Articles
THE EFFECT OF MONOCULTURE AND POTATO FERTILIZATION ON CHEMICAL CHANGES IN SOIL
Article number
462_40
Pages
281 – 284
Language
Abstract
In order to examine the influence of mineral fertilizers and manure on chemical changes in the soil, we tested certain soil samples and an open field where we grew potatoes in monoculture.
The effect of mineral fertilizers and manure on chemical changes in absorbing pseudoclay complex was studied.
This examination started in the spring of 1966 in the examination field at Kaona, of the Potato Research Center in Guca.
After 20 years of growing and fertilizing potatoes in monoculture, samples of soil were taken for laboratory research after the crop in the autumn of 1966. Samples, up to the depth of 20 cm., were taken according to variations of fertilization.
The samples were as follows: 1. Control (untreated); 2. Manure 30t/ha; 3. Manure and mineral fertilizer (50% : 50%); 4. Mineral fertilizer.
The following results were obtained: the decrease of active and substitutional acidity under the influence of manure was insignificant.
Values of pH water and NKCI were raised by 0.10 (i.e., 0.35 pH units). Fertilization with manure in combination with mineral fertilizer (var.3) increased the content of humus by 0.32% and reduced pH values in water and NKC1 by 0.48 (i.e., 0.30 pH units). The application of only mineral fertilizer in the monoculture of potatoes significantly influenced chemical changes of the soil so that acidity of the soil increased.
Values of pH in H2O were 0.55 less, and in NKCl 0.35 pH units.
Manure reduced hydrolytic acidity (Y1) by 7.21%, and the manure-mineral fertilizer combination, as well as the variant with mineral fertilizers only, led to the increase by 34.95% and 38.58%, respectively.
Mineral fertilizer increased T – S (H) by 113.13%, whereas manure and mineral fertilizer applied together made an increase by 107.52%. The sum of the basis (S) was decreased in the variants 3 and 4 by 11.19% and 21.51%, respectively.
The degree of basis saturation (V%) decreased by 9.97 – 31.38% in all the variants.
The decrease (by 69.33%) in the amount of changeable Al was observed when manure was applied, whereas mineral fertilizer increased it considerably (by 206.72%). Manure applied in the combination with mineral fertilizer also increased Al content (84.87%) in comparison to the control group.
The effect of mineral fertilizers and manure on chemical changes in absorbing pseudoclay complex was studied.
This examination started in the spring of 1966 in the examination field at Kaona, of the Potato Research Center in Guca.
After 20 years of growing and fertilizing potatoes in monoculture, samples of soil were taken for laboratory research after the crop in the autumn of 1966. Samples, up to the depth of 20 cm., were taken according to variations of fertilization.
The samples were as follows: 1. Control (untreated); 2. Manure 30t/ha; 3. Manure and mineral fertilizer (50% : 50%); 4. Mineral fertilizer.
The following results were obtained: the decrease of active and substitutional acidity under the influence of manure was insignificant.
Values of pH water and NKCI were raised by 0.10 (i.e., 0.35 pH units). Fertilization with manure in combination with mineral fertilizer (var.3) increased the content of humus by 0.32% and reduced pH values in water and NKC1 by 0.48 (i.e., 0.30 pH units). The application of only mineral fertilizer in the monoculture of potatoes significantly influenced chemical changes of the soil so that acidity of the soil increased.
Values of pH in H2O were 0.55 less, and in NKCl 0.35 pH units.
Manure reduced hydrolytic acidity (Y1) by 7.21%, and the manure-mineral fertilizer combination, as well as the variant with mineral fertilizers only, led to the increase by 34.95% and 38.58%, respectively.
Mineral fertilizer increased T – S (H) by 113.13%, whereas manure and mineral fertilizer applied together made an increase by 107.52%. The sum of the basis (S) was decreased in the variants 3 and 4 by 11.19% and 21.51%, respectively.
The degree of basis saturation (V%) decreased by 9.97 – 31.38% in all the variants.
The decrease (by 69.33%) in the amount of changeable Al was observed when manure was applied, whereas mineral fertilizer increased it considerably (by 206.72%). Manure applied in the combination with mineral fertilizer also increased Al content (84.87%) in comparison to the control group.
Publication
Authors
B. Stoiljkovic, R. Dimitrijevic, S. Babic, S. Šušic
Keywords
pseudoclay, adsorbing complex, hydrolytic acidity, basis saturation
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