• • • Efficiency of crop rotations with different proportions of red clover, silage and grain forage crops in the forest-steppe of the Irkutsk region
Field forage production of the Irkutsk region provides Animal Husbandry with up to 80% of all the fodder. Most forage crops are integrated into field crop rotations where they perform as effective preceding crops and grow after grain or grain forage plants in late autumn. Multiple investigations proved that efficient system of fodder production in field can only be maintained as by-farm crop rotations. Such rotations enable growing wide number of various crops as optimal mixtures under preferable conditions. Incorporating more perennial legume grasses into crop rotations increases quantity and quality of feed as well as improves soil fertility due to symbiotic ability of nitrogen fixation. The paper reports on three five-field crop rotations that took place on grey forest soil. Proportion of red clover, silage and grain forage crops varied among the rotations. It was revealed that rotation of barley + clover – pea + oats + clover (for green mass production) – clover – maize (for ensiling) provided up to 3.2 t feed units ha-1, standard content of digestible protein (105–110 g) in 1 feed unit and high values of economic efficacy. Grain forage crops were fertilized by N60P30K30, maize — by N90P40K40, annual grasses and clover — by N60.
Source: http://kormoproizvodstvo.ru/en/12-2018-2/, p. 10
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