核桃主要器官钾含量及分配的动态规律

Dynamics of contents and distribution of potassium in main organs of Juglans regia

对核桃主要器官钾含量动态变化规律及器官间钾含量的分配比例进行研究,结果表明:钾在核桃各器官的变化规律与其自身的生长规律相吻合,在整个生育期,以树体萌芽期各营养器官的钾含量最高,雌花或幼果的钾含量也相对较高;在枝条旺盛生长及果实速长期,各主要器官的钾含量呈下降趋势;在种仁充实期,果实钾含量急剧上升,而叶片和枝条的钾含量继续下降。在整个生育期,早、晚实核桃主要器官间钾含量的分配比例有很大共性,即在各器官中果实钾含量所占比例基本保持较高态势,而果枝和营养枝中钾含量所占比例总体呈下降趋势,并且下降的幅度较大。

Studies on dynamics of potassium contents in main organs and its distributed proportion among organs of Juglans regia in different growth stages were conducted.The results showed that： the variations of potassium contents in organs were cooperated with its annual development.In the whole development period,the potassium contents were highest in the nutritional organs during germination stage,and the female flowers and young fruits had the relative elevated potassium contents.The potassium contents in main organs decreased during fast growth stages of neonatal branch and fruit.The potassium contents in fruits increased dramatically in the kernel filling stage while potassium contents in leaves and branches kept on decreasing.It was common for the distributed proportion of potassium contents in main organs for the early-and late-fruiting Juglans regia in the whole development period,namely,in each organ,the ratios of potassium contents in fruits were always the highest,while the ratios of potassium contents in the fruiting and the vegetative shoots decreased totally and with a big margin.