Seasonal Changes of Nitrogen, Phosphorus and Potassium Contents in Leaves and Terminal Shoots of Mango (Mangifera indica L.) var. 'Nam Dokmai'

บทคัดย่อ

The variations of nitrogen, phosphorus and potassium contents in leaves and terminal shoots of mango (Mangifera indica L.) var 'Nam Dok Mai' were studied in every 28 days interval at Pakchong Research Station, Kasetsart University, Changwat Nakhon Ratchasirna during 1978-1979. Nitrogen and phosphorus contents in leaves and terminal shoots were high before flowering and low during flowering and fruit growth periods. The levels of nitrogen and phosphorus decreased with the increase in age of leaves and terminal shoots. The changes of potassium content in leaves and terminal shoots did not relate to any particular pattern.