梁平柚矮化砧木的筛选

Selection of Dwarfing Rootstock for Liangpingyou (Citrus grandis Osbeck)

供试柚品种为梁平柚,砧木为枳、香橙、宜昌橙和酒饼簕、以酸柚砧为对照。1983年秋嫁接,1984年秋定植。7年观察结果表明,酒饼簕、宜昌橙、枳对梁平柚有矮化作用,其中以酒饼簕最明显。枳砧梁平柚定植后第2年(1986年),有1/3的植株试花,第3年全部开花,结果最多的一株达8个;香橙、宜昌橙、酸柚砧(对照)梁平柚定植后第3年试花;酒饼簕砧梁平柚第5年试花。枳砧梁平柚树高、树冠体积、枝条电阻值、枝条节间长度等均明显低于对照。初步认为,枳是梁平柚比较理想的矮化砧木。

the experiment was conducted with Liangpingyou (Citrus grandis Osbeck)grafted on trifoliate orange (Poncirus trifoliata Raf. ),Xiangcheng(Citrus junos sieb. ex Tan. ),Ichang papeda(C.ichangenesis Swing. ) and chinese box-orange(Severinia buxifolia Oliv),and those grafted on a traditional rootstock, local sour pummelo (Citrus grandis Osbeck)as control. The observation in 7 years after planting primarily showed that Chinese box-orange, Ichang papeda and trifoliate orange had dwarfing effects on Liangpingyou, In the second year after planting, one-third of the trees on trifoliate orange came into bloom and all trees came into bloom and bore fruit in the third year. The trees on Xiangcheng, Ichang papeda and sour pummelo rootstocks came into bloom in the third year, and those on Chinese box-orange in the fifth year. The plant height, crown volumn, tissue electrical resistance and twig inter-node length of Liangpingyou on trifoliate orange are significantly lower than those of control. It is preliminarily suggest that trifoliate orange is a preferable dwarfing rootstock for Liangpingyou.