【摘要】 不同甘薯品种特性研究结果表明：金山１２５５ 产量最高，与福薯１９３３ 和赣６４ － ２８３ 相比均达显著水平和极显著水平。金山１２５５ 产量高的机理是光合面积大， 光合效率高，地上部与地下部生长协调，源、库转换快，具有较高的生物产量和经济系数；福薯１９３３ 前期生长快，整个生育期生长旺盛， Ｔ／ Ｒ 值较高，所以生物产量和经济系数为偏低；常规品种赣６４ － ２８３ 前期生长弱，全生育期生长较弱，光合面积小，生物产量和经济系数均很低。更多还原

【Abstract】 The study on characteristics of sweet potato suggests that Jingshan 1255 has the highest yield among the three different varieties and it can reach a significant and most significant level as compared with Fushu 1933 and Gan 64-283. The following are the main reasons for the high yield of Jingshan 1255: large photosynthesis area, high photosynthesis efficiency, accordant growth of over ground and underground parts, rapid source-sink transformation, higher biological yield and economic coefficient. Fushu 1933 has a rapid growth at early stage and a luxuriant growth in the whole growing period. Its T/R ratio is higher. As a result, both its biological yield and economic coefficient tend to be low. Gan 64-283, a conventional variety, is weak not only at its early stage but also in the whole growing period. Its photosynthesis area is small so that its biological yield and economic coefficient are very low.更多还原