介質溶液淋洗置換測定法應用於小花蕙蘭肥培管理之研究（第二報）

Effort of Pour-through Medium Solution Testing Method on the Fertilization Managemnet of Oriental Cymbidium (Secondary Report)

王茗慧(Ming-Wui Wang) ； 洪惠娟(Hui-Chuan Hung)

《臺中區農業改良場研究彙報》 117期 (2012/12) Pp. 63-71

https://doi.org/10.6956/BTDAIS.201212.0063

摘要

小花蕙蘭常因不同栽培環境及介質種類影響，至今尚無快速且方便的檢測方法，可供農友施肥調整之參考。本研究於初報時已經探討介質溶液淋洗置換法（Pour-through，簡稱PT）應用於小花蕙蘭施肥依據之可行性，本次試驗則進一步確立PT運用於小花蕙蘭之標準程序，期能進一步訂定最適合小花蕙蘭生長之PT淋洗液pH、EC值範圍，以供農友栽培應用參考。試驗材料來自臺灣南投魚池鄉，隨機選取5處蘭園進行取樣調查，以PT法分析500盆之小花蕙蘭淋洗液pH及EC值，同時進行植株樣品之生育性狀調查。由試驗結果顯示，相同蘭園及同一品種之介質淋洗液pH值在4、7及10月之間的變化不大。而介質淋洗液EC值會因施肥與否，而有明顯的差異變化，其中介質淋洗液EC值以施肥季節4及10月份較高，約為0.11至2.06 dS．M^(-1)之間，平均值約1.09±0.50 dS．M^(-1)；7月份未施肥空窗期則明顯降低，約為0.01至0.68 dS．m^(-1)之間，平均值約為0.35±0.12 dS．m^(-1)。因之，在一年期間內定期檢測介質淋洗液pH值，可視為栽培介質穩定度之重要參考。

關鍵字

蕙蘭 ； 介質溶液淋洗置換法 ； 施肥

並列摘要

The feertilization management of oriental cymbidium was varied upon cultivation condition and vatieties. The preliminary studies has indicated that it was feasibe to apply pour-through medium solution testing method (PT) on oriental cymbidium. This studies is attempted to set up a standard procedure for PT via determining an optimum range of medium EC and pH onto oriental cymbidium. Five farms with 500-pot samples from the Yuchi, Nantou, Taiwan, were randomly selected to the analysis of EC and pH of medium and the performance of plant growth characteristics. The results show that the pH value of leachate extracted from the same farms and varieties was little change among April, July and October. However, the leachate EC were variable due to fertilization. In April and October, the leachate EC is about 0.11 to 2.06 dS．m^(-1), average in 1.09 ± 0.50 dS．m^(-1); and that in nonfertilization was approximately lower in around 0.01 to 0.68 dS．m^(-1) , average in 0.35 ± 0.12 dS．m^(-1). Therefore periodic testing leachate pH with a stable value becomes crucial for the medium fertilization magement.

並列關鍵字

cymbidium ； pour-through medium solution testing method ； fertilization