沙坡头人工固沙区油蒿繁殖分配的研究

摘要/Abstract

摘要：

对沙坡头人工固沙区油蒿 (Artemisia ordosica) 开花结实期的繁殖分配和生殖枝的生长特点进行了研究,结果表明:2006年8—10月,油蒿生殖枝重、头状花序重都显著增加(P<0.05),但繁殖分配均保持在26%左右;油蒿的繁殖分配与个体大小有一定的关系,地径在0.5 cm以上的油蒿个体才能够开始繁殖,繁殖分配大致呈现出在一定范围内随个体增大而上升,然后又随个体继续增大而下降的趋势。对不同建植年代(1956年、1964年、1981年、1987年)样地中油蒿繁殖结构特征和繁殖分配比较发现,1981年样地上油蒿的生殖枝重、单位生殖枝上的头状花序数、繁殖分配都低于其他3个年代,且其他3个年代的样地间无显著差异(P>0.05)。这表明,人工固沙区油蒿种群的繁殖不仅受固沙时间的影响,而且受其他因素的制约。

关键词: 油蒿, 有性繁殖, 繁殖分配

Abstract: A field experiment on the reproductive allocation of sub-shrub Artemisia ordosica was carried out on the re-vegetated areas in Shapotou of Tengger Desert. The results reflected that the weight of flowering shoots and flowers were growing fast, while the reproductive allocation was always approximately at 26% from Aug. to Oct. 2006. It was also found that individuals of Artemisia ordosica began to flower only after it reached a basal diameter of 0.5 cm. The reproductive allocation increased monotonically within a range of basal area sizes only, and a curvilinear, not linear, model could best delineate the relationship between reproductive allocation and plant size (indicated by basal diameter). The reproductive allocations and reproductive units of Artemisia ordosica were different in different re-vegetated areas which established in various time. The reproductive allocation, weight of flowering shoots and quantity of flowers in site re-vegetated in 1981 were significantly lower than the other three sites (1956, 1964, 1987), but the quantity of flowering shoots and size of flowers were almost same in the four sites. These suggested that the reproductive allocation and growth of reproductive units were controlled not only by fixation duration, but also by any other factors.

Key words: Artemisia ordosica, sexual reproduction, reproductive allocation

中图分类号:

Q945.5

冯丽;张景光;张志山;郑敬刚;宋维民;. 沙坡头人工固沙区油蒿繁殖分配的研究[J]. 中国沙漠, 2008, 28(3): 473-477.

FENG Li;ZHANG Jing-guang;ZHANG Zhi-shan;ZHENG Jing-gang;SONG Wei-min;. Reproductive Allocation of Artemisia ordosica in Replanted Area for Sand Fixation in Shapotou Region[J]. JOURNAL OF DESERT RESEARCH, 2008, 28(3): 473-477.

参考文献

[1]苏智先,张素兰,钟章成.植物生殖生态学研究进展[J].生态学杂志,1998,17(1):39-46.
[2]张景光,张志山,王新平,等.沙坡头人工固沙区一年生植物小画眉草繁殖分配研究[J].中国沙漠,2005,25(2):202-206.
[3]Westley L C.The effect of inflorescence bud removal on tuber production in Helianthus tuberosus L.(Asteraceae)[J].Ecology,1993,74:2136-2144.
[4]张大勇.理论生态学研究[M].北京:中国高等教育出版社,2000:10-45.
[5]张景光,王新平,李新荣,等.荒漠植物生活史对策研究进展与展望[J].中国沙漠,2005,25(3):306-313.
[6]李金花,李镇清,刘振国.不同刈牧强度对冷蒿生长与资源分配的影响[J].应用生态学报,2004,15(3):408-412.
[7]苏智先,钟章成.四种大头茶种群生态学研究Ⅱ.种群生物量生殖配置格局研究[J].生态学报,1998,18(4):379-385.
[8]操国兴,钟章成,谢德体,等.不同群落中川鄂连蕊茶的生殖分配与个体大小之间关系的探讨[J].植物生态学报,2005,29(3):361-366.
[9]徐庆,刘世荣,臧润国,等.中国特有植物四合木种群的生殖生态特征——种群生殖值及生殖分配研究[J].林业科学,2001,37(2):36-41.
[10]Li Fengrui,Zhang Aisheng,Duan Shunshan,et al.Patterns of reproductive allocation in Artemisia halodendron inhabiting two contrasting habitats[J].Acta Oecologica,2005,28:57-64.
[11]李新荣,石庆辉,张景光,等.沙坡头地区人工植被演变过程中植物多样性变化的研究[J].中国沙漠,1998,18(增刊):23-29.
[12]李新荣,马风云,龙立群,等.沙坡头地区固沙植被土壤水分动态研究[J].中国沙漠,2001,21(3):217-221.
[13]陈应武,张志山,郑敬刚,等.沙漠人工植被地上部分生长动态[J].西北植物学报,2006,26(9):1819-1826.
[14]郑海雷,黄子琛,董学军.毛乌素沙地油蒿和牛心朴子生理生态学研究[J].植物生态学与地植物学学报,1992,16(3):197-207.
[15]杨洪晓,张金屯,吴波,等.油蒿对半干旱区沙地生境的适应及其生态作用[J].北京师范大学学报:自然科学版,2004,40(5):684-690.
[16]Obeso J R.The costs of reproduction in plants[ J ].New Phytologist,2002,155:321-348.
[17]操国兴,谢德体,钟章成,等.植物种群的生殖分配[J].四川林业科技,2003,24(6):25-29.
[18]Weiner J.The influence of competition on plant reproduction[C]∥Doust L L(ed).Plant Reproductive Ecology:Patterns and Strategies.Oxford:Oxford University Press,1988:228-245.