摘要
以盆栽不饱满芽(春梢基部芽)、次饱满芽(秋梢芽)和饱满芽(春梢中部芽)‘嘎啦’苹果(Malus×domestica‘Gala’)/八棱海棠(Malus micromalus Makino)嫁接幼苗为试材,采用15N、13C双标记法,研究了其碳、氮营养分配特性。结果表明,新梢开始旺长期叶片13C分配率不饱满芽幼苗>次饱满芽幼苗>饱满芽幼苗,分别为45.81%、42.49%、35.05%;根部13C分配率饱满芽幼苗>次饱满芽幼苗>不饱满芽幼苗,分别为20.04%、15.88%、12.67%。新梢旺长期3种芽幼苗叶片、根部13C分配率趋势与新梢开始旺长期相反。新梢缓长期各芽苗叶片碳同化物分配差异不显著,根部13C分配率,次饱满芽幼苗和不饱满芽幼苗显著高于饱满芽幼苗。叶片15N分配率逐渐升高,始终为饱满芽幼苗>次饱满芽幼苗>不饱满芽幼苗,至新梢缓长期分别达到55.67%、52.45%和51.54%。根部15N分配率随生长发育而降低,新梢开始旺长期和新梢旺长期不饱满芽幼苗>次饱满芽幼苗>饱满芽幼苗。新梢缓长期各器官氮素分配率差异不显著。不同芽幼苗13C固定量、15N利用率均逐渐升高并趋于一致,表明芽有同等更新潜质。
Different plumpness buds were used to study the distribution and utilization of ^13C and ^l5N using two-year-old potted Gala apple trees （Malus × domestica/Malus micromalus Makino） as materials under high N-level conditions. The results showed that the distribution ratios of ^13C in leaves during the shoots early vigorous growing period ranked in the following order： Plumpless bud tree 〉 secondary bud tree 〉 plump bud tree, but the rank was plumpless bud tree 〈 secondary bud tree 〈 plump bud tree in roots at the same period. The ranks were opposite in leaves and roots of the distribution ratios of ^13C at the vigorous growing period. The ^13C distribution ratio in roots of plump bud tree was lower than that of secondary bud tree and plumpless bud tree at the slow growth period. The distribution ratios of ^l5N in leaves of plump bud, secondary bud and plumpless bud increased, and reached the highest at the slow growth period, which were 55.67%, 52.45% and 51.54% respectively. The ^l5N distribution ratios in roots decreased significantly with the process of growth. However, the ^l5N distribution ratio in roots of plumpless bud tree was the highest, followed with secondary bud tree and plump bud tree at the early vigorous growing period and vigorous growing period. There was no significant difference at the slow growth period. The utilization ratio of the N fertilizer and ^13C fixed capacity were improved gradually with the growth and development of the trees. Different plumpness buds tree can achieve results of renewal potential.
出处
《园艺学报》
CAS
CSCD
北大核心
2013年第2期317-324,共8页
Acta Horticulturae Sinica
基金
现代农业产业技术体系建设专项项目(CARS-28)
公益性行业(农业)科研专项项目(201103003)
山东省农业重大应用创新课题(201009)
