Abstract
Striga hermonthica (Del.) Benth ( Scrophulariacae ), which is aggravated by the inherent low soil fertility, recurrent drought and continuous cereal monoculture, is one of the major production constraints in the sorghum growing regions of Ethiopia. Thus, an experiment on evaluation of agronomic practices for Striga controlling management on sorghum was conducted in 2016 and 2017 cropping seasons to determine the appropriate Striga controlling management practice under rain fed conditions. Treatments (T) comprised (T1) farmers’ practice (no fertilizer and intercropping) as a control; (T2) compost (at10 ton ha -1 ); (T3) intercropping with Mungbean variety (N-26); (T4) inorganic fertilizer (at 41kg N ha -1 and 46 kg P 2 O 5 ha- 1 ); (T5) 50% compost + 50% inorganic fertilizer; (T6) 50% compost + intercropping; (T7) 50% inorganic fertilizer + intercropping; (T8) 50% compost + intercropping + 50% inorganic fertilizer rate; (T9) Striga resistant sorghum. These treatments were laid out in Randomized Complete Block Design (RCBD) with three replications. According to the current results, the maximum average grain yield (4640.40 kg ha -1 ) and total biomass (10879.60 kg ha -1 ), head weight (93.54 g), and plant height (164.16 cm) were recorded prominently in plots treated with inorganic fertilizer. The combination of compost and inorganic fertilizer also gave remarkable grain (4537.80 kg ha -1 ) and biomass yields (10592.60 kg ha -1 ). Moreover, Striga population reduced due to application of inorganic fertilizers (0.95 Striga m -2 ). A significant reduction was also observed when plots were treated with the combination of compost and inorganic fertilizer (1.17 Striga m -2 ). Similarly, as compared to farmers’ practice (2.37 Striga m -2 ), low number of Striga m -2 (1.24) was recorded from resistant sorghum variety (Gubiye). Based on economic analysis, application of 50% compost + 50% inorganic fertilizers gave optimum marginal rate of return (MRR) (165.66%), which was above the minimum rate of return (100%). Generally, this experiment showed that productivity of sorghum is considerably higher when farmers use integrated soil fertility management options. This is, therefore, integrated use of 50% compost and 50% inorganic fertilizers should be recommended for farmers as they were affordable options for increasing sorghum yields with improving soil fertility in the small-scale farming systems of the study area. Furthermore, integrated use of organic and inorganic fertilizers proved to be highly effective in terms of reducing Striga incidence both in terms of reduced seed density in the soil and decreased infection in sorghum. Keywords : Agronomic practices, Sorghum , Striga , Yield, Yield components DOI : 10.7176/JNSR/10-1-04 Publication date: January 31 st 2020
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Claims 14
Claim · model-written summary
Inorganic fertilizer produced the maximum grain yield of 4640.40 kg ha -1.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum average grain yield (4640.40 kg ha -1 ) and total biomass (10879.60 kg ha -1 ), head weight (93.54 g), and plant height (164.16 cm) were recorded prominently in plots treated with inorganic fertilizer”
t0“on Sorghum”
Claim · model-written summary
Inorganic fertilizer produced maximum total biomass of 10879.60 kg ha -1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum average grain yield (4640.40 kg ha -1 ) and total biomass (10879.60 kg ha -1 ), head weight (93.54 g), and plant height (164.16 cm) were recorded prominently in plots treated with inorganic fertilizer”
t0“on Sorghum”
Claim · model-written summary
Inorganic fertilizer produced maximum head weight of 93.54 g.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum average grain yield (4640.40 kg ha -1 ) and total biomass (10879.60 kg ha -1 ), head weight (93.54 g), and plant height (164.16 cm) were recorded prominently in plots treated with inorganic fertilizer”
t0“on Sorghum”
Claim · model-written summary
Inorganic fertilizer produced maximum plant height of 164.16 cm.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum average grain yield (4640.40 kg ha -1 ) and total biomass (10879.60 kg ha -1 ), head weight (93.54 g), and plant height (164.16 cm) were recorded prominently in plots treated with inorganic fertilizer”
t0“on Sorghum”
Claim · model-written summary
Combined compost and inorganic fertilizer gave grain yield of 4537.80 kg ha -1.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of compost and inorganic fertilizer also gave remarkable grain (4537.80 kg ha -1 ) and biomass yields (10592.60 kg ha -1 )”
t0“on Sorghum”
Claim · model-written summary
Combined compost and inorganic fertilizer gave biomass yield of 10592.60 kg ha -1.
- Treatment
- combination of compost and inorganic fertilizere0
- Outcome
- biomass yieldse0
- Value
- 10592.60 kg ha -1e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combination of compost and inorganic fertilizer also gave remarkable grain (4537.80 kg ha -1 ) and biomass yields (10592.60 kg ha -1 )”
t0“on Sorghum”
Claim · model-written summary
Inorganic fertilizer reduced Striga population to 0.95 Striga m -2.
- Treatment
- application of inorganic fertilizerse0
- Outcome
- Striga populatione0
- Direction
- reducede0
- Value
- 0.95 Striga m -2e0
StrigaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Striga population reduced due to application of inorganic fertilizers (0.95 Striga m -2 )”
t0“on Sorghum”
Claim · model-written summary
Combined compost and inorganic fertilizer significantly reduced Striga to 1.17 Striga m -2.
- Treatment
- combination of compost and inorganic fertilizere0
- Outcome
- Strigae0
- Direction
- reductione0
- Value
- 1.17 Striga m -2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant reduction was also observed when plots were treated with the combination of compost and inorganic fertilizer (1.17 Striga m -2 )”
t0“on Sorghum”
Claim · model-written summary
Resistant sorghum Gubiye had fewer Striga, 1.24 per square metre, than farmers' practice at 2.37.
- Material
- Gubiyee0
- Treatment
- resistant sorghum varietye0
- Outcome
- number of Strigae0
- Direction
- lowe0
- Value
- 1.24e0
- Qualifier
- 2.37 Striga m -2e0
- Comparator
- farmers’ practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as compared to farmers’ practice (2.37 Striga m -2 ), low number of Striga m -2 (1.24) was recorded from resistant sorghum variety (Gubiye)”
Claim · model-written summary
Half compost and half inorganic fertilizer gave an optimum marginal return of 165.66%, above the 100% minimum.
- Treatment
- application of 50% compost + 50% inorganic fertilizerse0
- Outcome
- marginal rate of returne0
- Direction
- abovee0
- Value
- 165.66%e0
- Qualifier
- 100%e0
- Comparator
- minimum rate of returne0
Not reportedTaxon
Verbatim
e0“application of 50% compost + 50% inorganic fertilizers gave optimum marginal rate of return (MRR) (165.66%), which was above the minimum rate of return (100%)”
Claim · model-written summary
Integrated soil fertility management increased sorghum productivity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“productivity of sorghum is considerably higher when farmers use integrated soil fertility management options”
Claim · model-written summary
The authors recommend integrated use of 50% compost and 50% inorganic fertilizer as affordable management to increase yields and improve soil fertility.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“integrated use of 50% compost and 50% inorganic fertilizers should be recommended for farmers as they were affordable options for increasing sorghum yields with improving soil fertility in the small-scale farming systems of the study area”
Claim · model-written summary
Integrated organic and inorganic fertilizer reduced Striga seed density in soil.
- Treatment
- integrated use of organic and inorganic fertilizerse0
- Outcome
- seed density in the soile0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“integrated use of organic and inorganic fertilizers proved to be highly effective in terms of reducing Striga incidence both in terms of reduced seed density in the soil and decreased infection in sorghum”
Claim · model-written summary
Integrated organic and inorganic fertilizer decreased Striga infection in sorghum.
- Treatment
- integrated use of organic and inorganic fertilizerse0
- Outcome
- infection in sorghume0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“integrated use of organic and inorganic fertilizers proved to be highly effective in terms of reducing Striga incidence both in terms of reduced seed density in the soil and decreased infection in sorghum”
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