合肥地区春季大棚光温环境与番茄耐低温弱光指标的筛选

摘要：为了解合肥地区春季大棚内的光温环境，筛选番茄耐低温弱光的指标，为选择适于本地大棚栽培的番茄品种提供依据。通过对2008年3～4月份大棚内外温度、光照的观测和大棚内不同番茄品种的栽培试验，研究了大棚内外的光温环境，低温弱光对13个不同番茄品种苗期的叶片叶绿素含量、净光合速率大小、MDA含量和SOD活性的影响。结果表明，春季大棚内温度在20℃左右、比棚外平均高5℃左右，大棚内光强平均为20kLx。多云或者阴雨天，大棚内出现低温弱光环境。不同番茄品种叶绿素含量不同，美洲豹、天福168叶绿素含量高，天福501净光合速率大，与其低温弱光的适应性一致。低温弱光处理对不同番茄品种叶片MDA的含量和SOD活性的影响不同。天福501、天福168番茄MDA显著低于对照、SOD活性则显著高于对照。文章对低温弱光环境与番茄耐低温弱光指标进行了讨论，指出苗期番茄叶片叶绿素含量水平和低温弱光下MDA含量是选择耐低温弱光番茄品种筛选的重要参考指标。

Study on light and temperature in tunnel in the Spring at Hefei and tolerant index for the low temperature and poor light of tomato

Abstract: in order to learn light and temperature environment in tunnel at Spring, chose the index of tolerant to low temperature and poor light and select optimal tomato variety for tunnel culture at Hefei as well, the light and temperature environment inside and outside tunnel from March to April was studied, different varieties culture experiments and the effect of low temperature and poor light on physiological indicators including leaf chlorophyll content, Pn, MDA content and SOD activity were carried out. the results indicated that the averaged temperature is about 20 ℃ inside tunnel, 5℃ higher than outside, averaged light intensity 20 klx inside. The low temperature and poor light inside happened at cloudy and rainy weather. The low temperature and poor light inside happened at cloudy and rainy weather. The leaf chlorophyll content varied with different tomato varieties, variety “Meizhoubao” and “Tianfu168” higher in chlorophyll content and “Tianfu501” higher in Pn, which was consistent with tolerant capacity to temperature and poor light. Effects on leaf MDA content and SOD activity varied remarkably under low temperature and poor light, MDA content in both varieties “Tianfu501” and “Tianfu168” lower while SOD activity higher compared with the control. The low temperature and poor light environment and tolerant capacity to low temperature and poor light of tomato were discussed in the article, the leaf chlorophyll content at plantlet and MDA content under low temperature and poor light were concerned to be the reference index for tolerant capacity to low temperature and poor light of tomato.