不同晾房晾制吐鲁番无核白葡萄的干燥特性及品质比较

Drying characteristics and quality of Turpan seedless white grape in different drying rooms

针对吐鲁番地区的土坯晾房、砖结构晾房和棚架晾房3种不同材料建造的晾房,比较西南、东南、南北、东西4个走向下的无核白葡萄干燥时间、绿品率、糖度、维生素C含量、感官指标及色泽(包括L^*、a^*、b^*平均值及R、G、B值)。结果表明:在砖结构晾房和土坯晾房中,西南走向中的无核白葡萄干燥时间均为24 d,绿品率分别为32%,24%,糖度分别为721.3,719.6 mg/g、维生素C含量分别为7.84,7.65 mg/100 g,效果显著优于东南、南北、东西走向。而棚架晾房除干燥时间较短外,其他各方面品质均显著低于砖结构晾房和土坯晾房。结合L^*、a^*、b^*平均值及R、G、B值综合分析可知,长轴迎风建造的西南走向的砖结构晾房在干燥速率及葡萄干品质方面都优于其他几组晾房,为最佳干燥晾房。

The drying time,green rate,sugar content,V C content,sensory index,and color(including the average value of L^*,a^*,b^*,R,G,B,etc)of seedless white grape in southwest,southeast,north-south,and east-west directions were compared for three kinds of drying houses constructed with different materials in Turpan area.The results showed that in brick drying house and adobe drying house,the drying time of seedless white grape in southwest direction was 24 days,the rate of green product was 32%and 24%,the sugar content was 721.3 mg/g and 719.6 mg/g,the content of V C was 7.84 mg/100 g and 7.65 mg/100 g,respectively.The effects were significantly better than that in southeast,north-south and east-west direction.In addition to the short drying time,other aspects of the quality of the shed frame drying house were significantly lower than the brick drying house and adobe drying house.Combined with the comprehensive analysis of the average values of L^*,a^*,b^*,R,G and B,it can find that the southwest oriented brick structure air drying house constructed by the long axis of the air drying house is superior to other groups in terms of drying rate and raisin quality,which is the best air drying house.