Productivity of natural phytocenoses of the Namsky agrolandscape in Yakutia under organic and mineral nutrition regimes
https://doi.org/10.26898/0370-8799-2021-6-5
Abstract
The results of the study of the productivity potential of natural phytocenoses of different species composition in the Namsky agrolandscape of the middle taiga subzone of the Republic of Sakha (Yakutia) are presented. The research was conducted in 2009-2016. The soils of the experimental plot are permafrost soils with a thin humus layer. The effect of mineral and organic fertilizers on the productivity of steppe meadows was studied. On herb-grass, wheatgrass, steppificated phytocenoses the following practices of organo-mineral nutrition of plants were used: control (no fertilizer); humus 20 t/ha; humus 20 t/ha once every 4 years + N60P60K60 annually; N30P30K30 annually; humus 20 t/ha annually. The optimum rates of organic and mineral nutrients to improve the productivity potential of natural steppe meadows have been established. The highest productivity potential in the Namsky agrolandscape was obtained with the combined application of organic and mineral fertilizers (humus 20 t/ha once every 4 years + N60P60K60 annually). On herb-grass and wheatgrass phytocenoses hay yield reached 23.0-24.1 c/ha. Yield per 1 ha of metabolizable energy was 27.0-22.4 GJ, fodder units 1472-1663, crude protein 336-371 kg. The content of digestible protein in 1 fodder unit in herb-grass was 92 g, in wheatgrass - 102 g. The annual application of mineral fertilizers at a dose of 60 kg/ha of the active substance provided a 2-fold increase in the productivity of natural phytocenoses, depending on agroclimatic conditions of the growing season. The influence of mineral fertilizers and their joint application with organic fertilizers on the yield of natural phytocenoses is statistically reliable, which indicates the possibility of regulating the productivity of steppificated phytocenoses.
About the Authors
V. V. Ustinova
Arctic State Agrotechnological University
Russian Federation
Russian Federation
Vasena V. Ustinova, Candidate of Science in Agriculture, Senior Lecturer
The Republic of Sakha (Yakutia)
N. V. Barashkova
Institute of Biological Problems of the Cryolithozone of the Siberian Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Natalya V. Barashkova, Doctor of Science in Agriculture, Head Researcher, Associate Professor, Department Head
41, Lenina St., Yakutsk, The Republic of Sakha (Yakutia), 677000
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Review
For citations:
Ustinova V.V., Barashkova N.V. Productivity of natural phytocenoses of the Namsky agrolandscape in Yakutia under organic and mineral nutrition regimes. Siberian Herald of Agricultural Science. 2021;51(6):39-46. https://doi.org/10.26898/0370-8799-2021-6-5
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