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, e-mail:koalder@yandex.ru,
V.M. Izmestyev, PhD in Agriculture, leading researcher, e-mail:izmest@yandex.ru,
E.A. Sokolova, junior researcher, e-mail:katushkina_@mail.ru
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, e-mail:via@mari-el.ru

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.