草本植物繁殖分配与海拔高度的相关分析

目的通过检测山西境内霍山不同海拔高度草本植物的繁殖分配模式,为探讨繁殖分配与海拔的关系提供直接证据。方法利用样方调查法和烘干重量法检测了霍山不同海拔高度,即456,900,1 200,1 600,2 000 m共计26种草本植物的繁殖分配系数。结果随着海拔高度的升高,植物的个体大小与之呈负相关;植物个体越大,对繁殖的绝对投入越高,但繁殖分配越低,小个体的繁殖分配则相对较高;海拔高度与植物繁殖分配呈正相关。结论草本植物的繁殖分配受外界环境的影响,同时在一定程度上还受植物本身可塑性和遗传性的影响。

Analysis of correlativity between reproductive allocation and altitude in plants

Aim To survey and detect the patterns of reproductive allocation of plants in different altitudes on Huoshan Mountains in Shanxi,providing direct evidences for probing the relationship between reproductive allocation and altitude.Methods The plots method and drying weighting method were used to detect coefficients of reproductive allocation of 26 herbaceous plants in altitudes of 456 m,900 m,1 200 m,1 600 m and 2 000 m in Huoshan Mountain.Results The results showed that 1) with altitude ascending,individual size is negatively correlative with reproductive allocation coefficient;2)the bigger the individual size is the higher the,absolute input into reproduction,and relatively reproductive allocation is lower,consequently reproductive allocation of small individuals is relatively higher;and 3)altitude is positively correlative with reproductive allocation.Conclusion Reproductive allocation of herbaceous plants is not only influenced by outer environments,but also by plasticity and heredity plants themselves to some extent.