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扎龙自然保护区不同生境条件下羊草种群构件的年龄结构

焦德志1,2;丁雪梅1;杨允菲1   

  1. 1东北师范大学草地研究所植被生态科学教育部重点实验室, 长春 130024; 2齐齐哈尔大学生命科学与工程学院,齐齐哈尔 161006
  • 收稿日期:2005-12-31 修回日期:2006-03-21 出版日期:2006-06-10 发布日期:2006-06-10

Age structure of Leymus chinensis population modules in different habitats of Zhalong Nature Reserve

JIAO Dezhi1,2; DING Xuemei1;YANG Yunfei1   

  1. 1Key Laboratory of Vegetation Ecology of Education Ministry, Institute of
    Grassland Science, Northeast Normal University, Changchun 130024, China;
    2College of Life Science and Technology, Qiqihar University, Qiqihar 161006, China

  • Received:2005-12-31 Revised:2006-03-21 Online:2006-06-10 Published:2006-06-10

摘要: 对黑龙江国家级自然保护区扎龙湿地不同生境条件下羊草种群构件的年龄结构进行了研究。结果表明,在7月末羊草种群的腊熟期,3种生境种群分蘖株均由3个龄级组成,林间风沙土生境为1 080株·m-2,沙土生境为1 290株·m-2,草甸土生境为1 011株·m-2,均以1龄和2龄级分蘖株占绝对优势,3龄级分蘖株所占比例甚小,呈增长型年龄结构。根茎均由4个龄级组成,以沙土生境最多,累积长度为8 000 cm·m-2,草甸土生境最少,为6 948 cm·m-2,均呈增长型年龄结构。各生境根茎物质的储量随着龄级的升高而降低。芽均由4个龄级组成,其数量以草甸土生境最大,为2 279 个·m-2,沙土生境次之为2 113个· m-2,林间风沙土生境最少为1 410个·m-2,均呈增长型年龄结构。

关键词: 真水狼蛛, 胚胎发育, 温度, 相对湿度, 光照时间

Abstract: The study on the age structure of Leymus chinensis population modules in three habitats of Zhalong Nature Reserve showed that at the waxen maturity stage of the population (by the end of July), the tillers were composed of three age classes, with the 1st and 2nd age classes the dominant and the 3rd age class the least, and presented in an increasing age structure. There were 1 080 tillers·m-2 in inter-forest sand soil, 1 290 tillers·m-2 in sand soil, and 1 011 tillers·m-2 in meadow soil. The rhizomes were composed of four age classes, with 8 000 cm·m-2 of accumulative length in sand soil and 6 948 cm·m-2 in meadow soil, and presented increasing age structure. The dry matter storage in rhizomes decreased with increasing age. There were four age classes of buds, with the largest number (2 279 buds·m-2) in meadow soil, the second (2 113 buds·m-2) in sand soil, and the least (1 410 buds·m-2) in interforest sand soil. The buds were also of increasing age structure.

Key words: Pirata piraticus, Embryonic development, Temperature, Relative humidity, Photoperiod