Weed flora and seed yield in quinoa crop (Chenopodium quinoa Willd.) as affected by tillage systems and fertilization practices |
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| Authors: | Ioanna Kakabouki Anestis Karkanis Ilias S Travlos Dimitra Hela Panagiota Papastylianou Hanwen Wu |
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| Institution: | 1. Department of Agricultural Products and Food Business Administration, University of Patras, Agrinio, Greece;2. Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Volos, Greece;3. Department of Crop Science, Laboratory of Agronomy, Agricultural University of Athens, Athens, Greece;4. E.H. Graham Centre for Agricultural Innovation, Wagga Wagga Agricultural Institute, Wagga Wagga, Australia |
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| Abstract: | The effects of tillage system and fertilization regimes on weed flora in quinoa (Chenopodium quinoa Willd.) were evaluated by means of two field experiments in 2011 and 2012. The experiments were laid out in a split-plot design with two main plots (conventional and minimum tillage) and four sub-plots (fertilization regimes). The results indicated that weed biomass and density in quinoa were influenced by the different fertilization and tillage treatments. Moreover, seed yield in conventional was 5%–13% higher than that of minimum tillage, probably due to the lower weed density and biomass. Concerning fertilization treatments, total weed density and biomass increased under manure application and inorganic fertilization. Tillage effects on weeds were species specific. The density of perennial weeds such as purple nutsedge (Cyperus rotundus L.) and the density of small-seeded weeds such as redroot pigweed (Amaranthus retroflexus L.) and common purslane (Portulaca oleracea L.) were significantly lower under the conventional tillage than under the minimum tillage system. |
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| Keywords: | weed management quinoa tillage fertilization perennial weeds |
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