Abstract
Hydroponical experiments with different ratios of NH + 4?N/NO - 3?N were conducted to study the biological response to different N forms.The results showed that root fresh weight,root growth rate,root water contents and total N and total P in rice increased with the decreasing ratio of NH + 4?N/NO - 3?N.However,all these indexes decreased on the condition of sole nitrate nutrition.Water use efficiency by rice crop was highest in the ratio of NH + 4?N/NO - 3?N at 50/50.The rice leaves and photosynthesis responded to different ratios of NH + 4?N /NO - 3?N dramatically,highest photosynthesis being obtained at the NH + 4?N/NO - 3?N ratio of 25/75.These indicated that the both high NH + 4?N and high NO - 3?N percentage would decrease the synthesis of organic material and accumulation of rice biomass in which the effects of high percentage of NH + 4?N were more serious than NO - 3?N.Rice crop could grow best when the ratio of NH + 4?N/NO - 3?N was 50/50?25/75.
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Claims 7
Claim · model-written summary
Root fresh weight, root growth rate and root water content increased as the ammonium/nitrate ratio decreased.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- roote0
- Treatment
- decreasing ratio of NH + 4?N/NO - 3?Ne0
- Outcome
- root fresh weight,root growth rate,root water contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root fresh weight,root growth rate,root water contents and total N and total P in rice increased with the decreasing ratio of NH + 4?N/NO - 3?N”
Claim · model-written summary
Total N and total P in rice increased as the ammonium/nitrate ratio decreased.
- Taxon
- riceOryza sativae0
- Treatment
- decreasing ratio of NH + 4?N/NO - 3?Ne0
- Outcome
- total N and total Pe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total N and total P in rice increased with the decreasing ratio of NH + 4?N/NO - 3?N”
Claim · model-written summary
These growth and nutrient indices decreased under sole nitrate nutrition.
- Taxon
- riceOryza sativat0
- Treatment
- sole nitrate nutritione0
- Outcome
- all these indexese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all these indexes decreased on the condition of sole nitrate nutrition”
t0“rice”
Claim · model-written summary
Rice water use efficiency was highest at an ammonium/nitrate ratio of 50/50.
- Taxon
- riceOryza sativae0
- Treatment
- ratio of NH + 4?N/NO - 3?N at 50/50e0
- Outcome
- Water use efficiencye0
- Direction
- higheste0
- Value
- 50/50e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water use efficiency by rice crop was highest in the ratio of NH + 4?N/NO - 3?N at 50/50”
Claim · model-written summary
Rice photosynthesis was highest at an ammonium/nitrate ratio of 25/75.
- Taxon
- riceOryza sativat0
- Treatment
- NH + 4?N/NO - 3?N ratio of 25/75e0
- Outcome
- photosynthesise0
- Direction
- higheste0
- Value
- 25/75e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest photosynthesis being obtained at the NH + 4?N/NO - 3?N ratio of 25/75”
t0“rice”
Claim · model-written summary
High ammonium percentage decreased organic material synthesis and rice biomass accumulation more seriously than high nitrate percentage.
- Taxon
- riceOryza sativae0
- Treatment
- high NH + 4?Ne0
- Outcome
- synthesis of organic material and accumulation of rice biomasse0
- Direction
- decreasee0
- Comparator
- NO - 3?Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both high NH + 4?N and high NO - 3?N percentage would decrease the synthesis of organic material and accumulation of rice biomass in which the effects of high percentage of NH + 4?N were more serious than NO - 3?N”
Claim · model-written summary
Rice growth was best at ammonium/nitrate ratios of 50/50 to 25/75.
- Taxon
- RiceOryza sativae0
- Outcome
- grow beste0
- Direction
- beste0
- Value
- 50/50?25/75e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice crop could grow best when the ratio of NH + 4?N/NO - 3?N was 50/50?25/75”
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