Abstract
The adaptability of cassava to low fertile and marginal soils facilitates its production in subsistent agriculture. As a result, smallholder farmers rarely apply fertilizers. The current yield gap is therefore very large, calling for application of fertilizers and soil amendments to improve its productivity. Field experiments were carried out to assess the potential of partially substituting Phosphorus (P) fertilizers by in vitro-produced arbuscular mycorrhizal fungal (AMF) inoculants in cassava production in two agro-ecologies of Nigeria: Northern Guinea Savanna (Samaru) and Sudan Savanna (Minjibir). The experiments were laid out in a split plot design with P levels (0, 17.5, 35 and 52.5 kg P2O5 ha-1) as main plot and AMF inoculants (Control, Glomygel, Glomygel carrier, Mycodrip, Mycodrip carrier) as subplots. The results in Samaru showed that there was significant interaction between AMF and P in root fresh weight, total biomass and root to shoot ratio. The root fresh weights of the inoculated cassava increased proportionally with application of P. However, highest root fresh weight of cassava inoculated with Glomygel was observed at 35 kg P2O5 ha-1 recording 25% yield increase compared to 52.5 kg P2O5 ha-1 application. Interestingly, Cassava inoculated with Glomygel at 17.5 kg P2O5 ha-1 gave root fresh yield statistically similar to where 35 kg P2O5 ha-1 was applied. This represented a 50% reduction in P fertilizer use. Also, cassava inoculated with Glomygel increased leaf nutrient concentrations, which strongly correlated with the root fresh yield. However, no effects of inoculant carriers were observed in yield and nutrient concentrations. Contrarily, there was no significant treatment effect in Minjibir for nearly all the measured parameters. Cassava yield was however, higher in Minjibir than Samaru probably due to soil fertility and structural differences, which resulted in few observable effects of AMF and P treatments at Minjibir. We conclude that under low P conditions inoculation with in vitro produced AMF inoculants could be employed to reduce P fertilizer requirements for cassava and improve yields, but the variability of the responses as a result of soil heterogeneity and the identity of the fungal strain in the inoculant require further investigations before recommending the practice.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
At Samaru, AMF and P interacted significantly for root fresh weight, total biomass, and root-to-shoot ratio.
- Taxon
- cassava
Manihot esculentat0 - Treatment
- AMF and Pe0
- Interactor
- AMFe0symbiont
- Outcome
- root fresh weight, total biomass and root to shoot ratioe0
- Setting
- Samarue0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results in Samaru showed that there was significant interaction between AMF and P in root fresh weight, total biomass and root to shoot ratio.”
t0“cassava”
Claim · model-written summary
Cassava root fresh weight increased proportionally with P application after inoculation.
- Taxon
- cassavaManihot esculentae0
- Treatment
- application of Pe0
- Interactor
- AMFe1symbiont
- Outcome
- root fresh weightse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root fresh weights of the inoculated cassava increased proportionally with application of P.”
e1“arbuscular mycorrhizal fungal (AMF) inoculants”
Claim · model-written summary
Glomygel-inoculated cassava at 35 kg P2O5 ha-1 had the highest root fresh weight and 25% more yield than at 52.5 kg P2O5 ha-1.
- Taxon
- cassavaManihot esculentae0
- Treatment
- Glomygele0
- Interactor
- AMFe1symbiont
- Outcome
- root fresh weighte0
- Direction
- higheste0
- Value
- 25%e0
- Qualifier
- 35 kg P2O5 ha-1e0
- Comparator
- 52.5 kg P2O5 ha-1 applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest root fresh weight of cassava inoculated with Glomygel was observed at 35 kg P2O5 ha-1 recording 25% yield increase compared to 52.5 kg P2O5 ha-1 application”
e1“arbuscular mycorrhizal fungal (AMF) inoculants”
Claim · model-written summary
With Glomygel, root fresh yield at 17.5 kg P2O5 ha-1 was statistically similar to yield at 35 kg P2O5 ha-1.
- Taxon
- CassavaManihot esculentae0
- Treatment
- Glomygel at 17.5 kg P2O5 ha-1e0
- Interactor
- AMFe1symbiont
- Outcome
- root fresh yielde0
- Direction
- statistically similare0
- Comparator
- 35 kg P2O5 ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava inoculated with Glomygel at 17.5 kg P2O5 ha-1 gave root fresh yield statistically similar to where 35 kg P2O5 ha-1 was applied.”
e1“arbuscular mycorrhizal fungal (AMF) inoculants”
Claim · model-written summary
The comparable yield with Glomygel represented a 50% reduction in P fertilizer use.
- Taxon
- CassavaManihot esculentae1
- Treatment
- Glomygele1
- Interactor
- AMFe2symbiont
- Outcome
- reduction in P fertilizer usee0
- Direction
- reductione0
- Value
- 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This represented a 50% reduction in P fertilizer use.”
e1“Cassava inoculated with Glomygel at 17.5 kg P2O5 ha-1”
e2“arbuscular mycorrhizal fungal (AMF) inoculants”
Claim · model-written summary
Glomygel inoculation increased cassava leaf nutrient concentrations.
- Taxon
- cassavaManihot esculentae0
- Treatment
- inoculated with Glomygele0
- Interactor
- AMFe1symbiont
- Outcome
- leaf nutrient concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cassava inoculated with Glomygel increased leaf nutrient concentrations”
e1“arbuscular mycorrhizal fungal (AMF) inoculants”
Claim · model-written summary
Cassava leaf nutrient concentrations strongly correlated with root fresh yield.
- Taxon
- cassavaManihot esculentae1
- Organ / stage
- leafe0
- Outcome
- root fresh yielde0
- Qualifier
- leaf nutrient concentrationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf nutrient concentrations, which strongly correlated with the root fresh yield”
e1“cassava inoculated with Glomygel increased leaf nutrient concentrations”
Claim · model-written summary
Inoculant carriers had no observed effect on yield or nutrient concentrations.
- Taxon
- cassavaManihot esculentat0
- Treatment
- inoculant carrierse0
- Outcome
- yield and nutrient concentrationse0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no effects of inoculant carriers were observed in yield and nutrient concentrations”
t0“cassava”
Claim · model-written summary
At Minjibir, treatments had no significant effect on nearly all measured parameters.
- Taxon
- cassavaManihot esculentat0
- Treatment
- AMF and P treatmentse1
- Interactor
- AMFe1symbiont
- Outcome
- nearly all the measured parameterse0
- Direction
- no significant treatment effecte0
- Setting
- Minjibire0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no significant treatment effect in Minjibir for nearly all the measured parameters”
e1“AMF and P treatments”
t0“cassava”
Claim · model-written summary
Cassava yield was higher in Minjibir than Samaru.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava yield was however, higher in Minjibir than Samaru”
Claim · model-written summary
The authors conclude that AMF inoculation under low P could reduce fertilizer requirements and improve cassava yields.
- Taxon
- cassavaManihot esculentae0
- Treatment
- inoculation with in vitro produced AMF inoculantse0
- Interactor
- AMFe0symbiont
- Outcome
- reduce P fertilizer requirements for cassava and improve yieldse0
- Qualifier
- under low P conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under low P conditions inoculation with in vitro produced AMF inoculants could be employed to reduce P fertilizer requirements for cassava and improve yields”
Claim · model-written summary
The authors call for investigation of soil heterogeneity and inoculant strain identity before recommending AMF use.
- Taxon
- cassavaManihot esculentat0
- Outcome
- further investigations before recommending the practicee0
- Qualifier
- soil heterogeneity and the identity of the fungal strain in the inoculante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the variability of the responses as a result of soil heterogeneity and the identity of the fungal strain in the inoculant require further investigations before recommending the practice”
t0“cassava”
The same questions in other papers
inoculation · yield · Manihot esculenta (cassava)Positive and negative results
1 paper in the same direction as this paper · 17 in the opposite direction
- positive
- positive
- positive
15 papers more in this group
See all 19 papers →phosphorus · yield · Manihot esculenta (cassava)Positive and negative results
17 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- negative
16 papers more in this group
See all 20 papers →inoculation · nutrient: content · Manihot esculenta (cassava)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.