摘要
从2005年4月23日到6月5日在准噶儿盆地南缘小沙丘对沙丘北坡、平地、沙丘南坡、农田旁、红柳下5个生境条件下,对齿稃草种群数量动态进行了系统研究,编制了生命表,分析了存活数和死亡数、存活率和死亡率。结果表明:影响准噶儿盆地齿稃草种群动态的因素主要有非生物因素-水分条件,水分越充足种子的萌发越好,生存率越高。齿稃草纯优群落盖度的减小速率与齿稃草数量减少速率同步,其他物种对齿稃草的生长有一定的影响,但是对于齿稃草这种荒漠一年生浅根系的早春短命植物影响而言,影响甚微。
The dynamics, sizes and structures of Schismus arabicus populations in the habitats of south slope, north slope, flat field, beside the farm, under the Tam arix sp. were systematically studied the southern brimge of Junger Basin from April 23,2005 to June 5, accordingly their static life tables, survival curves and death curves of the populations were worked out. The result indicated that. the population＇s dynamic properties were mainly influeced by non-biotic factors such as water,which provided good condition for the seeds to sprout. However, other species also had certain influence on the development of Schismus arabicus. In addition, the velocity of coverage＇s decrease is synchronous to that in the decrease of population size.
出处
《石河子大学学报（自然科学版）》
CAS
2010年第2期133-137,共5页
Journal of Shihezi University(Natural Science)
基金
国家重大基础研究前期研究专项(2004CCA02800)
关键词
齿稃草
生命表
准噶尔盆地
种群动态
Schismus arabicus
Junger Basin
life table
population dynamic
