武威市凉州区皇冠梨营养品质分析研究

Nutritional quality of crown pear in Liangzhou district of Wuwei city

目的比较武威市凉州区皇冠梨与其他主产区皇冠梨的营养成分差异,并比较该地区皇冠梨和其他代表性商品梨的差异,从而为当地产业发展及消费者选购提供数据支撑。方法采集凉州区3个典型种植区域的皇冠梨样本24个、河北赵县皇冠梨样本8个、河北赵县雪花梨样本8个,检测梨果的矿物质、维生素和游离氨基酸等营养成分,并进行对比分析。结果武威市凉州区三地的皇冠梨维生素C含量达7.83 mg/100 g,高于河北赵县皇冠梨(3.87 mg/100 g)和雪花梨(2.33 mg/100 g)。在部分游离氨基酸和矿物质含量等代表梨果实营养价值的指标上,皇冠梨显著高于雪花梨。武威市凉州区三地的皇冠梨富含K、Ca、Fe、Sr、Se等多种矿物质,河北赵县皇冠梨含矿物质总量(含10种矿物质总量均值为951 mg/kg)显著低于武威市凉州区三地的皇冠梨含量(含10种矿物质总量均值分别为1266、1324和1326 mg/kg)。此外,同在武威市凉州区,3个采样地点的皇冠梨矿物质含量差异也较为显著,其中黄羊河农场皇冠梨中矿物质含量高于武威市其他2个地区。结论武威凉州区三地的皇冠梨相对于河北赵县皇冠梨,有着基本一致的口感,但营养品质较高。对于同样的皇冠梨品种,产地差异对其营养品质有较大影响。

Objective To compare the nutritional compositions of crown pears between Liangzhou district of Wuwei city and other crown pear＇s main producing areas, and also between crown pear and other representative commercial pear, so as to provide data support for the development of local industry and consumer purchase. Methods Pear samples including 24 crown pear samples from 3 representative places in Liangzhou district, 8 crown pear samples from Zhaoxian in Hebei province and 8 snowflake pear samples also from Zhaoxian in Hebei province were collected. The content of nutritional ingredients including vitamin, minerals and free amino acids were detected, and the contrast analysis was carried out. Result The vitamin C content of crown pear in 3 places of Liangzhou district of Wuwei city was 7.83 mg/100 g, which was significantly higher than that of crown pear in Zhaoxian of Hebei province（3.87 mg/100 g） and snowflake pear（2.33 mg/100 g）. The crown pear was significantly higher than that of snowflake pear on the indexed of some free amino acids and mineral element content. Crown pear from Liangzhou district of Wuwei City was rich in minerals especially K, Ca, Fe, Sr, and Se. The total mineral elements in crown pear from Zhaoxian of Hebei province（the mean value of total content of 10 kinds of mineral elements content was 951 mg/kg） was significantly lower than those of Liangzhou district of Wuwei city（the mean value of total content of 10 kinds of mineral elements content were 1266, 1324 and 1326 mg/kg, respectively）. Among 3 planting areas of Liangzhou district, their crown pear＇s mineral element content also had significant differences, and crown pear in Huangyang river farm had much higher mineral elements content than the rest of 2 places in Wuwei city. Conclusion The crown pear from Liangzhou district of Wuwei district has basically consistent taste with the crown pear form Zhaoxian of Hebei province, but it has higher nutritional quality. For the same crown pear varieties, the difference of origin has a great influence on the fruit nutritional quality.