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|標題:||The Relationship between New Shoot Growth and Carbohydrates, Nitrogens in Mulberry Tree|
The percentage and duration of budbreak were observed from two-year-old potted Taisan 2 mulberry tree (Morus alba L. var. asidosa G.) which were prunned in four different seasons. The duration and percentage of budbreak tended to be longer and lower in the winter pruning trees than that of the others. The treatment of calcium cyanamide seemed to affect greater on winter pruning trees which showed to promote budbreak and shoot growth. Both contents of total carbohydrates and starch increased proportionately with the growth of new shoot on spring pruning trees, which contained the lowest amount in shoots, trunk, and roots. The content of total sugar contained greater amount for autumn pruning plants than that for the other seasons. Both contents of total protein nitrogen in trunk decreased with the growth of new shoots after the spring or winter pruning, while both nutrients in plant increased only in the plant after the summer and autumn pruning. When shoots was treated with calcium cyanamide, the increase of total sugar towards the budbreak occurred earlier in both of the spring and the summer pruning. On the other hand, the accumulation of starch in harvest stage increased for the autumn and winter budforcing plants, and the accumulation of non-protein nitrogen also increased in roots for the autumn pruning plants.
|Appears in Collections:||第16期|
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