肥料及植物荷爾蒙Anaton 98對於鳳梨赤色病發生之影響

The Effects of Fertilizers and Plant Hormone Anaton 98 on the Outbreak of Pineapple Pink Disease

本試驗之鳳梨於民國六十一年九月栽植，於六十二年九月五日得電石處理促進春果抽穗，電石處理後十日施用NPK三要素，硫酸銨及尿素等三種肥料處理，並於果實花紋謝後四十日噴施Anaton 100, 150, 200ppm，各種不同濃度之荷爾蒙（Anaton 98）每果20ml。各種肥料處理對赤色病之發生，以施用單氮區有較多之傾向，即三要素區最少，碳酸銨區次之，尿素區最多，但差異不顯著。荷爾蒙處理對赤色病之發生甚為顯著，濃度愈濃發生率愈多，而噴施荷爾蒙區與不噴對照區相比，赤色病增加24~4.6倍之多。罹致果實多係肉聲果，惟鳳梨噴施荷爾蒙確可增加肉聲果，因此赤色病變顯著增加。其次噴施荷爾蒙愈濃其果實之糖度愈低，但肥料處理間無多大差異，酸度則以肥料三要素區顯著較高，荷爾蒙處理間之酸度有較對照區為低之趨勢，但不顯著。

The pineapples used for this experiment were planted in September 1971. The carbide solution-used to promote the flower-differentiation was applied on 5 September 1973. Three fertilizer treatments including NPK, ammonium sulphate and urea were applied ten days after treating the carbide solution. Beside, 100, 150, 200 ppm growth hormone-Anaton 98 were sprayed respectively in the amount of 20ml per, fruit 40 days after flowering. Results indicated significantly that the pink disease was more serious in the higher concentration of growth hormone. There was a tendency that high nitrogen application induced pink disease to the fruits. When comprison with the hormone-application effect with reference to pink disease, it indicated that the occurrence in applied plot was 2.4-4.6 times higher than the control plot. Most of the infested fruits reflected flesh-sound which were favorable for the fresh fruit market. The fruits which treated with growth hormone showed that the higher concentration applied the lower sugar content but there was no difference of sager content between the feritlizer treatments. As to the fruit acidity with relation to the fertilizers or growth hormone, applications it was revealed that a significant higher acid content in NPK treatment and a statistically insignificant lower acid content in the hormone treatments than the check.