Abstract
Purpose: Soils of the experimental area are low in vital nutrients such as nitrogen. Fallow is no longer possible because of increasing pressure on arable land. The limited available chemical fertilizers must be inevitably and judiciously used for optimum yield. The study was carried out to assess the response of sweet sorghum varieties to varying nitrogen fertilizer (N) rates.Research Method: Sweet sorghum varieties (NTJ-2, 64 DTN, SW Makarfi 2006 and SW Dansadau 2007) were alloted to the main plots and nitrogen fertilizer (0, 40, 80, 120 and 160 kg N ha-1) to the sub-plots of a split-plot design, in three replicates. Data on growth and yield characteristics were collected and analysed.Findings: Variations were observed among the four varieties of sweet sorghum; SW Dansadau 2007 had greater growth and yield characteristics. N fertilizer had positive effects on the growth characteristics and ethanol yield of the crop. 80 kg N ha-1 resulted in increase of most parameters and ethanol yield, beyond which there was either no significant difference or a drop in the values of these parameters. Thus the use of 80 kg N ha-1 would result in optimum yield of sweet sorghum in the study area.Limitations: The requirement of 80 kg N ha-1 may not be generalized for the entire southern guinea savanna agro-ecological of Nigeria as the study was carried out only in one location.Originality/Value: These findings would assist farmers in the study area identify the most promising sweet sorghum variety and the optimum fertilizer rate for its production.
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Claims 6
Claim · model-written summary
SW Dansadau 2007 showed greater growth characteristics than other varieties.
Verbatim
e0“Variations were observed among the four varieties of sweet sorghum; SW Dansadau 2007 had greater growth and yield characteristics.”
Claim · model-written summary
SW Dansadau 2007 showed greater yield characteristics than other varieties.
Verbatim
e0“Variations were observed among the four varieties of sweet sorghum; SW Dansadau 2007 had greater growth and yield characteristics.”
Claim · model-written summary
Nitrogen fertilizer improved sweet sorghum growth characteristics.
- Taxon
- sweet sorghume1
- Treatment
- N fertilizere0
- Outcome
- growth characteristicse0
- Direction
- positive effectse0
Not reportedComparator
Verbatim
e0“N fertilizer had positive effects on the growth characteristics and ethanol yield of the crop.”
e1“sweet sorghum varieties”
Claim · model-written summary
Nitrogen fertilizer improved sweet sorghum ethanol yield.
Not reportedComparator
Verbatim
e0“N fertilizer had positive effects on the growth characteristics and ethanol yield of the crop.”
e1“sweet sorghum varieties”
Claim · model-written summary
At 80 kg N ha-1 most parameters and ethanol yield increased, while higher rates had no significant benefit or a decline.
- Taxon
- sweet sorghume1
- Treatment
- 80 kg N ha-1e0
- Outcome
- most parameters and ethanol yielde0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“80 kg N ha-1 resulted in increase of most parameters and ethanol yield, beyond which there was either no significant difference or a drop in the values of these parameters.”
e1“sweet sorghum varieties”
Claim · model-written summary
Authors recommend 80 kg N ha-1 for optimum sweet sorghum yield in the study area.
Verbatim
e0“the use of 80 kg N ha-1 would result in optimum yield of sweet sorghum in the study area”
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