Effects of Different Nitrogen Fertilizer Levels on Sunflower Growth and Yield Attributes

Chantal, Kwizera; Ong'or, Basil T. Iro; Bandushubw, Denis; Soter, Ndihokubwayo; Felix, Shabani

doi:10.3923/pjn.2018.557.562

Cited by 1 publication

(1 citation statement)

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“…The response of sunflower growth was due to an increase levels of N from the initial negligible or low soil N (Table 1) and rectify the N deficiency and leads to vigorous growth. Increased levels of N enhanced leaf chlorophyll content, produced more carbohydrate and promote the vegetative growth of the plant (Chantal et al, 2018 and in the current study). Application of N @ 25% basal:75% top dressed significantly produced the tallest plant with highest stem girth (Table 1).…”

Section: Growth Parameterssupporting

confidence: 76%

Effect of Nitrogen Rate and Application Ratio on Late Sown Sunflower in Wet Soil under Zero Tillage in the Coastal Zone of Southwestern Bangladesh

Sarker

Ali

Bell

et al. 2022

IJARe

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Background: The cropping pattern of southwestern (SW) coastal Bangladesh has been improving from Fallow-Fallow-Transplanted aman paddy to Sunflower-Fallow-Transplanted aman paddy. The emerging cropping pattern of SW Bangladesh from single transplanted aman paddy to double cropping, sunflower in winter after transplanted aman paddy needs new crop husbandry including nutrient management particularly nitrogen (N). Hence, the present study aimed to evaluate the yield response of late sown sunflower to rates and application ratio (basal:top dressed) of N in the coastal soil of SW Bangladesh. Methods: The field experiment was conducted during winter season (2018-19) in a randomized complete block design and replicated thrice. The experimental treatments consisted of seven N rates (0, 60, 90, 120, 150, 180 and 210 kg ha-1) and three application ratio (50%:50%, 25%:75% and 0%:100%). Result: Results revealed that with the increased of N rates, dry matter, seed yield, yield attributes and net income were substantially increased: the highest values of these parameters were found at 150 and 180 kg N ha-1 when applied @ ratio of 25%:75% (basal: top dressed) despite non-significant interaction while the agronomic efficiency was higher at 60 kg ha-1 next decreased. The findings of the study suggested that N @ 150 kg ha-1 with 25%:75% application ratio is suitable for late sown sunflower in the coastal soil of SW Bangladesh.

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Section: Growth Parameterssupporting

confidence: 76%