不同保鲜预处理对绿竹笋呼吸速率的影响

Effects of different fresh pretreatments on the respiration intensity of Dendrocalamopsis oldhami shoots

根据对绿竹Dendrocalamopsis oldhami竹笋的3种保鲜预处理方法试验,测定了不同处理在20 h内和7 d内的绿竹笋的呼吸速率。结果表明：绿竹笋采收后,采用常温条件保存,笋体的呼吸速率增加很快,在4-6 h时呼吸速率（CO2）达最高峰,为163.81 mg·kg^-1·h^-1;用冰水预冷处理的绿竹笋在14-16 h时达到最高峰,为138.66 mg·kg^-1·h^-1;用冰水处理同时以10 mg.g-1壳聚糖涂膜处理的竹笋在14 h左右达最高峰,为113.43 mg·kg^-1·h^-1;经冰水预处理和10 mg·g^-1壳聚糖涂膜处理的竹笋在采后7 d内维持笋体的低呼吸速率,可以抑制笋体呼吸作用。

The respiration intensity of Dendrocalamopsis oldhami shoots pretreated by 3 different methods（1 is boxed at constant temperature,2 is pre-cooling in ice water for 2 h,then stored in the thermal container,3 is pre-cooling in ice water for 2 h,daubed by 10 mg·kg^-1 chitose,then stored in the thermal container）in 20 h and 7 days was tested.The results showed that the respiration rate would increase quickly if the shoots were stored in the normal temperature and reach the peak value in 4-6 h,which was 163.81 mg·kg^-1·h^-1CO2,the respiration rate would reach the peak in 14-16 h if the shoots were stored in the ice water,which was 138.66 mg·kg^-1·h^-1 CO2,the respiration rate would reach the peak in 14 h if the shoots were pre-cooling in the ice water and treated with 10 mg·g^-1 chitose,which was 113.43 mg·kg^-1·h-1 CO2.Shoots pretreated with ice water and 10 mg·g^-1 chitose would maintain a low respiration rate within 7 days.Therefore,such treatment could restrain the respiration of shoots.