An Investigation on The Zinc Status of The Soils of Great Konya Basin and the Selection of the Most Suitable Methods for The Estimation of Plant Available Zinc in The Soils

Authors : Sait Gezgin, Fethi Bayraklı

Pages : 63-78

View : 7 | Download : 17

Publication Date : 1993-12-15

Article Type : Research Paper

Abstract :The objective of this study was to find out the zinc status of the soils of great Konya basin and to select the most suitable chemical extraction method or methods for determining the plant available zinc in the soils. For that purpose; a greenhouse experiment was conducted and corn was grown as a test plant. Thereby, Six different biological index values were obtained. On the other hand, available zinc status of the soils were determined by some chemical extraction methods and the results obtained by this way were compared with biological index values statistically. According to the significances of the correlation coefficients betwen the methods and biological index values the efficiency of thirteen Zn extractants in the assessment of available soil zinc was arranged as follow: 0.005 M DTPA + 0.01 M CaCl2 + 0.1 M TEA> IN NH4OAc (pH = 4.8) > 5N CH3COOH>0.01 N Na₂EDTA + 1N NH4OAC > 0.01 M Na₂EDTA + 1M (NH4)2CO3 > 0.01 N Na₂EDTA > 1 N NH4OAC (pH = 3.0). Among those thirteen extractants it was found a highly significant correlation (r = 1.00) between the seven methods. Thereby, one of these seven methods could be proposed to determine the plant available zinc content of the soils. Since the choice of method will depend upon the correlation with plant response, equipment, facilities available and it\\\'s ability to solve the other plant available elements, such as Fe, Mn and Cu the method of DTPA + CaCl2 + TEA was suggested as the best measure for assessing availability of zinc in these soils.
Keywords : KONYA HAVZASI, ÇİNKO, KİMYASAL