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Productivity of fodder crop rotations depending on the nitrogen fertilizers

doi: 10.30766/2072-9081.2018.63.2.69-73.

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A.K. Svechnikov, researcher,,
V.M. Izmestyev, PhD in Agriculture, leading researcher,,
E.A. Sokolova, junior researcher,
Mari Agricultural Research Institute – Branch of Federal Agrarian Research Center of the North-East named N.V.Rudnitsky, Ruem village, Medvedevsky district, Mari El Republic, Russian Federation,

Legumes in the structure of fodder crop rotations can cause reducing the efficiency of nitrogen fertilizer application on sod-podzolic soil. A comparative assessment of the productivity of six-field fodder crop rotations with different field number of legume-cereal grasses was carried out on the background of mineral nitrogen application (Р60К60, N60Р60К60). The research was carried out in 2013-2017 in crop rotations with 16%, 33% and 50 % legume-cereal grasses saturation in the Mari El Republic. It was noted that one-year extension of period for using perennial legume-cereal grasses in the fodder crop rotations under study was followed by increase in dry matter collection by 1.1-2.1 t/ha, exchange energy - by 6.7-16.5 GJ/ha, and crude protein - by about 2.3-3.7 C/ha. Continuous application of mineral nitrogen led to increasing the productivity of fodder crop rotations with legume-cereal grasses by 9-21%. In crop rotations, target annual and winter crops ensured a significant increase in productivity, with the exception of annual grasses with perennial grasses undersowing in 2013. The greatest increase in productivity was noted in the first crop rotation, where a long-term agrocenosis had been used for 1 year only. The ammonium nitrate application resulted in increase in crude protein collection more than in other productivity indicators of fodder crop rotations target crops.

Keywords: fodder crop rotation, legume-cereal, nitrogen, productivity, dry matter, exchange energy, crude protein

For citation:

Svechnikov A.K., Izmestyev V.M., Sokolova E.A. Productivity of fodder crop rotations depending on the nitrogen fertilizers. Agrarnayа nauka Evro-Severo-Vostoka. 2018. Vol. 63. no. 2. pp. 69-73. doi:10.30766/2072-9081.2018.63.2.69-73.