【摘要】 在所测78种植物中,光合(Ph)、蒸腾速率(Tr)和水分利用效率(WUE)的平均值,分别以反枝苋、藜和西伯利亚滨藜最高。在不同分类系统中,Ph、Tr和WUE3个指标,C4植物大于C3植物;双子叶植物通常大于单子叶植物;藜科植物高于其他科植物;1～2年生草本高于其他生活型植物;撂荒地植物一般高于其他植被类型的植物。方差分析表明,光合速率的差异显著性水平在各分类系统中均高于蒸腾速率和水分利用效率。更多还原

【Abstract】 The average values of photosynthesis (Ph), transpiration rate (Tr) and water use efficiency (WUE) of Amaranthus retroflexus, Chenopodium album and Atriplex sibirica were the highest in 78 species tested In different classification system, as far as Ph, Tr and WUE values are concerned, C 4 plant was higher than C 3 plant; dicotyledons were usually higher than monocotyledons; chenopodiaceae plant gave higher values than other plant family; annual and biennial forages were higher than others; plants in abandoned land gave better performance than other vegetation form The variance analyses indicated that difference significance levels of Ph are higher than those of Tr and WUE in every classification system更多还原