Plant Soil Environ., 2004, 50(5):205-211 | DOI: 10.17221/4023-PSE

Response of irrigated sunflower (Helianthus annuus L.) hybrids to nitrogen fertilization: growth, yield and yield components

H. Özer, T. Polat, E. Öztürk
Faculty of Agriculture, Atatürk University, Erzurum, Turkey

N fertilization has a substantial influence on sunflower (Helianthus annuus L.) seed yield and quality. It was also well established that high-yielding sunflower hybrids had more N requirement than old cultivars such as open-pollinated ones. However, in Turkey, no sufficient information regarding the response of new developed oilseed sunflower hybrids to nitrogen fertilization under irrigated conditions. Therefore, a 2-year study was conducted to determine the effects of nitrogen application rates on the growth, yield, and yield components of two oilseed sunflower hybrids (AS-508 and Super 25) under irrigated conditions. In this study, all plant parameters were significantly influenced by applied nitrogen fertilizer rates. Yield response to nitrogen rates was positive and linear. Our research data indicated that under irrigated conditions N rate of 120 kg/ha was adequate for sunflower production in this region.

Keywords: sunflower; nitrogen rate; growth; seed yield; yield components

Published: May 31, 2004  Show citation

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Özer H, Polat T, Öztürk E. Response of irrigated sunflower (Helianthus annuus L.) hybrids to nitrogen fertilization: growth, yield and yield components. Plant Soil Environ. 2004;50(5):205-211. doi: 10.17221/4023-PSE.
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