Abstract
Abstract The effects of varied amounts of fertilization on yield, fruit quality, and nitrogen (N) uptake of muskmelons (Cucumis melo L. var reticulatus Naud) grown under both organic and conventional farming conditions were evaluated. Organic fertilizer (0.0, 0.55, 1.1, and 2.2 kg m−2) and mineral fertilizers containing the same amounts of estimated plant available nutrients [N, phosphorus (P), and potassium (K)] were applied to organic and conventional farming plots, respectively, in both the spring and autumn seasons of 2005. In comparison to conventional farming conditions, muskmelons grown under organic farming conditions had the same yield, total soluble solids (TSS) and soluble sugar contents in both growing seasons, and fruit pulp nitrate content was significantly reduced by 12% on average in spring and 16% on average in autumn. At harvest maturity the aboveground plant N concentration was significantly higher in the conventional treatments than in the organic treatments. At the vine growth stage, the plant N concentrations were similar in all treatments in both seasons. The ratios of nitrate N to total N amount in aboveground biomass were higher in conventional and high fertilized organic treatments than in low or not fertilized organic treatments under limited N supply from the soil. Muskmelon plants absorbed mainly inorganic N, and the protein N fraction in the xylem sap was larger than the amino acid N fraction. Plants grown in the organic system had a higher proportion of organic N in their xylem sap, especially when manure input was low. Keywords: muskmelonyieldqualitynitrogennitrateorganic farmingfertilization ACKNOWLEDGMENTS This work was supported by grants from the China Postdoctoral Science Foundation (No. 2005038436) and the National High Technology Research and Development Program of China (863 Program) (No. 2006AA10Z221).
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Claims 9
Claim · model-written summary
Organic and conventional muskmelons had the same yield, soluble solids and sugar contents in both seasons.
- Taxon
- muskmelons
.jpg?width=60)
Cucumis meloe0 - Treatment
- organic farming conditionse0
- Outcome
- yield, total soluble solids (TSS) and soluble sugar contentse0
- Direction
- samee0
- Comparator
- conventional farming conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“In comparison to conventional farming conditions, muskmelons grown under organic farming conditions had the same yield, total soluble solids (TSS) and soluble sugar contents in both growing seasons, and fruit pulp nitrate content was significantly reduced by 12% on average in spring and 16% on average in autumn”
Claim · model-written summary
Organic production reduced spring fruit pulp nitrate by 12% on average.
- Taxon
- muskmelonsCucumis meloe0
- Treatment
- organic farming conditionse0
- Outcome
- fruit pulp nitrate contente0
- Direction
- reducede0
- Value
- 12%e0
- Qualifier
- springe0
- Comparator
- conventional farming conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison to conventional farming conditions, muskmelons grown under organic farming conditions had the same yield, total soluble solids (TSS) and soluble sugar contents in both growing seasons, and fruit pulp nitrate content was significantly reduced by 12% on average in spring and 16% on average in autumn”
Claim · model-written summary
Organic production reduced autumn fruit pulp nitrate by 16% on average.
- Taxon
- muskmelonsCucumis meloe0
- Treatment
- organic farming conditionse0
- Outcome
- fruit pulp nitrate contente0
- Direction
- reducede0
- Value
- 16%e0
- Qualifier
- autumne0
- Comparator
- conventional farming conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In comparison to conventional farming conditions, muskmelons grown under organic farming conditions had the same yield, total soluble solids (TSS) and soluble sugar contents in both growing seasons, and fruit pulp nitrate content was significantly reduced by 12% on average in spring and 16% on average in autumn”
Claim · model-written summary
Conventional production yielded higher aboveground nitrogen concentration at harvest than organic production.
- Taxon
- MUSKMELONCucumis melot0
- Organ / stage
- harvest maturitye0
- Treatment
- conventional treatmentse0
- Outcome
- aboveground plant N concentratione0
- Direction
- highere0
- Comparator
- organic treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At harvest maturity the aboveground plant N concentration was significantly higher in the conventional treatments than in the organic treatments”
t0“MUSKMELON”
Claim · model-written summary
Plant nitrogen concentrations were similar across treatments at vine growth in both seasons.
- Taxon
- MUSKMELONCucumis melot0
- Organ / stage
- vine growth stagee0
- Outcome
- plant N concentrationse0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the vine growth stage, the plant N concentrations were similar in all treatments in both seasons”
t0“MUSKMELON”
Claim · model-written summary
The nitrate-to-total nitrogen ratio was higher with conventional and high organic fertilization than low or no organic fertilization under limited soil N.
- Taxon
- MUSKMELONCucumis melot0
- Treatment
- conventional and high fertilized organic treatmentse0
- Outcome
- ratios of nitrate N to total N amount in aboveground biomasse0
- Direction
- highere0
- Qualifier
- limited N supply from the soile0
- Comparator
- low or not fertilized organic treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratios of nitrate N to total N amount in aboveground biomass were higher in conventional and high fertilized organic treatments than in low or not fertilized organic treatments under limited N supply from the soil”
t0“MUSKMELON”
Claim · model-written summary
Muskmelon absorbed mainly inorganic nitrogen.
- Taxon
- MuskmelonCucumis meloe0
- Outcome
- absorbed mainly inorganic Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon plants absorbed mainly inorganic N, and the protein N fraction in the xylem sap was larger than the amino acid N fraction”
Claim · model-written summary
The protein N fraction exceeded the amino acid N fraction in muskmelon xylem sap.
- Taxon
- MuskmelonCucumis meloe0
- Outcome
- protein N fraction in the xylem sape0
- Direction
- largere0
- Comparator
- amino acid N fractione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Muskmelon plants absorbed mainly inorganic N, and the protein N fraction in the xylem sap was larger than the amino acid N fraction”
Claim · model-written summary
Organic production increased the proportion of organic nitrogen in xylem sap, especially with low manure input.
- Taxon
- MUSKMELONCucumis melot0
- Treatment
- organic systeme0
- Outcome
- proportion of organic N in their xylem sape0
- Direction
- highere0
- Qualifier
- manure input was lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants grown in the organic system had a higher proportion of organic N in their xylem sap, especially when manure input was low”
t0“MUSKMELON”
The same questions in other papers
cultivation system · nutrient: content · Cucumis melo (muskmelon)Results agree
2 papers in the same direction as this paper
- positive
- 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.