The dynamics of soil fertility of arable lands in goshcha district of rivne region
Journal Title: Біоресурси і природокористування [Biological Resources and Nature Management] - Year 2018, Vol 10, Issue 1
Abstract
According to agrochemical researches and field experiments of scientific institutions, the change of maintenance of humus, nutrients and reaction of soil solution that leads to agrochemical degradation is observed due to high-intensity uses of land resources, scientifically unreasonable system of agriculture. Objective - study of dynamics of soils’ fertility indexes of arable lands of Goshcha district of Rivne region is based on the results of the last 5 rounds of agrochemical certification of agricultural lands (1996-2016). Methods: analytical, method of comparison and calculation, and statistical. Complex agrochemical assessment of soils was carried out on a 100-mark scale in comparison with reference indicators. It is established that the content of humus in 0-20 cm layer of soils of arable lands in the area during 2001- 2016 was 2,58-2,26% that indicates a constant tendency to decrease. For the last 20 years (1996-2016) the tendency to decrease in the weighted average indicator from 6,3 in VII round to 6,0 in X round and to increase from 6,0 to 6,3 units of рНKCℓ during 2016. In comparison with X round, an indicator of content of nitrogen that is easily hydrolyzed decreased on 13 and has made 123 mg/kg of soil. The average indicator of content of labile phosphorus in X tour grew on 24 and has made 176 mg/kg of soil, and stabilized in XI tour on the level of 167 mg/kg of soil. During 2006-2011 the growth of the weighted average indicator of content of labile compounds of potassium from 87 to 132 mg/kg of soil which was stabilised for 2016 was observed. The complex agrochemical point in X і XI round makes 58,9 and 58,5 respectively.
Authors and Affiliations
N. V. Onyshchuk
Keywords
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