Effect of seed rate and nitrogen fertilizer on weed species composition, density and diversity in two sesame varieties
| Autor: | Salihu Adamu Dadari, Bashir Ahmad Babaji, E. Daniya, November Chiroma Kuchinda, Williams Bata Ndahi |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Archives of Agronomy and Soil Science. 61:553-567 |
| ISSN: | 1476-3567 0365-0340 |
| DOI: | 10.1080/03650340.2014.943666 |
| Popis: | To evaluate the effect of seed and nitrogen rates on weed species composition, density, biomass and diversity in two sesame (Sesamum indicum L.) varieties, a field experiment was conducted in 2009, 2010 and 2011 rainy seasons at Samaru, Nigeria. Four seed rates, 2, 4, 6 and 8 kg ha−1, four nitrogen rates, 0, 30, 60 and 90 kg N ha−1 and two sesame varieties NCRIBEN 01M and E8 were arranged as factorial in a split plot design. Weeds with the highest important values in sesame field were Dactyloctenium aegyptium, Ludwigia decurrens, Ageratum conyzoides and Cyperus esculentus. Year had a significant effect on weed density, biomass, diversity, evenness and richness. Weed density, biomass, diversity and richness were lowest in the 2011 trial and weed species evenness in 2009. Variety E8 reduced weed biomass better than NCRIBEN 01M. Averaged over years, weed diversity and evenness were lowest at 4 kg seeds ha−1. Seed × nitrogen rates effect of 4 kg seed ha−1 and 30 kg N ha−1 produced the lowest weed species div... |
| Databáze: | OpenAIRE |
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