Study on the storability of main breeds of lettuce produced in Beijing

In order to understand the difference of resistance to storage in different breeds of lettuce in Beijing region, sensory quality, weight loss rate, chlorophyll content, respiration intensity, relative conductivity, PPO activity were measured in 10 main varieties ( Xiang Sheng 2 Hao, Nai You, Zi Luo, Zi Ye, Da Su Sheng, Luo Ma, Hong Ju Ju, Jie Qiu, Luo Sha Hong, Luo Sha Lv) .The result showed that during the storage period, according to the index analysis, in Beijing area, the order of storage property from weak to strong was Xiang Sheng 2 Hao, Zi Ye, Nai You, Da Su Sheng, Zi Luo, Luo Sha Hong, Luo Sha Lv, Jie Qiu, Hong Ju Ju and Luo Ma, while loose leaf lettuce was the worst with a bad quality, globular lettuce was in the middle, erect lettuce had a best storage property.The thicker and shape structure of leaf was more favorable to weaken the respiration and transpiration and enhance the storage property.