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  • Effects of plant population on leaf area index, cob characteristics and grain yield of early maturing maize cultivars (FAO 100-400)
    Bavec, Franc ; Bavec, Martina
    Maize (Zea mays L.) growth in non-typical maize growing regions has several limitations with respect to agronomic characteristics of cultivars, and their reactions on changes of production system in ... specific climate. Two long term field experiments were carried out to investigate the effects of plant populations (PP) on the leaf area index (LAI), grain yield and cob characteristics of maize cultivars in Maribor, Slovenia. In the first experiment, an increase of PP from 4.5 to 13.5 plants per m2 did not effect the LAI of four older maize cultivars at the 7-9 leaf stage, but significant differences between cultivars, years and PP appeared at brooming (from 1.58 to 7.07). In this stage , a strong correlation existed between LAI and grain yield (r=0.87**). Reduction of LAI from brooming to wayz maturity avaraged 9.7%. PP expliined 93-99 % of the variation to grain yield depending on cultivars. Some cultivars lodged at the highest PP in some years. Increased PP significantly changed the following cob characteristics, weight to 1000 kernels, cob lenght, number of kerner rows, and number of kernels per row. In the second experiment, 11 recent cultivars expressed a relatively small trend of grein yield increases when PP was increased from 7 to 13 plants per m2. At high PP, the percent of plants decaying after emergence increased up to 27% during the vegetation period. Therefore, we conclude that the information on suitable PP for each maize cultivar is one of the key factors for planning maize production.
    Vir: European journal of agronomy : The journal of the European society for agronomy. - ISSN 1161-0301 (16, No. 2, 2002, str. 151-159)
    Vrsta gradiva - članek, sestavni del
    Leto - 2002
    Jezik - angleški
    COBISS.SI-ID - 1807148

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