Responses of Potato (Solanum tuberosum L.) to Green Manure Cover Crops and Nitrogen Fertilization Rates

被引:0
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作者
Mehmet Sincik
Z. Metin Turan
A. Tanju Göksoy
机构
[1] Uludag University,Faculty of Agriculture, Department of Field Crops
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关键词
Nitrogen rate; Green manure plants; Tuber yield; Potato varieties; Tuber dry matter yield; Common vetch; Faba bean;
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摘要
This study compared the effects of common vetch (Vicia sativa L.), faba bean (Vicia faba L.), and winter wheat (Triticum aestivum L.; control) cover crop green manures in combination with four rates of nitrogen (N) on tuber yield and quality of three potato varieties (Marfona, Hermes and Agria) during 2-years (2004–2005). Results over years were combined for final analysis. Above-ground dry matter for common vetch and faba bean green manure crops were 2,300 and 2,587 kg ha−1, respectively. Mean root dry matter yield of faba bean (285 kg ha−1) was higher than common vetch (120 kg ha−1). Nitrogen (N) yields of common vetch and faba bean green manure crops were 49 and 58 kg N ha−1 for above-ground and 2.0 and 5.0 kg N ha−1 for root dry matter, respectively. Averaged over all nitrogen fertilizer rates, potato plants grown in plots following common vetch and faba bean green manure cover crops produced 12.7% and 15.0% more tuber yield ha−1, respectively, compared with plants in the winter wheat plots. Potatoes following green manure legume cover crops produced approximately 36% to 38% higher tuber yields compared with potatoes grown following winter wheat when no nitrogen fertilizer was applied. Differences between tubers yields following cover crops decreased as N rates increased. Results over combined 2-years indicated that the economically optimum N rate (EONR) was an average of 30 kg N ha−1 lower for potato following green manure legume cover crops compared with potato following winter wheat cover crop.
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页码:150 / 158
页数:8
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