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以3年生T337自根砧富士苹果幼树为试材,年生长周期内定期整株取样,并将整树解析为主根木质部、主根韧皮部、细根、砧木木质部、砧木韧皮部、主干木质部、主干韧皮部、叶片、新梢9部分,分别测定各部位不同时期的生物量和N含量。结果表明,T337自根砧富士苹果幼树各时期各部位N含量为叶片最高,新梢、细根、韧皮部相对较高,而木质部最低。树体各器官干物质和N分配量、分配比率均为营养器官叶片、新梢和细根高于贮藏器官木质部和韧皮部。总干物质与N积累量均为生长后期较高,定植后30~120 d树体干物质积累量占总积累量31.46%,120~180 d树体干物质积累量占68.54%;定植后30~90 d树体N积累量占总积累量37.65%,90~120 d占13.48%,120~180 d占48.87%。
Taking the 3-year-old T337 self-rooted Fuji apple tree as test material, the whole plant was sampled regularly during the annual growth cycle and the whole tree was analyzed as the main root xylem, phloem of main root, rootstock xylem, rootstock phloem, trunk xylem, trunk phloem , Leaves, shoots 9 parts, were measured in different parts of different periods of biomass and N content. The results showed that the content of N was the highest in all parts of Fuji apple tree seedlings of T337 self-rooted. The shoots, fine roots and phloem were relatively high while the content of xylem was the lowest. The dry matter and N content of all organs of the tree, the distribution ratio of vegetative organs leaves, shoots and fine roots than the xylem and phloem of storage organs. Total dry matter and N accumulation were higher at the later growth stage. The total dry matter accumulation of the tree body accounted for 31.46% and the dry matter accumulation of the tree body accounted for 68.54% from 30 to 120 days after colonization. After the planting 30 The accumulative amount of N in the tree at the 90 d was 37.65%, that at 90 ~ 120 d was 13.48%, and it was 48.87% at 120 ~ 180 d.