Tag Archives: liming

xxx Y. Olifir, T. Partyka, O. Havryshko, H. Konyk, H. Panakhyd, N. Kozak and V. Ivaniuk
Iron content and qualitative composition in a waterlogged agricultural soil under long-term agrogenic influence, Western Ukraine
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Iron content and qualitative composition in a waterlogged agricultural soil under long-term agrogenic influence, Western Ukraine

Y. Olifir¹*, T. Partyka¹, O. Havryshko¹, H. Konyk¹, H. Panakhyd¹, N. Kozak¹ and V. Ivaniuk²

¹Institute of Agriculture of Carpathian Region of National Academy of Agrarian Sciences of Ukraine, 5, Hrushevskoho Str., UA81115 Obroshyne, Lviv region, Ukraine
²Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, 1, Volodymyra Velykoho Str., UA80381 Dublyany, Lviv region, Ukraine
*Correspondence: olifir.yura@gmail.com

Abstract:

Iron, a typomorphic element of hydromorphic and semi-hydromorphic soils, significantly influences soil formation processes. Despite being relatively well studied, there is a lack of data on the content of its mobile compounds in Albic Pantostagnic Luvisol. Therefore, the study’s main objective is to determine the amount, profile distribution, and seasonal dynamics of Fe compounds in a waterlogged agricultural soil subjected to different levels of long-term anthropogenic influence. Research conducted in a long-term stationary experiment shows that the composition of mobile forms of iron in Albic Pantostagnic Luvisol is dominated by the oxide form Fe3+. The highest Fe3+ content (160.6 mg kg-1) was found in the humus-eluvial layer of the control soil without fertilizer, while Fe2+ compounds reached 46.6 mg kg-1 at рНKCl 4.30. Long-term application of an organo-mineral fertilization system combined with liming by hydrolytic acidity reduced the content of mobile iron compounds to 128.0 mg kg-1, of which Fe2+ accounted for 12.64 mg kg-1 at рНKCl 5.45. Under an identical fertilization system with liming by pH buffering capacity, the Fe2+ content was 28.0 mg kg-1, with a total content of 118.0 mg kg-1 and рНKCl of 5.54. In the natural conditions of forest and fallow land, the highest contents of mobile iron were 231.7 and 383.1 mg kg-1 in the 0–20 cm horizon with a significant predominance of Fe3+ compounds, 210.1 and 366.3 mg kg-1, respectively.

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xxx W.B.S. Santos, F.F. Silva, T.M. Neto, I.C. Dutra, J.F. Muricy, C.J. Santos, A.J.V. Pires, G.C. Dutra, M.S. Nogueira, G.R.S. Oliveira, R.B. Mendes and D.C. Jesus
Liquid lime and conventional agricultural lime in soil acidity correction and characteristics of Brachiaria brizantha cv. Braúna
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Liquid lime and conventional agricultural lime in soil acidity correction and characteristics of Brachiaria brizantha cv. Braúna

W.B.S. Santos, F.F. Silva, T.M. Neto, I.C. Dutra*, J.F. Muricy, C.J. Santos, A.J.V. Pires, G.C. Dutra, M.S. Nogueira, G.R.S. Oliveira, R.B. Mendes and D.C. Jesus

State University of Southwest of Bahia, BR45700-000 Itapetinga, Bahia, Brazil
*Correspondence: ingriidyduutra@gmail.com

Abstract:

The effect of applying liquid limestone and conventional limestone together with regrowth in correcting soil acidity and characteristics of Brachiaria brizantha cv. Braúna was evaluated. The treatments were randomly distributed in a 3×3 factorial scheme, with three soil corrections: 1) control; 2) conventional limestone; 3) liquid limestone and three regrowths with a cutting interval of 21 days at 10 cm from the soil, with 4 replicates. The soil pH and base saturation were evaluated in each regrowth in the 0 to 20 cm layer, in addition to the production and bromatological characteristics of Braúna grass. Conventional limestone was efficient in increasing the pH, saturation and production of root dry matter. There was a regrowth effect, where there was an increase in the levels of dry matter, NDF, ADF, hemicellulose and cellulose, and a reduction in the levels of crude protein. The use of conventional limestone is recommended to correct acidity and increase base saturation, as there is greater root development. Brachiaria brizantha cv. Braúna is influenced by regrowth at successive cutting intervals of 21 days, with reduced productivity at each cut and reduced crude protein content.

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1627-1639 Y. Olifir, A. Нabryel, T. Partyka, O. Havryshko and H. Konyk
Diagnosis of the functional state of transformed acid soils agroecosystems depending on long-term anthropogenic loads
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Diagnosis of the functional state of transformed acid soils agroecosystems depending on long-term anthropogenic loads

Y. Olifir*, A. Нabryel, T. Partyka, O. Havryshko and H. Konyk

Institute of Agriculture of Carpathian region NAAS, 5, Hrushevskoho Str., UA81115 Obroshyne, Pustomyty district, Lviv region, Ukraine

Abstract:

The main priority of agro industrial production has always been and remains to provide
the global population and its yearly increments with food food. The issue of soil fertility improvement is still the most important task of agricultural science. The assessment of the agroecological condition of Albic Stagnic Luvisol using carbon dioxide emission, redox potential, and biotic activity was carried out, based on modern methodological approaches, such as soil quality evaluation via ecologically-related biological parameters. Carbone dioxide emission, redox, and biological processes in long-term stationary experiment depend on the degree of soil acidity reduction. Soil acidification can be minimized through chemical melioration with the combined application of different doses of mineral fertilizers and manure. It was found that carbon dioxide emission is optimal in an organo-mineral fertilizing system with application of 10 t of manure per 1 ha and N65Р68K68 with lime dose (2.5 t ha-1) calculated according to pH buffering capacity. It is due to oxidative and moderately oxidative conditions created. This organo-mineral fertilizing system also increases the number of aerobic bacteria and overall biological activity. The mineral fertilization and the use of Albic Stagnic Luvisol without fertilizers are accompanied by increased mineralization, growth of reductive processes, and the number of moulds. Studies have shown that it is advisable to include CO2 emission, redox potential and biological activity along with physicochemical and agrochemical soil properties to assess the influence of different anthropogenic loads on soil formation.

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415-420 V. Loide
Relieving the calcium deficiency of field soils by means of liming
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Relieving the calcium deficiency of field soils by means of liming

V. Loide

Estonian Research Institute of Agriculture, Teaduse 11, Saku 75501, Estonia;e-mail: valli.loide@mail.ee

Abstract:

Over 22% of Estonian field soils are calcium-deficient and acidificated, and are also among the poorest soils in Estonia in terms of humus; their average humus content remains below 2%. Low humus content in calcium-deficient soils results from either, a lesser generation of organic matter on acid soil, or its decomposition speed as affected by the micro fungi, which are dominant in calcium-deficient (Haplic Podzoluvisols) soils. The dissolved organic matter succumbs easily to leaching and transport caused by wind and water (erosion), whereby the fertility of the soil will decline. Thus, calcium plays an important role in ensuring the fertility and sustainability of soil; liming is used to relieve its deficiency. To eliminate calcium-deficiency in field soils, the quick-acting fine dusty limes with 5-year interval 5 t ha-1 are mainly used in Estonia. Paying attention to the dynamics of available calcium content in the soil limed with fine dusty lime fertilisers, it appeared that the calcium content remained at the optimum level in the ploughed layer for only 2–3 years, a considerably shorter period of time than expected. Since the level of fineness determines its ability to dissolve and the effect of lime on the available calcium content in soil, then to improve the effectiveness of liming and, from the aspect of an economical use of resources, it is advisable to use dusty limes with a shorter than 5-year interval and, respectively, in smaller quantities, which would guarantee a more stable calcium content in the soil with a better use of resources. For longer effect, limestone should sufficiently contain a coarser fraction, dissolving only in the 3rd–4th year.

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