不同成熟度椰子叶片N、P、K含量及其变化规律

Content and Changeable Rule of N,P,K in Different Mature Leaves of Coconut

以本地椰子、香水椰子和小黄椰的不同成熟度叶片为材料,研究了3个椰子品种的N、P、K含量及其变化规律。结果表明:椰子叶片中3种养分含量从大到小依次为N>K>P;不同成熟度的叶片N、P、K含量存在显著差异(P<0.05),3个椰子品种中N、P、K含量的变化趋势基本相同,在成熟叶后均随着叶片成熟度的增加而呈下降趋势;N、K含量在3个椰子品种间存在显著差异,但P含量差异不显著。

The changeable rule of N,P,K content in different mature leaves of local coconut,aromatic coconut and small yellow coconut was studied.The results showed that the content of these three nutrients in coconut leaf had the following order： N＆gt;K＆gt;P;the content of N,P,K showed remarkable difference（P＆lt;0.05） among different mature leaves;the content of N,P and K had similar changeable trend in three coconut cultivars,namely they all showed downtrend as the mature degree of the leaves increased after maturing of the leaves ; there was significant difference in N and K content （ P 〈 0. 05 ） among three coconut cultivars, but there was no significant difference in the content of P.