Abstract
Abstract Sorghum production is constrained by terminal drought stress in semi‐arid areas of north‐eastern Ethiopia. Data from field experiments conducted in the region for two consecutive years (2015 – 2016) were used to investigate the effect of potassium (K) and NPSBZn‐blended fertilizer (BF) inputs on the drought response of sorghum through analysis of gas exchange, dry matter accumulation and growth parameters. Leaf gas exchange properties varied strongly with K and BF application both under normal rainfall and drought conditions. Data taken at anthesis in drought‐exposed sorghum indicated reduction of net photosynthetic rate (A N ) with BF supply. A N declined from 15.7 µmol CO 2 /m 2 /s in the control to 13.4 µmol CO 2 /m 2 /s with application of 164 kg/ha BF. However, higher total dry matter yield was recorded at maturity in response to blended fertilizer and K inputs. Increasing supply of NPSBZn‐blended fertilizer was associated with declining leaf K content, increasing intercellular CO 2 concentration and water use efficiency (WUE) during anthesis. Significant variations in crop growth rates were also observed in response to K and BF inputs. At physiological maturity, net assimilation rate (NAR) increased with K and BF inputs both under drought and normal rainfall conditions. In general, K application modulated the response of sorghum to BF input under both normal rainfall and drought conditions. Therefore, grain sorghum could benefit from early supply of K and BF fertilizer in drought prone areas of Northeastern Ethiopia.
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 12
Claim · model-written summary
Potassium and blended fertilizer changed leaf gas exchange.
SorghumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf gas exchange properties varied strongly with K and BF application both under normal rainfall and drought conditions.”
t0“sorghum”
Claim · model-written summary
Blended fertilizer reduced photosynthetic rate during drought anthesis.
- Treatment
- 164 kg/ha BFe0
- Outcome
- CO2 exchanget0
- Direction
- declinede0
- Value
- 13.4 µmol CO 2 /m 2 /se0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A N declined from 15.7 µmol CO 2 /m 2 /s in the control to 13.4 µmol CO 2 /m 2 /s with application of 164 kg/ha BF.”
t0“CO2 exchange, dry matter accumulation and growth response of sorghum”
Claim · model-written summary
Blended fertilizer increased total dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher total dry matter yield was recorded at maturity in response to blended fertilizer and K inputs.”
t0“sorghum”
Claim · model-written summary
Potassium increased total dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher total dry matter yield was recorded at maturity in response to blended fertilizer and K inputs.”
t0“sorghum”
Claim · model-written summary
Increasing blended fertilizer was associated with lower leaf potassium.
- Treatment
- Increasing supply of NPSBZn‐blended fertilizere0
- Outcome
- leaf K contente0
- Direction
- declininge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing supply of NPSBZn‐blended fertilizer was associated with declining leaf K content”
t0“sorghum”
Claim · model-written summary
Increasing blended fertilizer was associated with higher intercellular carbon dioxide.
- Treatment
- Increasing supply of NPSBZn‐blended fertilizere0
- Outcome
- intercellular CO 2 concentratione0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing supply of NPSBZn‐blended fertilizer was associated with declining leaf K content, increasing intercellular CO 2 concentration and water use efficiency (WUE) during anthesis.”
t0“sorghum”
Claim · model-written summary
Increasing blended fertilizer was associated with higher water use efficiency.
- Treatment
- Increasing supply of NPSBZn‐blended fertilizere0
- Outcome
- water use efficiency (WUE)e0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing supply of NPSBZn‐blended fertilizer was associated with declining leaf K content, increasing intercellular CO 2 concentration and water use efficiency (WUE) during anthesis.”
t0“sorghum”
Claim · model-written summary
Crop growth rates varied significantly with potassium and blended fertilizer inputs.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant variations in crop growth rates were also observed in response to K and BF inputs.”
t0“sorghum”
Claim · model-written summary
Potassium increased net assimilation rate at maturity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At physiological maturity, net assimilation rate (NAR) increased with K and BF inputs both under drought and normal rainfall conditions.”
t0“sorghum”
Claim · model-written summary
Blended fertilizer increased net assimilation rate at maturity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At physiological maturity, net assimilation rate (NAR) increased with K and BF inputs both under drought and normal rainfall conditions.”
t0“sorghum”
Claim · model-written summary
Potassium modulated sorghum response to blended fertilizer.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“K application modulated the response of sorghum to BF input under both normal rainfall and drought conditions.”
Claim · model-written summary
The authors recommend early potassium and blended fertilizer supply in drought prone areas.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain sorghum could benefit from early supply of K and BF fertilizer in drought prone areas of Northeastern Ethiopia.”
The same questions in other papers
fertilization · yield · SorghumPositive and negative results
417 papers in the same direction as this paper · 21 in the opposite direction · 7 reporting no difference from an alternative
- positive
- no effect
- no effect
442 papers more in this group
See all 446 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.