为了综合评价冷季型草坪草种的耐荫能力,选取4种冷季型草坪草的5个品种,研究了0%、37%、63%、81%和96%5个梯度的遮阴处理对叶绿素a含量与生物量的影响.结果表明:在中低遮阴强度下,叶绿素a随着遮阴时间的延长呈正相关,在高遮阴强度下,则随着时间的延长呈负相关;单株干重、单株苗数在低遮阴强度下均呈正相关,在高遮阴强度下,各草种均呈负相关,但草种间下降的速率不一致;单株成穗数对遮阴反应最为明显,其中,润草1号在94.6%遮阴处理仍然有少量成穗,艾德王在80.1%时成穗为零,其他品种均有少量成穗.%Comprehensive evaluation on shading tolerance of several cool season turfgrass seedlings (4 cool season grass species,5 varieties)were conducted under 5 shading rates (0%,37%,63%,81% and 96%) through measuring the chlorophyll content and biomass.Results showed that 1)the content of chlorophyll a was positively correlated with shading time under low medium shading stress,and negatively correlated under high shading stress;2)dry weight and seedlings number were positively correlated with shading time under low shad-ing stress,lifting varied under moderate shading stress,and negatively correlated with shading time under high shading stress,but the decline rates were different among species;3 )the spike number of Advent was 0 under 80.1% shading treatment,and the other varieties had a small amount of spike.Runcao No.1 still developed a small amount of spike under 94.6% shading treatment.
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