论文部分内容阅读
盆栽辽伏／海棠新梢迅速生长期，土施１０Ｂ肥１个月后，硼肥利用率为７０％。１０Ｂ在根系、多年生枝干及地上部新生器官的分配率依次为：２４４％，４６６％，２９０％；新生器官中，长梢及其叶片对１０Ｂ的竞争能力强，具Ｂｄｆ％值高于其它梢类及叶片。施硼初期，叶片的全硼及Ｂｄｆ％值上升较快，但生长季末期，叶片的全硼含量下降，Ｂｄｆ％值上升缓慢，而枝梢皮部及木质部全硼、Ｂｄｆ％值持续升高，表明１０Ｂ的分配中心随生长季而变化。根部及枝干部积累的硼，对新生器官中硼的供应有调节作用，对根系停止供硼，能加速植株体为积累的硼向新生器官输送。秋季土壤中施浓度为２μｇ·ｇ－１１０Ｂ肥，第３年春季土壤中Ｂｄｆ％值在５％以下，新生器官中Ｂｄｆ％值仍达２０％～３０％，表明植株内贮藏的部分１０Ｂ能继续被新生器官利用。
Potted Liaowu / Begonia shoots rapid growth period, soil application of 10B fertilizer after 1 month, boron fertilizer utilization rate of 7 0%. 10B In the root system, the allocation rate of newborn organs in perennial branches and shoots was 244%, 466% and 290%, respectively. Among the newborn organs, the shoots and their leaves were highly competitive with 10B, Bdf% value is higher than other shoots and leaves. In the early stage of boron application, the total boron and Bdf% increased rapidly, but at the end of the growing season, the total boron content of the leaves decreased and the Bdf% value increased slowly, while the Bdf% value of the branches and the xylem continued to increase , Indicating that the distribution center of 10B varies with the growing season. The accumulation of boron in roots and stems has a regulatory effect on the supply of boron in new organs, stops the supply of boron to the roots, and accelerates the transport of accumulated boron to new organs. The concentration of Bdf in soil was 2μg · g-110B in autumn, the value of Bdf% in soil was less than 5% in the third year, and the value of Bdf% was still 20% -30% in new organ, which indicated that the part 10B stored in the plant could continue It is utilized by newborn organ.