盆菊栽培介質pH值適宜性評估

Assessment of Optimum pH Value of Growth Media for Potted Chrysanthemum

羅秋雄(Chiu-Shyoung Lo) ； 王斐能(Fei-Neny Wang)

《桃園區農業改良場研究彙報》 42期 (2000/09) Pp. 37-48

https://doi.org/10.29567/ZHWHGX.200009.0004

摘要

本研究主要目的在評估盆菊栽培介質適宜的pH值，供為調配介質之依據。以腐熟米糠榖殼堆肥（米糠：粉碎榖殼：金針菇木屑=2：4：4 (v/v)混合堆積腐熟）：河砂=3：1比例混拌為栽培介質，並以HC1及Ca(OH)2溶液，實際調整pH值為4.7、5.0、5.4、6.1、6.4、6.5、6.9、7.3及7.6之栽培介質。試驗結果顯示；栽培介質有效性養分含量受pH值影響甚巨，氮含量隨pH值昇高而下降，磷、鈣及鎂含量則隨pH值昇高而增加，鉀含量在pH 5.0－7.0時較高。植體養分吸收量除鈣有隨pH昇高而增加之趨勢外，氮、磷、鉀及鎂均以pH在5.4－6.5之間吸收量較高。就pH對盆菊性狀影響而言；栽培介質pH值在5.0－6.5之間，株高、花朵數、花乾重及植體乾重均有較佳的表現，迴歸分析結果均達顯著或極顯著差異，pH值高於6.5或低於5.0盆菊生育均受影響。

關鍵字

盆菊 ； 栽培介質 ； pH值 ； 養分 ； 植體生長

並列摘要

The experiment was conducted at Taoyuan Hsinwu from 1998 to 1999 to determine the optimum pH value of growth medium for potted chrysanthemum.The growth medium was made by mixing rice bran, rice hull and mushroom refuse at the rate of 2:4:4(v/v), and then mixed with sand at 3:1(v/v) proportions. The solution of HCl or Ca(OH)2 were added to the medium, and the pH value was adjusted to 4.7, 5.0, 5.4, 6.1, 6.4, 6.5, 6.9, 7.3 and 7.6.The results of the experiment showed that the pH value could significantly affect the available nutrient contents of the growth medium, the content of N decreased with the increasing of pH value, the content of P, Ca and Mg increased with the increasing in pH value, and higher content of K appeared at a pH value 5.0-7.0. Measurement of the nutrient uptake in the plants has shown that Ca was increased with an increasing of pH value, but higher contents of N, P, K and Mg were found at the pH value 5.4-6.5.In terms of chrysanthemum growth characters the optimum pH value for plant height, number of flower, dry flower weight and dry plant weight was found at 5.0-6.5, while the growth of plant would be retarded when pH value was above 6.5 or below 5.0.

並列關鍵字

Potted chrysanthemum growth media ； pH value of medium