“红星”苹果新梢迅速生长期间 ,用10 B标记其中部成熟叶 ,10d后 ,非标记部位Bdff值 (μg)之和约为标记部位的 1 5倍。向新梢顶部嫩叶的运输量高于基部老叶。“辽伏”苹果花期整株根外施10 B 35 0 μg·ml-1,5d后 ,硼肥利用率为 5 2 % ,地上部新生器官10 B分配率最高 ,根部10 B甚微。根外追施的10 B在成熟组织中有较强的移动性 ,可运送到新生器官。 During the rapid growth of “Red Star” shoots, the middle mature leaves were marked with 10 B, and after 10 days, the sum of Bdff values ​​(μg) at non-labeled sites was about 15 times higher than that at the labeled sites. The flowering of young leaves to the top of shoots is higher than that of the old leaves at the base. After the application of 10 B 35 0 μg · ml-1, 5d, the rate of boron fertilizer application was 52% in the whole plant of “Liaoyu” apple blossoms, and the distribution ratio of 10 B was the highest in shoots and 10 B in roots. Top 10B is superior in mature tissues and can be delivered to new organs.