Response of the application of slow-release potassium fertilizer using natural zeolite to flue-cured tobacco (Nicotiana tabacum L.).
1989
Lee D.H. | Choi J. | Park S.J.
For development of slow releasing K-fertilizer using natural zeolite, two kinds of K adsorbed zeolite were made by ion exchange reaction in K** (+) saturated aqueous solution. K-Zeolite was prepared by removing the excess salt after K adsorption on zeolite, however, NW. K-Zeolit was prepared only by K adsorption reaction without removing the excess salt. The adsorbed K on zeolite was not easily released, but continuously and slowly released from the surface of zeolite. By the results of application for tobacco cultivation, the K contents in soil treated with K-Zeolite and NW. K-Zeolite were lower than that of control (20 Kg/10a) at the early growth stage, but were higher at the late growth stage. Therefore, the results suggest that K adsorbed zeolite could be applied as a slow-releasing K fertilizer.
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