腐植酸及磷、鉀肥對枇杷品質及產量之影響

Effects of Humic Acid and P, K Fertilizers on the Quality and Yield of Loquat

蔡宜峰(Y. F. Tsai) ； 黃祥慶(H. C. Huang) ； 賴文龍(W. L. Lay)

《臺中區農業改良場研究彙報》 24期 (1989/09) Pp. 45-52

https://doi.org/10.6956/BTDAIS.198909.0045

摘要

在台中縣新社鄉屬於紅壤地區之枇杷果園實施腐植酸配合磷及鉀肥不同用量之試驗。結果顯示，施用腐植酸有助於改良0～40cm土壤剖面之總體密度及土壤硬度等土壤物理特性，並增加土壤中磷、鉀、鈣、鎂及硝酸態氮的含量及其有效性，但對於較底層土壤（40cm以下）則無明顯影響。腐植酸處理亦略有增加枇杷產量及果實糖度的效果。在磷、鉀肥不同用量處理上，磷肥用量增加可以提高枇杷果實糖度，鉀肥對果實品質之影響不明確，惟與枇杷產量有顯著正相關性。綜合枇杷產量、果實糖度及糖酸比之考量，以P2O5及K2O分別為300及450kg/ha之處理較佳。

並列摘要

This field experiment was conducted with humic acid, P and K fertilizers at a loquat orchard of red soil in Hsinshe, Taichung. The results showed that the application of humic acid reduced soil bulk density and hardness, and increased the availableness of P, K, Ca, Mg and nitrate contents in soil profile from 0-40 cm, but no difference down from 40 cm. The application of humic acid also increased the yield and sugar contents of loquat. Furthermore, the sugar contents of fruit was increased significantly by the application of P fertilizer. The yield of loquat was closely related to K fertilizer, and no relationship between fruit quality with K fertilizer. As far as both P and K fertilizers were concerned, treated with 300 kg/ha P2O5 and 450 kg/ha K2O, the maximum yield and quality of loquat could be obtained.