Effects of different nutrient solution temperatures on quality and tipburn of lettuce in plant factory
To promote the growth of lettuce in artificial light plant factories and reduce the incidence of tipburn of lettuce,this experiment took'Italian'and'Luya'lettuce as test materials,adopted nutrient solution cultivation method,and set three different nutrient solution temperatures including T1(16 ℃),T2(21 ℃)and T3(26 ℃)to analyze the effects of different nutrient solution temperatures on lettuce quality and tipburn.The results showed that:With the increase of liquid temperature,the quality of lettuce was significantly improved at lower temperature,and reached the maximum at 26 C.Compared with 16℃,the soluble sugar content of'Italy'and'Luya'increased by 66.79％and 66.98％,respectively.Root activity increased by 105.83％and 107.15％;Total phenols increased by 21.86％and 18.75％;Flavonoids increased by 33.17％and 35.35％;Chlorophyll and net photosynthetic rate were the highest among all treatments.The increase of liquid temperature reduces the incidence and severity of tipburn.In summary,when the nutrient solution temperature is 26 ℃,the quality of lettuce is improved the most.This study is of great significance for the high-quality production of facility vegetables.
lettuceplant factoryroot zone temperaturetipburnnutritional quality
国家科技期刊平台
NSTL
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