西南地区野生黄花蒿群落种间联结性分析

Interspecific association of companion species in Artemisia annua community in southwest of China

目的:调查西南地区野生黄花蒿群落主要物种种间联结性,为黄花蒿种质资源保护和野生抚育等提供参考。方法:运用方差分析、种间联结显著性检验等指标,对西南地区9省、市48个地区黄花蒿群落主要物种种间关系进行分析。结果:黄花蒿群落主要植物的总体关联性的方差比率为2.05,大于l,表现为显著正关联性。在10个主要物种的45个种对中,仅有4个显著负相关。χ2检验和PC,OI,DI,AC值等表明种对1-8(黄花蒿-白苞蒿)、1-9(黄花蒿-狗尾草)、1-10(黄花蒿-三叶鬼针草)有较高关联性,对非限制性资源的利用有共同的反应或偏向。结论:西南地区野生黄花蒿群落处于相对稳定状态,抗干扰能力较强,群落结构发育基本完全,种间关系稳定。

The interspecific association of companion species in Artemisia annua community in 48 region of southwest China was analyzed by variance analysis, X2-test and association indices. The total related variance ratio among species in A. annua commu- nity was 2.05. Among 45 species pairs of 10 main species in the community, only 4 pairs showed significant negative correlations. X2 test, PC, OI, DI and AC values indicated pairs 1-8 （A. annua- A. lactiflora）, 1-9 （A. annua- Setaria viridis） and 1-10 （A. annua- Bidens pilosa） showed a high correlations, and common utilization to non-restrictive resources. The results indicated that there was a significant positive correlation among species, and the community was at a stable stage, showed strong ability to human interference.