Abstract
High fertilizer application and over-irrigation in sugarcane systems can cause considerable N2O emissions. Optimized water-fertilization management which reduces N2O emissions, while maintaining sugarcane biomass, is crucial, but may affect nitrogen fixation by sugarcane. This study evaluated the combined effect of water-fertilization on sugarcane biomass and nitrogen fixation in field trials in southern China. Treatments included drip and spray irrigation, with three levels (0% (low), 50% (medium), 100% (high)) of irrigation and of fertilizer. A rain-fed crop (no irrigation or fertilizer) was included as the control. The results showed that (1) spray irrigation with medium water and high fertilization increased biomass. The optimum combination in sugarcane elongation stage was drip irrigation with medium water and high fertilization, while drip irrigation with high water and high fertilization was the best choice for maturity stage. (2) For sugarcane nitrogen (δ15N) content, spray irrigation with medium water and high fertilization was the best combination in seedling and tillering stages. The optimum combination in the elongation stage was drip irrigation with medium water and high fertilization, and in maturity stage was drip irrigation with high water and high fertilization. (3) For soil (δ15N content), drip irrigation with high water and high fertilization proved optimal for seedling, tillering, and maturity stages. (4) In seedling stage, sugarcane (δ15N content) was found to be strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivity. Soil (δ15N content) was correlated with photosynthesis and soil temperature. In conclusion, drip irrigation appears most suitable for field planting, while the best treatment in seedling and tillering stages is medium water-high fertilization, and that the best in elongation stage is high water-medium fertilization. The optimum water-fertilizer combinations identified here can provide a scientific basis for optimization and management of irrigation and fertilization in China and other regions with similar environments.
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 12
Claim · model-written summary
Medium water and high fertilizer under spray irrigation increased sugarcane biomass.
- Taxon
- sugarcanet0
- Treatment
- spray irrigation with medium water and high fertilizatione0
- Outcome
- biomasse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“spray irrigation with medium water and high fertilization increased biomass.”
t0“Sugarcane”
Claim · model-written summary
Medium water and high fertilizer under drip irrigation was optimal for biomass at elongation.
- Taxon
- sugarcanee0
- Organ / stage
- elongation stagee0
- Treatment
- drip irrigation with medium water and high fertilizatione0
- Outcome
- optimum combinatione0
- Direction
- optimume0
Not reportedComparator
Verbatim
e0“The optimum combination in sugarcane elongation stage was drip irrigation with medium water and high fertilization”
Claim · model-written summary
High water and high fertilizer under drip irrigation was best for biomass at maturity.
- Taxon
- sugarcanet0
- Organ / stage
- maturity stagee0
- Treatment
- drip irrigation with high water and high fertilizatione0
- Outcome
- best choicee0
- Direction
- beste0
Not reportedComparator
Verbatim
e0“drip irrigation with high water and high fertilization was the best choice for maturity stage.”
t0“Sugarcane”
Claim · model-written summary
Spray irrigation with medium water and high fertilizer was best for sugarcane δ15N in seedling and tillering stages.
- Taxon
- sugarcanee0
- Organ / stage
- seedling and tillering stagese0
- Treatment
- spray irrigation with medium water and high fertilizatione0
- Outcome
- nitrogen (δ15N) contente0
- Direction
- beste0
Not reportedComparator
Verbatim
e0“For sugarcane nitrogen (δ15N) content, spray irrigation with medium water and high fertilization was the best combination in seedling and tillering stages.”
Claim · model-written summary
Drip irrigation with medium water and high fertilizer was optimal for sugarcane δ15N at elongation.
- Taxon
- sugarcanet0
- Organ / stage
- elongation stagee0
- Treatment
- drip irrigation with medium water and high fertilizatione0
- Outcome
- optimum combinatione0
- Direction
- optimume0
Not reportedComparator
Verbatim
e0“The optimum combination in the elongation stage was drip irrigation with medium water and high fertilization”
t0“Sugarcane”
Claim · model-written summary
Drip irrigation with high water and high fertilizer was optimal for sugarcane δ15N at maturity.
- Taxon
- sugarcanet0
- Organ / stage
- maturity stagee0
- Treatment
- drip irrigation with high water and high fertilizatione0
- Outcome
- drip irrigation with high water and high fertilizatione0
Not reportedComparatorDirection
Verbatim
e0“in maturity stage was drip irrigation with high water and high fertilization.”
t0“Sugarcane”
Claim · model-written summary
Drip irrigation with high water and high fertilizer was optimal for soil δ15N at seedling, tillering and maturity stages.
- Taxon
- sugarcanet0
- Treatment
- drip irrigation with high water and high fertilizatione0
- Outcome
- soil (δ15N content)e0
- Direction
- optimale0
Not reportedComparator
Verbatim
e0“For soil (δ15N content), drip irrigation with high water and high fertilization proved optimal for seedling, tillering, and maturity stages.”
t0“Sugarcane”
Claim · model-written summary
Sugarcane δ15N content was strongly correlated with leaf area index, soil water, soil temperature and conductivity at seedling stage.
- Taxon
- sugarcanee0
- Organ / stage
- seedling stagee0
- Outcome
- sugarcane (δ15N content)e0
- Qualifier
- strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivitye0
Not reportedDirection
Verbatim
e0“In seedling stage, sugarcane (δ15N content) was found to be strongly correlated with leaf area index, soil water, soil temperature, and soil electrical conductivity.”
Claim · model-written summary
Soil δ15N content correlated with photosynthesis and soil temperature.
- Taxon
- sugarcanet0
- Outcome
- Soil (δ15N content)e0
- Qualifier
- correlated with photosynthesis and soil temperaturee0
- Setting
- soil temperaturee0
Not reportedDirection
Verbatim
e0“Soil (δ15N content) was correlated with photosynthesis and soil temperature.”
t0“Sugarcane”
Claim · model-written summary
The authors recommended drip irrigation for field planting.
Verbatim
e0“In conclusion, drip irrigation appears most suitable for field planting”
t0“Sugarcane”
Claim · model-written summary
The authors recommended medium water and high fertilizer at seedling and tillering stages.
Verbatim
e0“the best treatment in seedling and tillering stages is medium water-high fertilization”
t0“Sugarcane”
Claim · model-written summary
The authors recommended high water and medium fertilizer at elongation.
Verbatim
e0“the best in elongation stage is high water-medium fertilization.”
t0“Sugarcane”
The same questions in other papers
application · growth · Saccharum officinarum (sugarcane)Positive and negative results
41 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
45 papers more in this group
See all 49 papers →irrigation · growth · Saccharum officinarum (sugarcane)Positive and negative results
46 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- negative
50 papers more in this group
See all 54 papers →in vitro · growth · Saccharum officinarum (sugarcane)Positive and negative results
58 papers in the same direction as this paper · 8 in the opposite direction
- negative
- negative
- negative
63 papers more in this group
See all 67 papers →fertilization · growth · Saccharum officinarum (sugarcane)Positive and negative results
128 papers in the same direction as this paper · 14 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- no effect
143 papers more in this group
See all 147 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.