Abstract
Nitrogen (N) fertilization is important for sugarcane crops, for both agronomic and environmental reasons. Better use of N from fertilizer is required for crop management, and in order to achieve it, adequate N nutrition monitoring is necessary. Sap extract analysis is a sensitive technique that has been adopted in other crops to tackle this objective, and can be used for sugarcane. The aim of this study was to evaluate the behavior of N and the response of sugarcane after N fertilization, using sap and leaf tissue analysis. The study was undertaken in two experimental areas in 2012/2013 season, using ratoon cane, following application of 0, 50, 100, and 150 kg·ha-1 of N. The youngest visible leaves were sampled from sugarcane at five time points between 0 and 150 days after fertilization, to evaluate the nitrate, ammonium, and total N content of sap extract, and total N content of leaf tissue. At the first sampling point (30 days after N fertilizer application), mineral N in sap increased as a result of N fertilization in medium-textured soil, and remained high until 120 days after fertilization in clayey soil. The total N content of sap followed a similar behavior. Stalk yield was only observed to increase in sugarcane grown in the clayey soil. Sap analysis proved to be an efficient method for monitoring N status in sugarcane grown in different soil types.
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Claims 5
Claim · model-written summary
N fertilization increased mineral N in sap at 30 days in medium-textured soil.
- Taxon
- sugarcanet0
- Treatment
- N fertilizatione0
- Outcome
- mineral N in sape0
- Direction
- increasede0
- Qualifier
- 30 days after N fertilizer applicatione0
- Setting
- medium-textured soile0
Not reportedComparator
Verbatim
e0“At the first sampling point (30 days after N fertilizer application), mineral N in sap increased as a result of N fertilization in medium-textured soil”
t0“Sugarcane”
Claim · model-written summary
Mineral N in sugarcane sap remained high until 120 days after fertilization in clayey soil.
Verbatim
e0“and remained high until 120 days after fertilization in clayey soil”
t0“Sugarcane”
e1“mineral N in sap”
Claim · model-written summary
Total N content of sap followed the mineral N response.
Verbatim
e0“The total N content of sap followed a similar behavior”
t0“Sugarcane”
Claim · model-written summary
N fertilization increased stalk yield only in clayey soil.
- Taxon
- sugarcanee0
- Treatment
- N fertilizatione1
- Outcome
- Stalk yielde0
- Direction
- increasee0
- Setting
- clayey soile0
Not reportedComparator
Verbatim
e0“Stalk yield was only observed to increase in sugarcane grown in the clayey soil”
e1“response of sugarcane after N fertilization”
Claim · model-written summary
Sap analysis efficiently monitored sugarcane N status across soil types.
Not reportedComparatorValue
Verbatim
e0“Sap analysis proved to be an efficient method for monitoring N status in sugarcane grown in different soil types”
The same questions in other papers
fertilization · yield · Saccharum officinarum (sugarcane)Positive and negative results
311 papers in the same direction as this paper · 28 in the opposite direction · 6 reporting no difference from an alternative
- positive
- no effect
- negative
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