不同季节苹果树主要器管形态营养诊断苹果树的一切生命活动都需要消耗营养物质。果树树体营养状况好坏，主要是指有机营养物质和无机营养物质的合成、施入、利用、消耗、贮存的水平高低。苹果栽培的管理技术中，很重要的一项是给树体补充、增加营养物质。要使苹果树丰产，... Apple tree in different seasons the main tube morphology Nutritional diagnosis Apple tree all the life activities need to consume nutrients. The nutritional status of fruit trees is good or bad, mainly refers to the organic nutrients and inorganic nutrients synthesis, application, use, consumption, storage levels. Apple cultivation management techniques, a very important one is to add to the tree, increasing nutrients. To make the apple tree yielding, ...