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试材为盆栽的六年生辽伏/莱芜海棠,于1982年秋每株施4克丰度为9.3％的(~(15)NH_4)_2SO_4,在翌年主要物候期进行植株解析测定,结果表明,~(15)N在树体内的运转、分配基本随着生长中心的转移而转移。早春~(15)N肥分配率根系占55％,地上部新生器官仅占11％,随着新生器官发育的进展,分配到新梢、叶片与幼果中的~(15)N量增加。当新梢缓慢生长进入花芽分化期时,短枝及种子所在的果心部位~(15)N量显著增加,说明贮藏~(15)N有再分配、再利用的特性。 贮藏~(15)N主要利于早春根系、花、幼果、叶等新生器官的生长,根系的第二次生长(夏季)及一年生以上枝条的加粗生长所需的N主要依靠当年从土壤中吸收。
The test material was potted perennial Liaowu / Laiwu Begonia. In the autumn of 1982, the abundance of 4 grams per plant was 9.3% (~ (15) NH_4) _2SO_4, and the plant phenophase was measured in the following phenophase. The results showed that ~ (15) N Movement within the tree, the distribution of the basic transfer as the growth center and transfer. In the early spring ~ (15) N fertilizer allocation rate accounted for 55% of the roots, aerial shoots accounted for only 11% of new organs, with the development of new organ development, distribution to the shoots, leaves and young fruits in the amount of N increased. When the shoots grew slowly into the flower bud differentiation stage, the amount of ~ (15) N in the core of the shoots and seeds was significantly increased, indicating the redistribution and reutilization of ~ 15N in storage. The storage of ~ (15) N is mainly beneficial to the growth of new organs such as roots, flowers, young fruits and leaves in early spring. The second growth of the root system (summer) and the thick growth of branches above annual mainly depends on the amount of N absorb.