Changes of Weed Flora due to Nitrogen Addition in Sunflower

  • Ilias TRAVLOS Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str., 11855, Athens https://orcid.org/0000-0002-7713-0204
  • Panayiota PAPASTYLIANOU Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str., 11855, Athens https://orcid.org/0000-0003-2621-1183
  • Antonis ALEXOS Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str., 11855, Athens https://orcid.org/0000-0003-0623-226X
  • Panagiotis KANATAS Agricultural Cooperative of Mesolonghi-Nafpaktia, 30200 Mesolonghi
  • Dimitrios BILALIS Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str., 11855, Athens https://orcid.org/0000-0002-4585-7257
  • Anastasia TSEKOURA Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str.,11855, Athens
  • Ioanna KAKABOUKI Agricultural University of Athens, Department of Crop Science, Laboratory of Agronomy, 75 Iera Odos Str., 11855 Athens
  • Nikolina CHEIMONA Agricultural University of Athens, Department of Crop Science, 75 Iera Odos str., 11855, Athens
Keywords: Helianthus annuus; nitrogen; sunflower; weeds; yield

Abstract

A field trial was conducted in Domokos region, in central Greece with Helianthus annuus, hybrid ‘LG 5658’ in order to evaluate the effects of different N fertilization and weed control methods on sunflower yield and weed flora. ANOVA showed that the interaction of fertilization and weed control had a significant effect on grain yield. Moreover, this study revealed that the density of the common weeds Amaranthus retroflexus, Abutilon theophrasti, Xanthium strumarium and Echinochloa crus-galli was increased by 60, 40, 33 and 23% in the plots of high N rate without any herbicide use. On the contrary, weeds like Datura stramonium and Convolvulus arvensis were not significantly affected by fertilization. This different responsiveness of the several weed species could be further exploited through programs of integrated crop and weed management. Moreover, our findings related to the differences in herbicide efficacy resulting from different N levels may alter weed flora and explain possible weed control failures.

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Published
2019-12-23
How to Cite
TRAVLOS, I., PAPASTYLIANOU, P., ALEXOS, A., KANATAS, P., BILALIS, D., TSEKOURA, A., KAKABOUKI, I., & CHEIMONA, N. (2019). Changes of Weed Flora due to Nitrogen Addition in Sunflower. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(4), 1337-1339. https://doi.org/10.15835/nbha47411744
Section
Research Articles