以西葫芦品种翡翠2号、特选丰抗早、美胡2号、特早美玉、百盛2号为试材，研究了低温15 ℃/8 ℃(昼/夜)、弱光8000 Lx 光照强度处理对西葫芦幼苗的光合响应的影响。结果表明，低温弱光处理下生长的幼苗，与日光温室内正常生长的幼苗相比较，5个品种的西葫芦幼苗净光合速率、气孔导度、叶绿素含量均有不同程度下降，胞间CO₂浓度有所升高。供试西葫芦品种特选丰抗早综合指数表现良好，可作为较适合酒泉市设施栽培的品种推广。

Using Jade 2， Texuanfengkangzao， Meihu 2， Tezaomeiyu， Baisheng 2 as the test material， to study the 15 ℃/8 ℃ (day/night) low temperature， 8 000 Lx light intensity on photosynthetic response to light the pumpkin seedlings in the sunlight greenhouse. The result shows that the plants of normal growth compared， the net photosynthetic rate， stomatal conductance， chlorophyll content of five varieties of squash seedling has different rate drop， the intercellular CO₂ concentration increases under the low temperature of weak light. The Texuanfengkangzao of five squash varieties is suitable for facility culture squash variety in Jiuqauan city.

S642.6；S184