Abstract:The aim of this work was to investigate the efficiency of film/gauze covering on anti-chilling for pineapple in winter.The micro-environmental air temperature and humidity,light intensity,as well as soil temperature of the three treatments,namely film mulching and gauze covering (FM+GC),film mulching (FM) and no film-mulching but gauze covering (NF+GC),were compared with control (no film-mulching,NF).Also,the growth tendency of pineapple plants and fruits,as well as quality,color aspects and aroma components of pineapple fruits were monitored and compared.The results indicated:(1)FM+GC,FM and NF+GC increased the micro-environmental air temperature when compared with control.FM+GC and NF+GC increased the air humidity around one day.By FM,the air humidity was increased before 10:00 and then slightly decreased after 11:30.FM+GC and NF+GC decreased the light intensity,while NF slightly increased.FM+GC,FM and NF+GC increased the temperature of soil.(2)FM+GC,FM and NF+GC promoted the initiation of newly growing leaves and increased their length.FM+GC,FM and NF+GC increased the longitudinal and transverse diameters as well individual weight of pineapple fruits.No significant differences were observed when compared the TSS,TA (Titratable acidity) and TSS/TA ratio of the three treatments with control.(3)FM+GC and FM increased the values of L*,a* and b* of pineapple skin,whereas,NF+GC decreased.FM+GC increased the values of L*,a* and b* of pineapple pulp and NF+GC decreased,while,FM increased L* and decreased a* and b*.(4)FM+GC decreased the total content of ester aroma components and increased that of alkene components,while,the change tendency was inverted by FM and NF+GC.This present work suggested that Film/GC covering effectively prevented the pineapple from chilling and promoted the growth of pineapple plants and fruits in winter.Film/GC covering slightly affected the quality properties of pineapple fruits.GC covering negatively affected the coloration and the aroma components of pineapple fruits ripened in winter-spring seasons in some degree.