The invasive plant Alternanthera philoxeroides can wreak havoc on local ecosystems.In order to evalu-ate the growth status of Alternanthera philoxeroides in different habitats,the physiology and growth status of Al-ternanthera philoxeroides were measured in 4 typical sample sites of China West Normal University.The results showed that:① the main environmental stress of the growth of the Alternanthera philoxeroides in the downstairs A of the apartment was insufficient light intensity,decreased photosynthetic rate,and slow accumulation of bio-mass.The plant obtained more light by allocating more biomass to stem development,and the growth strategy of the plant was S strategy.② In open space C,the main environmental stresses were excessive light,insufficient water and increased photosynthetic rate of plants.But the accumulation of biomass was slow.The growth strategy was S strategy by reducing the leaf area to adapt to the environmental stress.③ The environmental stress of Al-ternanthera philoxeroides was flooding stress in the area C of farmland flooding.The photosynthesis of plants was seriously inhibited.The biomass accumulation was slow,and the growth strategy of plants was S strategy.
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