Influence of the aftereffect of mineral fertilizers on the productivity of a long-term phytocenosis in the conditions of the Privilyui agrolandscape of the middle taiga subzone of Yakutia
The article provides the research of 2011-2019 on studying the long-term influence of the aftereffect of 36-year application of mineral fertilizers on the productivity and nutritional value of long-term meadow phytocenoses. In a stationary experiment with a radical improvement of meadows, the follow...
Published in: | Agricultural Science Euro-North-East |
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Main Authors: | , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | Russian |
Published: |
FARC North-East
2022
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Subjects: | |
Online Access: | https://www.agronauka-sv.ru/jour/article/view/1182 https://doi.org/10.30766/2072-9081.2022.23.6.860-867 |
Summary: | The article provides the research of 2011-2019 on studying the long-term influence of the aftereffect of 36-year application of mineral fertilizers on the productivity and nutritional value of long-term meadow phytocenoses. In a stationary experiment with a radical improvement of meadows, the following variants for applying mineral fertilizers were studied from 1974 to 2010: the minimum level was N62P60K11 (control), the average level was N202P175K43, and the maximum level was N318P362K189. In the conditions of the Privilyui agrolandscape of the middle taiga subzone of Yakutia, a long-term aftereffect of fertilizers (from 2011 to 2019) contributed to the preservation of the main dominant in the grass stand - couch grass (Elymus repens (L.) Nevski) up to 27.4-42.1 % and codominant – short-awned barley (Hordeum brevisubulatum (Trin) Link.) up to 14.7-24.3 %. During the aftereffect of fertilizers, the yield of cereal-forb phytocenosis averaged 1.71-2.03 t/ha of hay, which is 2.1-2.5 times higher than the yield of natural meadows. At the same time, hay forage contained up to 8.9-9.1 MJ of exchange energy, up to 0.62-0.65 feed units, and up to 80-90 g of digestible protein, which corresponds to the zootechnical norm. В статье представлены исследования, проведенные в период с 2011 по 2019 год по изучению длительного влияния последействия 36-летнего применения минеральных удобрений на продуктивность и питательность долголетних луговых фитоценозов. В стационарном опыте с коренным улучшением лугов изучали следующие варианты внесения минеральных удобрений (с 1974 по 2010 год): минимальный уровень – N62Р60К11 (контроль); средний – N202Р175К43; максимальный – N318Р362К189. В условиях Привилюйского агроландшафта среднетаежной подзоны Якутии длительное последействие удобрений (с 2011 по 2019 год) способствовало сохранности в травостое основного доминанта – пырея ползучего (Elymus repens (L.) Nevski) до 27,4-42,1 % и содоминанта – ячменя короткоостистого (Hordeum brevisubulatum (Trin) Link.) до 14,7-24,3 %. За период ... |
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