文旦柚缺鎂土壤改良方法之研究

Soil Improvement of Magnesium Deficiency for Wentan Pomelo

10.6957/RBHDAIS.199606.0040

林素禎(Suh-Jen Lin)；鄭仲(Chung Cheng)

文旦柚 ； 缺鎂 ； 土壤改良 ； Wentan pomelo ； Magnesium deficiency ； Soil improvement

花蓮區農業改良場研究彙報

12期（1996 / 06 / 01）

40 - 47

繁體中文

為了提高苦土石灰改良強酸性土壤缺鎂的效果，本試驗乃利用立體施肥機深施苦土石灰，期使深層土壤與苦土石灰充分混合。試驗地點在花蓮縣瑞穗鄉。試驗土壤為強酸性壤土。民國八十年在文旦柚果實採收後，進行六種試驗處理。六種試驗處理為（1）不施苦土石灰，（2）撒施苦土石灰，（3）溝施苦土石灰，（4）深施苦土石灰，（5）溝施苦土石灰並添加樹皮堆肥，以及（6）深施苦土石灰並添加樹皮堆肥。民國八十一年與八十二年，在八、九月間，分析土壤性質、葉片鎂含量以及文旦柚果實品質，並調查文旦柚果實產量。由分析調查結果得知，以立體施肥機深施苦土石灰，不論是否添加樹皮堆肥，皆可有效的提高土壤0～60cm深的鈣、鎂含量以及pH值，且深層施用苦土石灰之處理，其文旦柚果實產量最高，但各處理間文旦柚葉片鎂含量及文旦柚果實品質無明顯差異。

The main purpose of this experiment is to enhance the efficiency of Magnesium containing lime and the availability of Magnesium application in cooperating with a driller designed for deep fertilization. The experiment was conducted at Jui-Sui, Hualien. The soil studied is strong acid loam. In 1991, after the harvest, six treatments, i.e.,(1)control,(2)laying lime on the ground,(3)lime applied in the furrows,(4)deep fertilizer application by a driller,(5)furrow liming and amended with the bark compost, (6) deep fertilizer application with the bark compost. Between August and September of 1992 and 1993, soil properties, Mg contents in leaves and fruit quality of wentan pomelo were analyzed. Meanwhile, the production of wentan pomelo was also recorded. Result showed that, the operation of a driller designed for deep fertilizer application has been significatly promoted the strong acid soil to be neutralized to attain a desired soil pH, and also the contents of Mg and Ca in leaves at the depth of 0-60 cm. Besides, the fruit productions were also promoted to the highest among the treatments. However, the contents of Mg in leaves and the fruit quality were not significantly different.