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  • Leaf area index in winter wheat : response on seed rate and nitrogen application by different varieties
    Bavec, Martina ...
    The most important photosynthesis acceptor - leaf area vary among cultivation measures and it is limited factor for creating exact growth models in common winter wheat. The objective of this study ... was to investigate changes of leaf area index (LAI) affected by agricultural treatments - 4 sowing rates and 9 nitrogen treatments based on fertilising rates, target values based on soil mineral nitrogen and plant sap target values including different varieties. Increasing sowing rates from 350 to 800 viable seeds m-2 increased LAI at EC 75 stage from 2.9 to 5.5, where LAI 4.1 at 500 seeds m-2 did not vary between lower and higher rates; also at EC 85 stage LAIs did not differ significantly.At EC 75 stage LAI differed among control and nitrogen treatments from 1.0 to 6.5 and at 85 stage from 0.1 to 2.4, wth differences in interaction among varieties. Higher nitrogen rates for first and second topdressing increased LAI in both stages compared without dressing treatments.Due to significant differences among LAI as consequence of production system, we suggest to take this into account in every prediction and modelling of growth in winter wheat.
    Vir: Journal of Central European Agriculture [Elektronski vir] : JCEA. - ISSN 1332-9049 (Letn. 8, št. 3, 2007, str. 337-342)
    Vrsta gradiva - članek, sestavni del
    Leto - 2007
    Jezik - angleški
    COBISS.SI-ID - 2611244

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