Abstract
Nitrogen fertilizers are widely applied to increase rice yields, but excessive fertilization poses an environmental risk. It has been shown that rice-duck farming can be more efficient in terms of N use by improving rice growth. Several pathways have been proposed for how ducks may improve rice growth in paddy fields. The aim of this study was to investigate the isolated effect of rice-duck farm soil on rice, namely the N content in different plant organs and whether it differs among rice varieties. In a 116-day greenhouse pot experiment, six different Japonica rice varieties (JinU99, Jinyuan98, Jindao18, Jinyuan89, Jinhei1 and Jindao201) were grown in fertilized duck and no-duck soil after which the N content in their organs and the numbers of surviving and grain-producing plants were compared. The straw and leaf N concentrations were positively influenced by rice-duck farm soil while in the roots, this effect was recorded in only two rice varieties. Grain N content differed among varieties, but was not significantly influenced by soil type. Overall, N concentrations in straw and leaf, and roots of some rice varieties, but not in grain grown on duck soil were higher than that in those grown in soils not influenced by rice-duck farming. This study for the first time demonstrates that rice-duck farm soil alone can influence rice growth, namely an increase in the N content of certain rice plant organs.
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Claims 4
Claim · model-written summary
Duck farm soil increased straw and leaf nitrogen concentrations.
- Taxon
- japonica rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupt0 - Treatment
- rice-duck farm soile0
- Outcome
- straw and leaf N concentrationse0
- Direction
- positively influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
e0“The straw and leaf N concentrations were positively influenced by rice-duck farm soil while in the roots, this effect was recorded in only two rice varieties.”
t0“japonica rice”
Claim · model-written summary
Duck farm soil increased root nitrogen in only two varieties.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- rice-duck farm soile0
- Outcome
- rootse0
- Direction
- positively influencede0
- Qualifier
- only two rice varietiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The straw and leaf N concentrations were positively influenced by rice-duck farm soil while in the roots, this effect was recorded in only two rice varieties.”
t0“japonica rice”
Claim · model-written summary
Grain nitrogen content varied among varieties.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Material
- varietiese0
- Outcome
- Grain N contente0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain N content differed among varieties, but was not significantly influenced by soil type.”
t0“japonica rice”
Claim · model-written summary
Soil type did not significantly influence grain nitrogen.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- soil typee0
- Outcome
- Grain N contente0
- Direction
- not significantly influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain N content differed among varieties, but was not significantly influenced by soil type.”
t0“japonica rice”
The same questions in other papers
soil · nutrient: content · Oryza sativa (rice)Positive and negative results
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- positive
- positive
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See all 6 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.