半矮化型、紧凑型、普通型桃树枝条和叶片特征比较

利用紧凑型爱保太、普通型瑞光3号和半矮化种质SD-9238等3种生长型桃品种或株系的嫁接苗为材料,对其枝条和叶片的特征进行了调查研究。结果表明:(1)半矮化型SD-9238、紧凑型爱保太和普通型瑞光3号在一次枝长度上没有显著差异,但半矮化型和紧凑型的枝条较普通型短12.5%左右;节间长度方面,半矮化型<紧凑型<普通型,且差异均达到显著水平,一次枝节间长度差异达极显著水平;紧凑爱保太的分枝角度显著大于普通型和半矮化型。(2)萌芽率和成枝率均为紧凑型>普通型>半矮化型,萌芽率差异达显著水平,紧凑型的成枝率最高,与普通型、半矮化型差异达极显著水平,半矮化型成枝率比普通型低10.6%;半矮化型平均每个母枝萌发中长枝4.6个,低于普通型和紧凑型的6.5个和9.8个。(3)3种生长型的叶片长度没有显著差异,半矮化型叶片显著窄于其他类型;紧凑型的叶片干物质含量低于普通型和半矮化型,而后2者间没有明显差异。

Branch and leaf characteristics of different peach tree growth types

Branch and leaf characteristics of SD-9238, Compact Elberta and Ruiguang No.3, belonging to semi-dwarf type, compact type and standard type respectively, were investigated in this study. The rootstock used for grafting the scion was seedlings of wild peach Prunus persica (L.) Batsch.. The results showed that: (i) There was no significant difference in length of 1st order branches. But the length of semi-dwarf type and compact type's branches were 12.5% shorter than that of standard type. There were significant differences in internode length among them, appearing semi-dwarf