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  • Importance of non-leguminous forbs in animal nutrition and their ensiling properties : a review
    Lukač, Branko ...
    Winter cover crops can reduce N losses from cropping systems; however, they can affect subsequent crops. Two field experiments were conducted in Slovenia to determine the effects of the Italian ... ryegrass (Lolium multiflourum Lam.) asa cover crop ant the date of spring plow-in on the soil mineral N (Nmin) content before winter and in spring, and on subsequent productivity of sugarbeet (Beta vulgaris L.) in exp. I (2004-2005), siummer seeded Italian ryegrass was fertilized with 60 kg N ha-1 (IRF) or not (IR0); the control (C) was without cover crop or fertilization. In exp. II (2005-2006), oil radish [Raphanus sativus L. spp. oleiferus (DC.) Metzg.] (OR) and white mustard (Sinapis alba L.) (WM) were added as additional treatments. In exp. I, the topgrowth of cover crops was removed in autumn from the field. Differences between IRF and IRO were not significant, neither in soil Nmin content, nor insugarbeet yield in any of the experiments. The IRF and IRO treatments significantly reduced soil Nmin content in spring. Early plow-in (EP; 17 d before sugarbeet seeding) resulted in higher soil N min content at seeding than did late plow-in (LP;4 d before seeding). In exp. I, fresh beet yield was higher for C than for IRF and IRO, and was higher in EP than in LP. In exp. II fresh beet yields were higher in control treatments C, OR, and WM thanin IRF and IRO, and was higher in EP than in LP. The IRF and IRO did not affect sugar concentration in Exp. I, and alfa-amino N concentration in Exp. II. Results suggest that Italian ryegrass as a winter cover crop can efficiently reduce soil Nmin content during autumn and winter. Results also indicated a negative effect of Italian ryegrass on succeeding sugarbeet fresh yield, althought the effect on white sugar yield was not significant at P_0.05.
    Vir: Žemdirbyste = Zemledelie : Mokslo žurnalas = Agriculture : Scientific journal. - ISSN 1392-3196 (Vol. 99, No. 1, 2012, str. 3-8)
    Vrsta gradiva - članek, sestavni del
    Leto - 2012
    Jezik - angleški
    COBISS.SI-ID - 3819624

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