马铃薯早熟品种产量和维生素C含量在不同生育阶段的表现

马铃薯富含维生素C,是人类获得维生素C的重要来源。本研究测定2个早熟马铃薯品种(东农303和Jemseg)产量及维生素C含量在不同生育阶段的表现。2004年从7月1日起每周取一次样,每次取3株,共取9次,测定单株结薯个数,单株薯重,及维生素C含量。东农303单株结薯个数较多,多达9个。和东农303相比,Jemseg结薯数较少,平均4个左右。但是,就产量而言,东农303从7月22日起始终高于Jemseg。东农303在生长发育期间维生素C含量的变化呈抛物线形式,8月5日达到最大值,然后逐渐减小。Jemseg的变化曲线和东农303的相似,但最高值出现在7月29日。维生素C含量东农303高于Jemseg。东农303是高产高维生素C的品种。

Yield and Vitamin C Content of Early Maturing Potato Cultivars at Different Stages of Growth

Potato is rich in vitamin C, and is an important source of vitamin C for mankind. In this research, two early maturing potato cultivars, Dongnong 303 and Jemseg, were investigated for their tuber yield and vitamin C content at different stages of growth. The first sample was made in July 1,2004, and thereafter samples were taken continuously at an interval of one week. Three plants of each cultivar were taken when sampled, and totally 9 samples were made for each of cultivar. Compared with the cultivar Dongnong 303, Jemseg set fewer tubers, averaging about 4 per plant. But for tuber yield, Dongnong 303 was higher than Jemseg after July 22. The change in vitamin C content in tubers of Dongnong 303 was in the form of parabola, reaching maximal value at August 5, and decreasing afterwards. Jemseg was much similar to Dongnong 303 for the change in vitamin C, except for the date the peak value appeared. For Jemseg, the maximal value is at July 29. Dongnong 303 had advantage over Jemseg for vitamin C content. The data in this experiment indicated that Dongnong 303 is a high yielding and high vitamin C cultivar.