Abstract
The experiment was carried out for two successive years (2017 and 2018) at to evaluate the effect of different levels of phosphorus and nitrogen fertilizer application on yield and yield components of sunflower. One released variety Oissa and two pipe lines Adadi- 1 and NK ferti; five fertilizer rates (F1= No fertilizer, F2= 11.5 kg N/ha & 11.5 P2O5 kg/ha, F3= 23 kg N/ha & 23 kg P 2 O 5 /ha), F4= 34.5 kg N/ha & 34.5 kg P 2 O 5 /ha and F5= 46 kg N/ha & 46 kg P 2 O 5 /ha ) were arranged in RCBD with factorial combination and three replication. The main effect of fertilizer rate significantly affected all yield and yield related traits except seed oil content at both locations. Oissa have almost the same seed yield response both sites with an average seed yield of 1653kg/ha and 1641 kg/ha respectively. The partial analysis result showed out of the five tasted fertilizer rates application of 34.5 kg N/ha and 34.5 kg P 2 O 5 /ha becomes profitable than others and can be recommended for sun flower production. This preferable fertilizer rate record high net benefit for all varieties but it needs a variety preference for locations. Using the same fertilizer rate, Adadi 1 and 'Nk fert' varieties gave high seed yield at Adadi than Holetta sites. Keywords: sunflower, variety, fertilizer rate, seed yield, seed oil DOI: 10.7176/JNSR/11-15-05 Publication date: August 31 st 2020
Highlights
Sunflower (Helianthus annuus L.) is a member of the family composite
The aim of this study was to evaluate the effect of different levels of phosphorus and nitrogen fertilizer application on yield and yield components of sunflower in order to achieve the optimum use of resources
The experiment was laid in a randomized complete block design with three replication The treatments were a factorial combination of three varieties: One released variety Oissa and two pipe lines (Adadi- 1 and NK ferti) and five fertilizer rates (F1= No fertilizer, F2= 11.5 kg N/ha & 11.5 P2O5 kg/ha, F3= 23 kg N/ha & 23 kg P2O5 /ha), F4= 34.5 kg N/ha & 34.5 kg P2O5/ha and F5= 46 kg N/ha & 46 kg P2O5/ha )
Summary
Sunflower (Helianthus annuus L.) is a member of the family composite. Sunflower is an important oilseed crop which ranks third after soybean and peanut along with other oil seed crops like (canola, and cotton) which contributes considerably to edible oil in the world (Thavaprakash et al, 2002). The oleic acid (a monounsaturated fatty acid) content of oil seeds has important implications for product preference and consumer health. Ryland (2003) compared different vegetable oils and found that sunflower oil to be the healthiest due to its high oleic acid content. Sunflower can improve edible oil production due to its high oil contents and wide adaptability to soils and climatic conditions. The importance of supplemental Phosphorus fertilizer in enhancing sunflower yield has been well documented (Muralidharudu et al, 2003). The aim of this study was to evaluate the effect of different levels of phosphorus and nitrogen fertilizer application on yield and yield components of sunflower in order to achieve the optimum use of resources
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