不同播期对宁夏粉用马铃薯生长和品质的影响

以‘宁薯4号’和‘陇薯3号’为试验品种，2008年在宁夏西吉县进行了粉用马铃薯不同播期试验，研究其对粉用马铃薯生长与品质的影响。结果表明，适当推迟播期有利于缩短马铃薯的生育期，对于两品种而言，‘陇薯3号’生育期又比‘宁薯4号’要短，4月13日和4月20日播种的‘陇薯3号’比同期的‘宁薯4号’分别提前了32天和16天开花；不同播期与叶面积指数、单株（茎）叶面积、叶片总面积之间关系密切，选择适宜的播期有利于提高叶面积指数；‘宁薯4号’选择在4月20日左右播种及5月25日左右播种时能够获得品质更优的粉用马铃薯，淀粉含量和还原糖含量分别为58.85%、0.1%和57.28%、0.044%，‘陇薯3号’选择在4月20日左右进行播种能够得到品质性状更优的粉用马铃薯，淀粉含量和还原糖含量分别为53.88%、0.038%。不同播期商品率有所不同，‘陇薯3号’商品率略高于‘宁薯4号’。

Effects of Different Sowing Periods on Growth and Quality of Starch Potato in Ningxia

The potato with 'Ningshu-4' and 'Longshu-3' were taken as experimental material,and the field experiments of starch potato in Xiji,Ningxia Province,which were conducted to study the effects of different sowing periods on growth and quality of starch potato.The results showed that appropriate to defer the date of starch potatoes in favor shorter growth period,for the two varieties,growth period of ' Longshu-3 ' was shorter than ' Ningshu-4 ',' Longshu-3 ' sowed on April 13 th and April 20 th and the flowerin...