CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.
El-Hedek, K., El-Kholy, M., El-Tohamy, S. (2014). CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.. EKB Journal Management System, 5(9), 1247-1268. doi: 10.21608/jssae.2014.49645
K.S. El-Hedek; M.M. El-Kholy; S. A. El-Tohamy. "CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.". EKB Journal Management System, 5, 9, 2014, 1247-1268. doi: 10.21608/jssae.2014.49645
El-Hedek, K., El-Kholy, M., El-Tohamy, S. (2014). 'CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.', EKB Journal Management System, 5(9), pp. 1247-1268. doi: 10.21608/jssae.2014.49645
El-Hedek, K., El-Kholy, M., El-Tohamy, S. CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.. EKB Journal Management System, 2014; 5(9): 1247-1268. doi: 10.21608/jssae.2014.49645

CHANGES IN FRACTIONS OF SOME MICRONUTRIENTS AS AFFECTED BY CONTINUOUS CROPPING AND LONG-TERM APPLICATION OF MINERAL AND ORGANIC FERTILIZER.

Journal of Soil Sciences and Agricultural Engineering
Article 4, Volume 5, Issue 9, September 2014, Page 1247-1268  XML PDF (767.38 K)
Document Type: Original Article
DOI: 10.21608/jssae.2014.49645
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Authors
K.S. El-Hedek1; M.M. El-Kholy2; S. A. El-Tohamy2
1Soils, water and Environment Res. Inst., ARC, Cairo, Egypt.
2Soils, water and Environment Res. Inst., ARC, Cairo, Egypt
Abstract
Soil samples were collected from on-going long-term experiment at Bahtim area, Kalubia Governorate, Egypt, to study the distribution of various forms of iron, manganese, zinc and copper. The optimum dose-based treatments selected for the study were N(15kg/ fed), N(15kg/fed)-P, N(15kg/ fed)-P-K,N(30kg/fed),N(30kg/fed)-P,N(30kg/fed)-P-K,N(60kg/fed), N(60kg/fed)-P, N(60kg/ fed)-P-K, organic (FYM), and control (no fertilizer or manure). Differnet fractions of Fe, Mn, Zn and Cu in the soil were sequentially extracted using different extractants. DTPA- extractable Fe, Mn, Zn and Cu in soil increased in all treatments compared to control as a result of continuous cropping and fertilizer application. The amount of Fe, Mn, Zn and Cu in different fractions revealed the following order: exchangeable ˂ organically bound  ˂ manganese oxides ˂ crystalline iron oxides ˂ amorphous iron oxides˂ residual. DTPA-Fe showed significant correlations  with all Fe fractions except manganese oxides-Fe. DTPA- Mn showed significant correlations with all Mn fractions except crystalline iron oxides- Mn. DTPA- Zn showed significant correlation with all fractions of  Zn except both exchangeable and organic matter- Zn. As for, DTPA- Cu results showed a significant correlation only with organic matter- Cu.
Keywords
fractions of Fe; Mn; Zn and Cu; long-term experiment; sequential extraction
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