Abstract
Access to Water and Nitrogen (N) are key challenges in potato crop management that could be optimized through understanding related agronomic and physiological traits. The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16, chosen for their short vegetative period (90–-110 days) and tolerance to water deficit. Nitrogen Use Efficiency (NUE) was greatly reduced in all genotypes under drought, even dropping to nearly zero. Despite this, the tuber yield and total biomass reduction of around 50 % for all genotypes could be alleviated with N application. Normalized Difference Vegetation Index (NDVI), chlorophyll content (SPAD), and Canopy cover (CC) were found to be good indicators for predicting nitrogen deficits and detecting early stress by drought. Overall, each genotype had different strategies to manage N and cope with drought stress. UNICA was the most efficient genotype at using the N present in the soil and tolerating drought stress, while Achirana-INTA was most affected by drought in terms of NUE. Based on the results, it is suggested that maximum fertilizer use efficiency can be obtained with low N rates applied under well-watered conditions. Improved NUE and a greater understanding of the physiological response of crops to drought stress and N fertilization will help to reduce fertilizer use, lessening the effects of water contamination and improving input efficiency.
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Claims 7
Claim · model-written summary
Drought greatly reduced nitrogen use efficiency in all potato genotypes, nearly to zero.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- droughte1
- Outcome
- Nitrogen Use Efficiency (NUE)e1
- Direction
- greatly reducede1
- Qualifier
- even dropping to nearly zeroe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e1“Nitrogen Use Efficiency (NUE) was greatly reduced in all genotypes under drought, even dropping to nearly zero”
Claim · model-written summary
Drought reduced tuber yield and total biomass by around 50 % in all potato genotypes.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- water deficite0
- Outcome
- tuber yield and total biomasse2
- Direction
- reductione2
- Value
- around 50 %e2
- Qualifier
- for all genotypese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e2“Despite this, the tuber yield and total biomass reduction of around 50 % for all genotypes could be alleviated with N application”
Claim · model-written summary
Nitrogen application could alleviate the drought-induced reduction in tuber yield and total biomass.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- N applicatione2
- Outcome
- tuber yield and total biomass reductione2
- Direction
- alleviatede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e2“Despite this, the tuber yield and total biomass reduction of around 50 % for all genotypes could be alleviated with N application”
Claim · model-written summary
NDVI, chlorophyll content (SPAD) and canopy cover are good indicators for predicting nitrogen deficits and detecting early drought stress in potato.
- Taxon
- potatoSolanum tuberosume0
- Outcome
- predicting nitrogen deficits and detecting early stress by droughte3
- Qualifier
- good indicatorse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e3“Normalized Difference Vegetation Index (NDVI), chlorophyll content (SPAD), and Canopy cover (CC) were found to be good indicators for predicting nitrogen deficits and detecting early stress by drought”
Claim · model-written summary
UNICA was the most efficient potato genotype at using soil nitrogen and tolerating drought.
- Taxon
- potatoSolanum tuberosume0
- Material
- UNICAe4
- Outcome
- using the N present in the soil and tolerating drought stresse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e4“UNICA was the most efficient genotype at using the N present in the soil and tolerating drought stress”
Claim · model-written summary
Achirana-INTA was the potato genotype most affected by drought in terms of NUE.
- Taxon
- potatoSolanum tuberosume0
- Material
- Achirana-INTAe5
- Outcome
- NUEe5
- Direction
- most affectede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e5“Achirana-INTA was most affected by drought in terms of NUE”
Claim · model-written summary
The authors suggest that maximum fertilizer use efficiency can be obtained with low N rates under well-watered conditions.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- low N ratese6
- Outcome
- maximum fertilizer use efficiencye6
- Qualifier
- well-watered conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to water deficit and two levels of nitrogen (0 and 200 kg N.ha-1) were assessed here for agronomic and physiological traits for potato genotypes UNICA, Achirana-INTA, and CIP397077.16”
e6“it is suggested that maximum fertilizer use efficiency can be obtained with low N rates applied under well-watered conditions”
The same questions in other papers
drought · yield · Solanum tuberosum (potato)Results differ
36 papers in the same direction as this paper · 10 in the opposite direction
- negative
- negative
- negative
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See all 47 papers →nitrogen · yield · Solanum tuberosum (potato)Results differ
108 papers in the same direction as this paper · 20 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- negative
128 papers more in this group
See all 132 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.