氮磷钾配施对四季桂秋季开花和养分积累的影响

为了研究不同氮磷钾配施对四季桂秋季生长、营养物质积累及产花量的影响,本试验以盆栽四季桂品种‘金玉台阁’(Osmanthus fragrans‘Jinyutaige’ )为试材,采用“3414”不完全正交回归试验设计。结果表明：适量增施氮、磷、钾肥均可显著提高四季桂产花量、花梗、花径、新梢生长、叶面积和可溶性糖、可溶性蛋白的含量。高氮中等磷钾肥N3P2K2(N 3g/盆,P 3g/盆,K 1.5g/盆)处理下新梢长度、粗度和叶面积最大；中等磷钾肥N2P2K2(N 3g/盆,P 3g/盆,K 1g/盆)处理下,四季桂叶片积累了更多的可溶性糖和可溶性蛋白等营养物质,从而得到更多的产花量,花梗最长,花径也最大。

Different Types of Fertilization Formula Affecting Autumnal Flowering and Nutrient Accumulation of Osmanthus fragrans

To study the effects of N, P and K formulated fertilization on autumnal growth, nutrient accumulation and flower output of Osmanthus fragrans, this experiment took potted O. fragrans‘Jinyutaige’as material and adopted‘3414’incomplete regression-orthogonal design. The results showed that, flower output, peduncle length, flower diameter size, new shoot growth, leaf area, soluble sugar, soluble protein were significantly increased by moderately increasing use of N, P and K formulated fertilization. The new shoot length, roughness and leaf area reached the biggest under the treatment of higher N level and medium P and K level, namely, N3P2K2(N 3 g/pot, P 3 g/pot, K 1.5 g/pot); while soluble sugar, soluble protein, the amount of flowers, peduncle length, flower diameter size were the largest under the treatment of medium N, P and K level,namely, N2P2K2 (N 3 g/pot, P 3 g/pot, K 1 g/pot).