長期施用台肥5號複合肥料對柑桔果實品質及產量之影響

The Orange Yield and Quality as Affected by Long Time to Use No.5 Compound Fertilizer

莊浚釗(Chun-Chao Chuang)

《桃園區農業改良場研究報告》 8期 (1991/09) Pp. 15-29

摘要

為探討柑桔施肥量對果實品質及產量之影響，在苗栗縣卓蘭鎮柑桔專業區內，以台肥五號複合肥料（16－8－12）之不同施用量，辦理自72年至82年之長期試驗。根據8年之試驗結果顯示，以每株施用台肥五號3公斤區平均產量最低（55.9公斤），而6、9及12公斤區產量分別為63.1公斤、62.4公斤及58.4公斤，分別增產13%、12%及4%，顯示柑桔肥料施用量至每株6公斤以上時，產量並未因施肥量增加而增加，反有減少的趨勢。收穫後土壤中有效性磷酐及氧化鉀含量隨施肥量之增加而增加，其餘pH、有機質之含量則未增加；葉片養分濃度大多亦隨施肥量之增加而有增高趨勢，其中葉片氮素含量屬於高等，磷、鉀、鎂含量則屬適中範圍，鈣則低等居多。另不同施肥量對品質影響，尚無明顯差異。

並列摘要

The experiment was conducted in Cholan, Miaoli Hsien to study the effect of different rates of compound fertilizer of No.5 on the quality and yield of orange. The results are summalized as following: Application of 3 kg /plant of compound fertilizer of No.5 resulted in the lowest yield (55.9 kg /plant) among treatments. However, the yields of treatments 6, 9 and 12 kg /plant were 63.1 kg, 62.4 kg and 58.4 kg, with increasing yield of 13%, 12% and 4%, respecitively.The results indicated that the yield would decrease when fertilizer was applied over 6 kg /plant. After harvest, the concentration of available phosphorus and exchangeable potassium (K2O) in soil was increased with increasing of fertilizer applied. Whereas, pH, O.M in soil and the element applied concentrations in leaf was increase. The concentration of nitrogen in leaf was high: Phosphorus, potassium and magnesium were middle; and cadium was low. Effect of different rates of compound fertilizers on the quality of orange was no significant.