The balance of nitrogen in the soil after a long application of fertilizers in crop rotation

Hospodarenko, G. M.; Прокопчук, И. В.; Nikitina, O.V.

doi:10.31395/2415-8240-2017-90-1-7-14

Cited by 4 publications

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“…G.N. Hospodarenko et al (2015) based on mathematical analysis of spring barley yield data, show that with low fertilisation rates (N 45 P 45 K 45 ), it is not possible to maintain it at a constant level, although it was higher compared to areas without fertilisers. In the variants of the experiment with high doses of fertilisers, a decrease in the average annual yield increase was noted over time.…”

Section: Resultsmentioning

confidence: 99%

Untitled

2024

Rosl. g̀runtozn.

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The introduction of organic technology for growing vegetable plants will help to reduce the environmental burden of pesticides and produce safe vegetable products with high yields. The purpose of the study was to investigate the effect of biological preparations on the organic cultivation of vegetable plants. Field, measuring and weighing, mathematical and statistical methods were used to determine the efficacy of the preparations. The study was conducted in 2018-2021 in different

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Section: Resultsmentioning

confidence: 99%

Untitled

2024

Rosl. g̀runtozn.

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Section: Resultsmentioning

confidence: 99%

Assessment of the influence of mineral fertilisers on the phosphate regime of meadow chernozem carbonate soil and yield of sunflower and winter wheat

Tonkha,

Pak,

Kozak

et al. 2024

Rosl. g̀runtozn.

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The relevance of the study lies in the need to maintain optimal levels of mobile phosphorus in carbonate soils to support healthy plant growth and development, as it can be converted into less mobile forms in such soils. The purpose of the study was to assess the impact of various long-term fertilisation strategies on the content of various forms of phosphorus in the soil to improve this availability. The research was conducted in 2019-2022 as a stationary experiment in a separate division of the National University of Life and Environmental Sciences of Ukraine “Agronomic Experimental Station” in Kyiv Oblast on meadow chernozem carbonate low-humus coarse-sawn light loamy soil in a five-field crop rotation, where the influence of different levels of fertiliser saturation (no fertiliser, minimum, average, and optimal) on soil phosphate status and yield of Etana winter wheat variety and Sumiko sunflower hybrid was investigated. Soil samples were taken from the 0-20 and 20-40 cm layers, and the group and fractional composition of phosphates was determined using the Chang-Jackson method and the content of mobile phosphates using the Chirikov and Machigin methods. According to the analysis of the group and fractional composition of soil phosphates, it was found that in meadow chernozem carbonate low-humus coarse-sawn light loamy soil, the content of iron phosphates prevails among all fractions during long-term fertilisation. The results showed an increase in the content of aluminium phosphates in the 0-20 cm surface layer of the soil of two variants with long-term fertilisation, and an increase in the content of the second fraction of soluble calcium phosphates (Ca-PII), with the minimum saturation (N27P18K20) with the highest available phosphate fraction for plants (Ca-PI) is observed. The content of mobile phosphates was maximal at optimal fertiliser saturation (N81P54K62) and was 4.8 and 8.5 mg/100 g of soil, the aftereffect of organic fertilisers positively affected the accumulation of mobile phosphates in the soil. The highest yield of winter wheat (7.55 t/ha) and sunflower (4.28 t/ha) was obtained with optimal fertiliser saturation, the lowest – without the use of fertilisers, where it was 4.45 t/ha for winter wheat and 2.23 t/ha for sunflower. The results of the study can be used to develop more sustainable and effective strategies for using phosphorus in soils, which can help preserve soil resources and prevent possible contamination of water sources due to excessive phosphorus intake

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“…As far as potassium in soils is concerned, it is usually found as soluble potassium, exchangeable potassium, non-exchangeable potassium, and potassium in minerals. These forms of potassium are located in a constant dynamic equilibrium with each other (Jalali 2007, Seredina 2013, Gospodarenko et al 2013. As back as 1912, it was shown the possibility of the transition of non-exchangeable potassium in exchange forms (Pchelkin 1966, Sokolova 1987).…”

Section: Introductionmentioning

confidence: 99%

Forecasting of the impact of acidity on the content of mobile forms of potassium in the soils of forest-steppes of Ukraine

Kucher

2019

pjss

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<p>The level of soil acidity (рН) has the significant impact on availability of potassium to plants. For almost the century, scientists have discussed the issue of acidity of soils. Till nowadays, it is known, that carriers of potential acidity are Н+ and АІ3+ ions, which are situated in the solid phase of soil in the exchanged and absorbed state, but soil solution is acidified as a result of exchange reactions during increase of concentration of electrolytes in it (for example, during application of fertilizes the soil). Our task was to explore the impact of acidity of soil solution on the movement of potassium in some soils of forest-steppes of Ukraine: typical chernozem, podzolized chernozem and meadow chernozem. In the laboratory conditions the soil samples were influenced by citrate-phosphate-borate buffer solution of different volumes of рН – from 2.8 till 9.5 units, and the potassium content was determined by flame photometry. Based on the research results, there were created mathematical models which predict the potassium content when changing soil acidity. An exponential functional relationship between potassium content in the soil solution and its pH is established. This functional dependence allows to predict the levels of transition of potassium to the soil solution in the conditions of lowering the pH.</p>

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The balance of nitrogen in the soil after a long application of fertilizers in crop rotation

Cited by 4 publications

References 0 publications

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Assessment of the influence of mineral fertilisers on the phosphate regime of meadow chernozem carbonate soil and yield of sunflower and winter wheat

Forecasting of the impact of acidity on the content of mobile forms of potassium in the soils of forest-steppes of Ukraine

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