounted for 58. 33 %;however,reproductive allocation ratio of individuals in A. halodendron was relatively uniform distributed;that(3) there was a linear and positive relationship between the diaspore weight and aboveground biomass for the three plants,but the relationship was weak for A. wudanica;the plant size was significantly and positively correlated with reproductive allocation except A. wudanica;that(4) in the surveying area,A. sphaerocephala and A.wudanica,two pioneer plants for sand-fixing,began to reproduce at the age of two years,and A. halodendron at the age of three years;the proportion of reproductive allocation of the three kinds of plants increased with age,except A. wudanica decreased after the age of four years,indicative of the difference of the reproductive strategies for the these sand-fixation semi-shrubs from genus Artemisia.

关 键 词：蒿属 固沙植物 繁殖分配 个体大小 

分 类 号：Q945.5[生物学—植物学]