香草兰营养特性的研究

对海南不同生产水平的香草兰种植园植株的养分调查分析，及Ｎ，Ｐ，Ｋ，Ｃａ，Ｍｇ肥料的盆栽试验，研究香草兰的营养特性。结果表明，香草兰植株养分的吸收量以Ｋ〉Ｃａ〉Ｎ〉Ｍｇ〉Ｐ，叶片以Ｃａ〉Ｋ〉Ｎ〉Ｍｇ〉Ｐ；结果植株养分吸收量Ｎ：Ｐ：Ｋ：Ｃａ：Ｍｇ＝１．００：０．２４，１．３９：１．１８：０．４８，盆栽幼苗Ｎ：Ｐ：Ｋ：Ｃａ：Ｍｇ＝１．００：０．１０：１．３８：１．２３：０．３３；高产园植株Ｃａ，Ｐ含量极

Nutritive Characteristics of Vanilla

Nutritive characteristics of vanilla were studied through analyzing nutritional conditions of the different organs of vanilla vines in high-or low-yielding vanilla plantations distributed in Hainan and in pot experiments with N,P,K,Ca,Mg fertilizers. Results revealed that the nutrient uptake by vanilla vines was in the order of K>Ca>N>Mg>P and by leaves Ca>K>N>Mg>P. The ratio of nutrient uptake by fruit -bearing vanilla vines was N: P: K: Ca: Mg=1: 0. 24: 1.39: 1.18: 0. 48,and by pot cultured young vines N: P: K: Ca: Mg=1:0. 10:1.38: 1.23: 0.33. High -yielding vanilla vines contained noticeably higher P and Ca in leaves than low-yielding vanilla vines. The pot fertilizer experiment disclosed evident effect of Ca and P on vanilla growth and variation of the nutrient content in vanilla leaves under different foliar positions and growth seasons.