The content of mobile aluminium compounds depending on the long-term use of various fertilizing and liming systems of Albic Pantostagnic Luvisol

Y. Olifir¹*, A. Нabryel¹, T. Partyka¹, O. Havryshko¹, N. Kozak¹ and V. Lykhochvor²

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

Abstract:

Today, climate change is exacerbating the problems of efficient and environmentally friendly use of acidic soils, which are widespread in Ukraine. At the same time, the role of mobile aluminium compounds in acidity formation is also becoming increasingly important. In this regard, chemical amelioration remains a primary and very important factor in the system of resource-saving and environmentally friendly agricultural measures for the efficient and balanced use of acidic soils. Therefore, the main objective of the research is to establish scientifically sound doses of chemical ameliorant that reduce the content of mobile aluminium compounds and ensure environmental safety and high productivity of agrocenoses on Albic Pantostagnic Luvisol. The research was carried out in a long-term stationary experiment established in 1965 with different doses of mineral fertilisers, manure and lime on an Albic Stagnic Luvisol. It was found that with a prolonged application of mineral fertilisers and the use of this soil without fertilisers, the content of mobile aluminium compounds at the end of the X rotation at pH_KCl 4.20 and 4.42 was 68.4 and 58.5 mg kg^-1 respectively. Under the organo-mineral and mineral fertilisation systems with liming with 6.0 t ha^-1 of CaCO₃ calculated by hydrolytic acidity, the content of mobile aluminium compounds decreased to 7.2 and 6.7 mg kg^-1 of soil respectively. Under identical fertilisation systems with a lime application by pH-buffering capacity (2.5 t ha^-1 CaCO₃), the content of mobile aluminium compounds is 10.8–10.0 mg kg^-1 soil.

Key words:

acidity, Albic Pantostagnic Luvisol, aluminium, fertilizers

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.

Key words: