伊犁河谷春秋草地围封恢复过程中种间关联性研究

采用样方调查法，通过对方差分析、x2检验及种间关联度OI值的计算，对伊犁河谷春秋草地围封6年、5年、1年和未围封的草地群落中主要种群间的联结性进行了比较。结果表明，围封6年和5年的总体表现无关联,种间关联松散，围封1年和未围封表现轻微负关联。随着围封植被的恢复正关联显著的种对增加，负关联显著的种对明显减少，正负关联率表现为先减小后增大的趋势。优势种分布相对稳定，与其他种群表现中性联结，其他种群易受物种和环境的影响。种间联结测定值在一定程度上反映了物种间的相互关系以及它们与环境因子的关系，在未围封和围封初期种间关系受环境因素影响较大，随着群落生境的改善，生物因素对种间关联影响逐渐增强。

Study on interspecific association of spring-autumn pasture under enclosure and recovering conditions in Yili River valley

The interspecific association in the major population of grazing communities and enclosed communities for 1,5 and 6 years(spring-autumn pasture) in Yili River valley were studied and the results showed that the species in the communities enclosed for 5 and 6 years unassociated,and those enclosed for 1 year and unenclosed slightly associated.Along with the vegetation restoration,the species with positive association remarkably increased and those with negative association remarkably reduced.The positive and ...