商品詳情
磷在植物的能量管理(ADP-ATP)中很重要,並在果實發育中發揮作用。對於新的根系形成,可利用的磷在移植後的小植株生長過程中尤其重要。土壤磷肥需要溶磷菌的幫助讓植物比較容易吸收。
缺磷可能發生的情況
(1)它傾向於發生在磷酸不足的土壤中,或在磷酸吸收係數高的土壤中,例如酸性土壤或火山灰土壤中,並且發生時間短。
(2)在低溫時期,磷酸的吸收顯著降低,因此容易發生不足。
(3)堆肥的施用量極少,並且當磷酸的施用量少時趨於發生。
(4)在水耕法中,磷含量不足時容易發生。
診斷要點
(1)注意發病時間。在低溫下,磷缺乏很可能發生,並且很可能在生長的早期發生。
(2)即使土壤中有足夠的磷酸,如果暴露於極低的溫度下,也會發生生長停滯。
(3)如果診斷出土壤且土壤中的有效磷酸鹽含量低,則磷缺乏的可能性很高。
(4)確認在水耕法中施用的磷酸量。
對策
(1)根據土壤診斷結果,如果磷酸鹽含量不足,則應施用適量的磷酸鹽肥料。
(2)施用足夠的堆肥。
(3)如果是水培栽培,請更新至合適的培養液。另外,將液體溫度控制在適當的水平。
(4)作為緊急措施,請注意不要對化學物質造成損害,例如避免高濕和高溫,並每隔一周噴灑0.3%磷酸一鉀初溶液或市售的葉面肥。
圖片來源:日本網站、以色列網站
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磷
TWD $99,999,999
TWD $99,999,999
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