Abstract
ABSTRACT Corrective phosphate application increases the levels of phosphorus (P) in the surface layer of the soil, stimulates plant root growth and increases the volume of soil exploited for water and nutrient uptake, which may reduce abiotic oxidative stress in sugarcane. The aim of this study was to evaluate the productivity and the response of the antioxidant enzyme system in sugarcane when grown in soil that received corrective phosphate application, using doses and sources of P of varying solubility. The experiment was conducted under field conditions in the southern Forest Zone of the State of Pernambuco, Brazil. The treatments were arranged in a randomised block design, in a (4 × 3) +1 factorial scheme with four replications. The factors consisted of a control (with no phosphate application) and the doses (50, 100, 200 and 300 kg P2O5 ha-1 ) and sources (reactive natural phosphate, triple superphosphate and sugarcane press mud) of P applied during the pre-planting stage of the plant cane cycle. The P content of the leaf tissue was considered adequate, and was not influenced by the phosphate application. Phosphate application at an estimated dose of 150 kg P2O5 ha-1 reduced antioxidant enzyme activity and increased shoot dry matter (SDM) by 25.0% and stalk productivity by 8.5%. Superoxide dismutase (SOD) showed the highest positive correlation coefficient with the other antioxidant enzymes, and a negative correlation with SDM, and can be used to evaluate abiotic stress that promotes reductions in sugarcane productivity.
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 7
Claim · model-written summary
Leaf phosphorus content was adequate and unaffected by phosphate application.
- Taxon
- sugarcanet0
- Treatment
- phosphate applicatione0
- Outcome
- P content of the leaf tissuee0
- Direction
- not influencede0
Not reportedComparator
Verbatim
e0“The P content of the leaf tissue was considered adequate, and was not influenced by the phosphate application.”
t0“sugarcane”
Claim · model-written summary
An estimated 150 kg P2O5 ha-1 reduced antioxidant enzyme activity.
- Taxon
- sugarcanet0
- Treatment
- Phosphate application at an estimated dose of 150 kg P2O5 ha-1e0
- Outcome
- antioxidant enzyme activitye0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Phosphate application at an estimated dose of 150 kg P2O5 ha-1 reduced antioxidant enzyme activity and increased shoot dry matter (SDM) by 25.0% and stalk productivity by 8.5%.”
t0“sugarcane”
Claim · model-written summary
Phosphate application increased sugarcane shoot dry matter by 25.0%.
- Taxon
- sugarcanet0
- Treatment
- Phosphate application at an estimated dose of 150 kg P2O5 ha-1e0
- Outcome
- shoot dry matter (SDM)e0
- Direction
- increasede0
- Value
- 25.0%e0
Not reportedComparator
Verbatim
e0“Phosphate application at an estimated dose of 150 kg P2O5 ha-1 reduced antioxidant enzyme activity and increased shoot dry matter (SDM) by 25.0% and stalk productivity by 8.5%.”
t0“sugarcane”
Claim · model-written summary
Phosphate application increased stalk productivity by 8.5%.
- Taxon
- sugarcanet0
- Treatment
- Phosphate application at an estimated dose of 150 kg P2O5 ha-1e0
- Outcome
- stalk productivitye0
- Direction
- increasede0
- Value
- 8.5%e0
Not reportedComparator
Verbatim
e0“Phosphate application at an estimated dose of 150 kg P2O5 ha-1 reduced antioxidant enzyme activity and increased shoot dry matter (SDM) by 25.0% and stalk productivity by 8.5%.”
t0“sugarcane”
Claim · model-written summary
Superoxide dismutase was positively correlated with other antioxidant enzymes.
Verbatim
e0“Superoxide dismutase (SOD) showed the highest positive correlation coefficient with the other antioxidant enzymes”
t0“sugarcane”
Claim · model-written summary
Superoxide dismutase was negatively correlated with shoot dry matter.
Verbatim
e0“Superoxide dismutase (SOD) showed the highest positive correlation coefficient with the other antioxidant enzymes, and a negative correlation with SDM”
t0“sugarcane”
Claim · model-written summary
The authors propose SOD to evaluate stress associated with reduced sugarcane productivity.
Verbatim
e0“can be used to evaluate abiotic stress that promotes reductions in sugarcane productivity”
The same questions in other papers
phosphorus · nutrient: content · Saccharum officinarum (sugarcane)Results differ
14 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 papers →phosphorus · growth · Saccharum officinarum (sugarcane)Positive and negative results
22 papers in the same direction as this paper · 3 in the opposite direction
- positive
- negative
- no effect
22 papers more in this group
See all 26 papers →phosphorus · yield · Saccharum officinarum (sugarcane)Positive and negative results
54 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
53 papers more in this group
See all 57 papers →phosphorus · soil: biology · Saccharum officinarum (sugarcane)Results agree
1 paper in the same direction as this paper
- positive
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.