挂串密度对晾房干燥吐鲁番无核白葡萄干品质的影响

为了探讨无核白葡萄晾房干燥挂串密度对无核白葡萄干品质指标的影响。以产自新疆吐鲁番的无核白葡萄作为研究对象,分别以1:0.5、1:0.75、1:1的密度进行晾房干燥挂串,对无核白葡萄干成品的外观、果粒均匀度、破损果粒率、干燥时间、总糖、V_C等6项指标进行分析,探究挂串密度对晾房干燥吐鲁番无核白葡萄干品质的影响。结果表明:1:0.5密度挂串的葡萄干外观、果粒均匀度达到一级要求的概率分别为83%、85%,破损果粒率为11.5%,干燥时间为26 d,总糖平均含量为701.9 mg/g,V_C平均含量为7.05 mg/100 g;1:0.75密度挂串的葡萄干外观、果粒均匀度达到一级要求的概率分别为85%、86%,破损果粒率为12.0%,干燥时间为26 d,总糖平均含量为702.4 mg/g,V_C平均含量为7.34 mg/100 g;1:1密度挂串的葡萄干外观、果粒均匀度达到一级要求的概率分别为80%、85%,破损果粒率为17.3%,干燥时间为28 d,总糖平均含量为691.5 mg/g,V_C平均含量为7.21 mg/100 g。其中1:0.5及1:0.75密度挂串的干燥速率显著高于1:1密度(p<0.05);1:0.75密度挂串的葡萄干平均糖度含量及平均V_C含量显著高于1:0.5密度及1:1密度(p<0.05)。根据无核白葡萄干成品的6项指标的综合考虑,确定1:0.75的葡萄晾房挂串密度为最佳晾房干燥挂串密度。

Effects of distribution density on Turpan seedless white grape in air-curing barn drying

In order to explore the effects of distribution density on qualityof raisins which are seedless white grape dried in air-curing barn. The distribution density of Turpan seedless white grape was 1:0.5,1:0.75,1:1 in air-curing barn,respectively. The appearance,degree of uniformity,breakage rate,drying rate,total sugar content,V_C content were analyzed against different distribution density. The results showed that when distribution density was 1:0.5,the raisins could meet the requirements of first grade the appearance and degree of uniformity was 83% and 85%,breakage rate was 11.5%,drying time was 26 d,total sugar content and V_C content was 701.9 mg/g and 7.05 mg/100 g,respectively;when distribution density was 1:0.75,the raisins could meet the requirements of first grade the appearance and degree of uniformity was 85% and 86%,breakage rate was 12.0%,drying time was 26 d,total sugar content and V_C content was 702.4 mg/g and 7.34 mg/100 g,respectively;when distribution density was 1:1,the raisins could meet the requirements of first grade the appearance and degree of uniformity was 80% and 85%,breakage rate was 17.3%,drying time was 28 d,total sugar content and V_C content was 691.5 mg/g and 7.21 mg/100 g,respectively. The drying rate of distribution density was 1:1(p<0.05)that lower than others,while the content of sugar and V_C was the highest in raisins which distribution density was 1:0.75. According to the comprehensive analysis of six indexes of non-nuclear white raisins’ products,1:075 was the best density of hanging stings.