摘要
通过样地调查,对黄土高原丘陵沟壑区阳坡、半阳坡、阴坡和半阴坡4个生境条件下种植30年后的柠条人工种群动态进行系统研究,分析了种群的年龄结构,编制了标准生命表及不同坡向静态生命表,绘制了存活曲线。结果表明,黄土高原丘陵沟壑区不同生境条件下的柠条人工种群年龄结构呈进展型,幼龄级个体数量多,中老龄级个体数量少;不同坡向由于环境异质性,柠条种群密度表现不同,其中以半阳坡种群密度最大,存活曲线均接近于DeeveyⅡ型;影响柠条群落恢复和种群生长的环境因素主要是水分因子和光照因子。黄土高原丘陵沟壑区,种植30年后的柠条种群生长状况良好,并具有一定的扩展潜力,说明只要对现存的人工林实行严格的保护和科学的抚育,就能够实现柠条种群自然更新和生长的目标。
Through plot investigation,the dynamics of artificial Caragana korshinskii population after 30 years planted for reforestation on the sunny slopes,semi-sunny slopes,semi-shady slopes and shady slopes of hilly region in Loess Plateau were studied,and the age structure,life table and survival curve of the population were also analyzed in this paper.The results showed that artificial C.korshinskii population in the region belonged to progressive type,with more young and less old individuals.Among the four habits,semi-sunny slope had the highest population density.The survival curve of C.korshinskii population was approached to DeeveyⅡtype.Water and light were the main environmental factors affecting the recovery and development of C.korshinskii community.The C.korshinskii in hilly region of Loess Plateau has grown well for thirty years and this population has certain expanding potentiality,which suggested that as long as the existing artificial forest were protected strictly and managed scientifically,the goals of natural regeneration and growth can be achieved.
出处
《西北植物学报》
CAS
CSCD
北大核心
2010年第8期1681-1688,共8页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家十一五科技支撑课题(2006BAD09B03)
中国科学院西部行动计划项目(KZCX2-XB2-05)林草植被恢复与生态稳定性研究与示范
关键词
柠条种群
年龄结构
生命表
存活曲线
Caragana korshinskii population
age structure
life table
survival curve
