Efficiency of subsowing of a lucerne in old-age artificial herbage at different modes of its use in the conditions of Yakutia
doi: 10.30766/2072-9081.2018.65.4.76-81.read all
S.A. Pavlova, PhD in Agriculture, leading researcher, laboratory of feed production, e-mail: Sachayana@mail.ru,
A.V. Kuzmina, PhD in Agriculture, senior researcher, laboratory of feed production, e-mail: Kuz60tonya@mail.ru,
E.S. Pestereva, PhD in Agriculture, senior researcher, laboratory of feed production, e-mail: Lena79pestereva@mail.ru,
N.N. Zhirkova, researcher, laboratory of feed production
Federal State Budgetary Scientific Institution Yakut Scientific Research Institute of Agriculture named after M.G. Safronov», Yakutsk, Republic of Sakha (Yakutia), Russian Federation, e-mail: Agronii@mail.ru
The research was conducted in 2004-2016 in the research and production station located 70 km higher Yakutsk on a terrace above flood-plain of the Lena river. The experiment is put on grass stand of the seventh year of growth. The basis of the stand consisted of the herbs, sown in 1997: Psathyrostachys juncea, Bromus inermis Leyss and Medicago falcata L. Soils of the experimental site are cryogenic, floodplain, sod (steppificated). Studied was the efficiency of mineral nitrogen (N60-120) against the background of P60K60 and subsowing of a lucerne in cereal oldage herbage (at a sсarifiсation and an inoсulation of seeds with bacterial preparation Yakut local strain CB No.1). The article provides the results of oldage cereal and bean and cereal herbage studies. Artificial herbage of the twelfth year of growth formed productivity of 1.4-2.5 t/hectare of dry matter at pasture use, with preservation of lucerne in herbage from 3 to 10%. At haying use productivity increase was obtained – 1.0 t/hectare of dry matter. High content of exchange energy (9.4 MJ) is noted at pasture use in variant with bean and cereal mix with lucerne subsowing (2004) + P60K60, at haying use in bean and cereal mix with subsowing of lucerne (2004) at a scarifica-tion + P60K60 it is 8.2 MJ. In old-age herbage the efficiency remains at the level of 1.1-1.6 feed units from hectare and 313-615 kg of crude protein.
Keywords: Central Yakutia, cryogenic soils, cereal, bean and cereal herbage, nitrogen-fixing strains, botanical structure, mineral fertilizers
Pavlova S.A., Kuzmina A.V., Pestereva E.S., Zhirkova N.N. Efficiency of subsowing of a lucerne in old-age artificial herbage at different modes of its use in the conditions of Yakutia // Agrarnayа nauka Evro-Severo-Vostoka. 2018. Vol. 65. no. 4. pp. 76-81. doi: 10.30766/2072-9081.2018.65.4.76-81.