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温州蜜柑接近成熟时 (9月 2 1日 ) ,通过叶面喷雾或环状沟施 Na H2 3 2 PO4 。叶面施磷时树体对磷吸收转运较快 ,施入后 1d就有吸收的磷素转运到未施部位春梢叶片 ,15 d时叶片积累量达到高峰 ;土壤施磷时树体对磷吸收转运缓慢 ,施入后 2 5 d始有吸收的磷素转运到春梢叶片 ,35 d积累达到高峰。施磷方式不同时磷在树体内的分配存在差异 :土壤施用时磷主要沿枝梢木质部运输分配 ,叶面喷施时则主要沿韧皮部运输分配。
Satsuma mandarin near maturity (September 21), through the foliage spray or annular ditch Na H2 3 2 PO4. When phosphorus was applied on leaves, the uptake and transport of phosphorus by the tree was rapid. After 1 d of application, the absorbed phosphorus was transported to the spring shoots of non-applied parts and the accumulation of leaves reached the peak on the 15th day. Absorption and transport slow, after application of 25 days after the absorption of phosphorus transported to spring shoots leaves, the accumulation of 35 d peak. Phosphorus distribution in the tree differed when phosphorus was not applied at the same time. Phosphorus was mainly distributed along the shoot xylem when soil was applied, while phloem was mainly distributed when foliar spray was applied.