筛选适应于低温贮藏的马铃薯加工品种

EVALUATION OF POTATO PROCESSING QUALITY WITH DIFFERENT TEMPERATURES UNDER WINTER STORAGE

通过对不同贮藏温度下马铃薯块茎的还原糖含量及加工品质色泽指数的测定，筛选出在简易库房贮藏条件下（４～１０℃）适于加工的品种为国引ｌ、１１、１３、２、１２号，这些品种经过３个月的低温贮存还原糖积累水平较低（＜０．５％），色泽指数小（＜２０），加工品质好．冷贮（０～２℃）和冷贮一回暖（１５～１７℃）处理结果表明，冷贮导致块茎中还原糖含量大幅度提高，色泽指数显著增大．而经过回暖处理后，还原溏含量下降，色泽指数变小，但不同的品种经不同的处理时间回暖效果不一。国引１、２号经过３０天的回暖处理，加工品质达到商业要求．

The cultivars that arc fit to process after storage in simply quipped storerooms (4-- 10t)were sclcctcd by testing the reducing sugar contents and colour indexes of potato tubers.These cultivars included GY1, GY11, GY13, GY2 and GY12, which had lower reducing sugar contents (< 0.5%) and colour indcxcx (<1 .0) after three months storage in low tcmpcraturcs. Cold storage (0～2℃) resulted in great increase of reducing sugar contents and colour indexes of potato tubers. Reconditioning (15℃ after cold storage) helped dccrcasc the reducing sugar contents and coloiur indexes. But the effects or reconditioning were different among cultivars. The reducing sugar cofitcnts and colour indexes of GY1 and GY2 cultivars were low enough to meet the demands of processing after thirty days of reconditioning.