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    Effects of Irrigation and Fertilization at the Stage of Flower-bud Differentiation of Pineapples

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    為探討鳳梨在花芽分化前後之施肥及灌水,對於鳳梨果實大小及量之影響,以供栽培管理之參考,1962年4月至1963年8月在鳳山熱帶園藝試驗分所舉辦本試驗結果摘要如下: 1.秋果在花芽分化前後之灌水,效果不顯著(試驗地在坦旱田,土壤水分含量較高)在花芽分前60天至分化後15天施肥者,效應顯著,可增加小果數3~12%,增加果重12~22%。 2.春果花芽分化前後,為雨季末期,土壤含水量足供鳳梨之需要,灌水無效。花芽分化前15~45天之肥增加小果數約2~10%,花芽分化後之施肥小果數無增,但在花芽分化前45天內之施肥,均可提高果重達6~12%。 3.夏果在花芽分化前或分化中施肥及灌水,均可增加小果數達11~41%,而以施肥後並行灌水者其效果最大,尤在花芽分化前30~45天之施肥'肥效最佳。施肥及灌水日期遲,效果愈低。 The studies reported in this paper were made to ditermine the effects of irrigation and fertilization at the stage of flower-bud differentiation of pineapples at Fang Shan Troprcal Horticulture Experimental Station from April 1962 through August 19 63. Results of t his experiment are summarized as follows: 1). For autumn-fruits, irrigation just before or after the flower-bud differentiation, no significant difference have been made; while in fertilization, 2-3 per cent fruitlet and 12-23 per cent of fruit weight were increased when fertilized a t the interval 60-day before to 15-day after the f lower-bud differentiation. 2). For spring, fruits, due to the abundant of soil miosture cqntent, no effect of irrigation have :been made. The time of flower-bud differentiation is just in the end of the monsoon season at Fang Shan area. In fertilization treatment, 2- 10 per cent of fruitlet was increased when fertilized 15-45-day before the flower bud-differentiation, but no effect have been made afterward. Fertilization during 45-day before or after the flower-bud-differentiation, 6-12 per eent of fruit weight was increased. 3). For summer fruits, fertilization and irrigation before or just in the flower-bud differentiation, 11-14 per cent of fruitlet was increased. The effect of fertilization is higher than that of irrigation, especially when fertilized at 30-45 days before the flower-bud differentiation. The . later the fertilization and irrigation the lesser the effects were observed

    Correspondence to Mary Ann Smith From William H. Borders and C.M. Lowe, March 22, 1961

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    Correspondence from William H. Borders and C.M. Lowe to Mary Ann Smith notifying her of a meeting for the Atlanta Student Adult Liaison. 1 page
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