【摘要】 研究了三个甘薯品种(金山57,金山1255和岩薯5号)生育过程中的生理特性表明,不同品种甘薯脱毒后均有显著增产效益,脱毒苗栽后表现茎叶生长,干物质积累多,结薯早,T/R值低,同化物同地下部分配,上述特征在生长前期表现更为突出。分析认为前期块根形成早,膨大快是脱毒甘薯增产的主要原因。更多还原

【Abstract】 The physiological character of yieldincreasing of virusfree sweet potato of three cultivars(Jinshan 57,Jinshan 1255,Yanshu5)was studied under field conditions.The results showed that the virusfree plant had higher yields than that of control,meanwhile they had faster stems and leaves grown,much more dry matter accumulated,sooner tubers expanded,lower T/R valus and more accumulation in root.These physiological character is obvious in early growth stages.It was suggested that the yieldincreasing attribute to its earlier formation of root and faster root expanding rates.更多还原