Abstract
Background and Objective: In order to address the inadequacy of the current blanket fertilizer recommendation in the Guinea Savanna of Nigeria, the effect of other nutrients in addition to N, P and K in limiting maize productivity must be assessed. This study aimed to quantify the effects of the addition of secondary macronutrients and micronutrients on maize grain yield, nutrient uptake and N, P and K use efficiencies in the Guinea Savannah of Nigeria. Materials and Methods: The experiment consisted of 12 treatments: A control, an NPK treatment and 10 other treatments in which secondary macronutrient (Mg, S) and/or micronutrients (B, Zn) (SMNs) were added to the NPK. These were set across 4 locations with 3 replications. Results: Maize yield response to the addition of SMNs showed wide variation. The highest yield advantage over recommended NPK fertilizers was highest with the addition of Mg in Lere (2.4 t ha–1), S+B+Zn in Faskari (2.8 t ha–1), S+B in Doguwa (1.5 t ha–1) and S+Zn in Toro (2.4 t ha–1). The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs but were not improved with Zn application beyond NPK alone. Conclusion: These results indicated that nutrient limitations to maize in the Guinea Savannah go beyond N, P and K. Therefore, S, Mg and B are needed to improve maize productivity and engender improved use efficiencies of NPK fertilizers.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 10
Claim · model-written summary
Adding Mg over recommended NPK gave the highest maize yield advantage in Lere, 2.4 t ha–1.
- Treatment
- addition of Mge0
- Outcome
- yield advantagee0
- Direction
- higheste0
- Value
- 2.4 t ha–1e0
- Comparator
- recommended NPK fertilizerse0
- Setting
- Leree0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield advantage over recommended NPK fertilizers was highest with the addition of Mg in Lere (2.4 t ha–1)”
t0“Maize”
Claim · model-written summary
Adding S+B+Zn over recommended NPK gave the highest maize yield advantage in Faskari, 2.8 t ha–1.
- Treatment
- S+B+Zne0
- Outcome
- yield advantagee0
- Direction
- higheste0
- Value
- 2.8 t ha–1e0
- Comparator
- recommended NPK fertilizerse0
- Setting
- Faskarie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield advantage over recommended NPK fertilizers was highest with the addition of Mg in Lere (2.4 t ha–1), S+B+Zn in Faskari (2.8 t ha–1)”
t0“Maize”
Claim · model-written summary
Adding S+B over recommended NPK gave the highest maize yield advantage in Doguwa, 1.5 t ha–1.
- Treatment
- S+Be0
- Outcome
- yield advantagee0
- Direction
- higheste0
- Value
- 1.5 t ha–1e0
- Comparator
- recommended NPK fertilizerse0
- Setting
- Doguwae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield advantage over recommended NPK fertilizers was highest with the addition of Mg in Lere (2.4 t ha–1), S+B+Zn in Faskari (2.8 t ha–1), S+B in Doguwa (1.5 t ha–1)”
t0“Maize”
Claim · model-written summary
Adding S+Zn over recommended NPK gave the highest maize yield advantage in Toro, 2.4 t ha–1.
- Treatment
- S+Zne0
- Outcome
- yield advantagee0
- Direction
- higheste0
- Value
- 2.4 t ha–1e0
- Comparator
- recommended NPK fertilizerse0
- Setting
- Toroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield advantage over recommended NPK fertilizers was highest with the addition of Mg in Lere (2.4 t ha–1), S+B+Zn in Faskari (2.8 t ha–1), S+B in Doguwa (1.5 t ha–1) and S+Zn in Toro (2.4 t ha–1)”
t0“Maize”
Claim · model-written summary
Adding SMNs significantly increased N, P and K uptake.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs”
e1“maize grain yield”
Claim · model-written summary
Adding SMNs significantly increased N, P and K agronomic use efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs”
e1“maize grain yield”
Claim · model-written summary
Adding SMNs significantly increased N, P and K internal utilization efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs”
e1“maize grain yield”
Claim · model-written summary
Adding SMNs significantly increased N, P and K apparent recovery efficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs”
e1“maize grain yield”
Claim · model-written summary
Zn application did not improve N, P and K uptake or use efficiencies beyond NPK alone.
- Treatment
- Zn applicatione0
- Outcome
- uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and Ke0
- Direction
- not improvede0
- Comparator
- NPK alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake, agronomic use efficiency, internal utilization efficiency and apparent recovery efficiency of N, P and K were significantly increased with the addition of SMNs but were not improved with Zn application beyond NPK alone”
e1“maize grain yield”
Claim · model-written summary
The authors conclude that S, Mg and B are needed to improve maize productivity and NPK fertilizer use efficiencies.
- Treatment
- S, Mg and Be0
- Outcome
- improve maize productivity and engender improved use efficiencies of NPK fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S, Mg and B are needed to improve maize productivity and engender improved use efficiencies of NPK fertilizers”
The same questions in other papers
magnesium atom · yield · Zea mays (maize)Results differ
35 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
43 papers more in this group
See all 47 papers →zinc atom · nutrient: content · Zea mays (maize)Results differ
35 papers in the same direction as this paper · 199 reporting no difference from an alternative
- positive
- positive
- positive
231 papers more in this group
See all 235 papers →zinc atom · yield · Zea mays (maize)Results differ
390 papers in the same direction as this paper · 47 in the opposite direction · 3 reporting no difference from an alternative
- positive
- positive
- negative
437 papers more in this group
See all 441 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.