Regulation of nitrogen-carbon interactions in agroecosystems in the forest-steppe zone of Ukraine

Velichko, V. V.; Demidenko, Olexander

doi:10.15407/agrisp2.01.035

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…It is difficult to balance carbon due to the fact that the primary processes of photosynthesis use carbon dioxide released from the soil both in the course of microbiological activity and again as a result of the "respiration" of the roots. To a large extent, the reserves of soil carbon, depending primarily on the type of soil [6], are associated with its removal with the harvest [7], which, to varying degrees, is associated with the loss of nitrogen [8,9].…”

Section: Figmentioning

confidence: 99%

The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

Акименко¹,

Masyutenko²,

Dudkina³

2021

BIO Web Conf.

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The purpose of the study is to determine the suitability for making sound decisions on the reproduction of soil fertility of the following quantitative laws of the methodology for managing material and energy flows in crop rotations: the energy content of 1 ton of humus (in GJ) is equal to half the nitrogen contained in it (in kg); the amount of exchangeable energy (in GJ) in 100 kg of phytomass is equal to the halfsum (in kg) of nitrogen and phosphorus pentoxide (about 2/3 of it falls on nitrogen). The approbation was carried out on the data of long-term stationary experiment. The results are as follows: with an increase in the level of fertilizer, nitrogen removal with the yield increased by 30–40%, and that of phosphorus by 6–12%; due to doubling the manure rate and the use of mineral fertilizers, the phosphorus balance became positive, and the nitrogen one remained negative, but improved by 17–28% depending on the type of a crop rotation. The deviation of the calculated balance of the exchangeable energy from the actual one on the poorly and most richly fertilized backgrounds was -5.5 to -11.9% and 3.0 to 8.6%., respectively.

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Section: Figmentioning

confidence: 99%

The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

Акименко¹,

Masyutenko²,

Dudkina³

2021

BIO Web Conf.

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Soil-Remediating Activity of Agroecosystems and Chernozem Fertility Restoration Using Low-Carbon Technologies

Demidenko¹,

Velichko²

2015

Agric. sci. pract.

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Aim. To present theoretical justifi cation of the increase in potential fertility of typical chernozem with system- atic application of zero tillage via the creation of soil conditions, optimal for photosynthesis, and provision of maximal physiological activity of root systems of cultivated crops to restore natural processes of soil formation in the agroecosystems of the Left-Bank Forest-Steppe of Ukraine. Methods. Field, laboratory, computational, mathematical and statistical. Results. The analysis of scientifi c literature and our own studies (for over 30 years) have demonstrated that the conditions of minimal tillage ensure the connection between the physiologi- cal rhythms of activity of agricultural crops, the rhythms of humus decomposition and synthesis, the fi xation of carbonic acid by the heterotrophic saprophyte microfl ora and carbonation, restoring soil formation in agroeco- systems. Agricultural crops in the agroecosystems are self-developing, auto-regulated, open systems, capable of overcoming the forces, causing the increase in entropy and forming highly regulated and dynamically stable complexes of different hierarchy. High information capacity and codifi cation of cultivated crops defi nes the direction of the development of soil medium in agroecosystems. When the genetic information capacity of the development of cultivated crops resonates with the information capacity of the soil medium development, there is either the soil formation process or the process of extensive fertility restoration in agroecosystems. Conclusions. The maintenance and application of aboveground by-products of crop production, suffi ciently compensated in terms of nitrogen using mineral fertilizers, as organic fertilizers, and wrapped up into the sur- face layer of chernozem during the zero tillage, simulates the natural course of nitrogen-carbon circulation in agroecosystems of different types. The restoration of the natural soil formation model in the agroecosystems is ensured by the stimulation of physiological activity of cultivated crops in the agroecosystems due to the launch of drain mechanisms of carbon with the increase in СО 2 content in the lowest atmospheric layers dur- ing the vegetation period of crops, which should be the basic model of extensive fertility restoration of typical chernozem.

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Regulation of nitrogen-carbon interactions in agroecosystems in the forest-steppe zone of Ukraine

Cited by 2 publications

References 7 publications

The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

The use of natural resources and reproduction of soil fertility in obtaining a given quantity of products

Soil-Remediating Activity of Agroecosystems and Chernozem Fertility Restoration Using Low-Carbon Technologies

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