Abstract
Inconsistent results were obtained on the yield of rice genotypes established along the soil toposequence thus the need to validate these under controlled environment with rice genotypes. This investigation hypothesised there could be variation in the growth and yield of rice genotypes in different soil types under soil water deficit. A pot experiment was established in an open screen house, Ibadan. The treatment consisted of rice varieties (IR 64, IR 77298-14-1-2-B-10, NERICA 4 and WAB 56-104), soil ecologies [hydromorphic (H), lowland (L) and upland soils (U)] and soil moisture regime (Control and water deficit stress), in completely randomised design replicated three times. Growth in rice genotypes were significantly higher under optimum water supply than under water deficit. Conversely, rice genotypes under water deficit flowered later and had significantly higher spikelet sterility than under optimum water supply. Number of tillers plant-1 was in the order H > L > U. However, 1000 grain mass was in the order U > H > L. IR 64 had the highest grain yield. Similar pattern was observed on the shoot biomass, number of tillers and number of panicles. In different soil ecologies under water deficit, IR 64 and IR 77298-14-1-2-B-10 had significantly the highest number of panicles plant-1. These evidences suggested that high number of tillers observed in hydromorphic soil is associated with the duration of vegetative growth. Isohydric behaviour was not maintained by rice genotypes used as reflected in the variation in number of panicles under water deficit in the soil types.
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Claims 11
Claim · model-written summary
Rice growth was significantly higher with optimum water supply than with water deficit.
- Taxon
- rice
Oryza sativae0 - Treatment
- optimum water supplye0
- Outcome
- Growthe0
- Direction
- highere0
- Comparator
- water deficite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth in rice genotypes were significantly higher under optimum water supply than under water deficit.”
Claim · model-written summary
Water deficit delayed flowering in rice genotypes relative to optimum water supply.
- Taxon
- riceOryza sativae0
- Treatment
- water deficite0
- Outcome
- flowerede0
- Direction
- latere0
- Comparator
- optimum water supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice genotypes under water deficit flowered later and had significantly higher spikelet sterility than under optimum water supply.”
Claim · model-written summary
Water deficit significantly increased spikelet sterility relative to optimum water supply.
- Taxon
- riceOryza sativae0
- Treatment
- water deficite0
- Outcome
- spikelet sterilitye0
- Direction
- highere0
- Comparator
- optimum water supplye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice genotypes under water deficit flowered later and had significantly higher spikelet sterility than under optimum water supply.”
Claim · model-written summary
Rice tiller number ranked hydromorphic above lowland above upland soil.
- Taxon
- RiceOryza sativat0
- Outcome
- Number of tillers plant-1e0
- Direction
- H > L > Ue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of tillers plant-1 was in the order H > L > U.”
t0“Rice Genotypes”
Claim · model-written summary
Rice 1000 grain mass ranked upland above hydromorphic above lowland soil.
- Taxon
- RiceOryza sativat0
- Outcome
- 1000 grain masse0
- Direction
- U > H > Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1000 grain mass was in the order U > H > L.”
t0“Rice Genotypes”
Claim · model-written summary
IR 64 had the highest grain yield.
- Taxon
- RiceOryza sativat0
- Material
- IR 64e0
- Outcome
- grain yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IR 64 had the highest grain yield.”
t0“Rice Genotypes”
Claim · model-written summary
IR 64 also had the highest shoot biomass, tiller number and panicle number.
- Taxon
- RiceOryza sativat0
- Material
- IR 64e0
- Outcome
- shoot biomass, number of tillers and number of paniclese0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IR 64 had the highest grain yield. Similar pattern was observed on the shoot biomass, number of tillers and number of panicles.”
t0“Rice Genotypes”
Claim · model-written summary
Under water deficit across soils, IR 64 had significantly among the highest panicle numbers per plant.
- Taxon
- RiceOryza sativat0
- Material
- IR 64e0
- Treatment
- water deficite0
- Outcome
- number of panicles plant-1e0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In different soil ecologies under water deficit, IR 64 and IR 77298-14-1-2-B-10 had significantly the highest number of panicles plant-1.”
t0“Rice Genotypes”
Claim · model-written summary
Under water deficit across soils, IR 77298-14-1-2-B-10 had significantly among the highest panicle numbers per plant.
- Taxon
- RiceOryza sativat0
- Material
- IR 77298-14-1-2-B-10e0
- Treatment
- water deficite0
- Outcome
- number of panicles plant-1e0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In different soil ecologies under water deficit, IR 64 and IR 77298-14-1-2-B-10 had significantly the highest number of panicles plant-1.”
t0“Rice Genotypes”
Claim · model-written summary
The authors associated high tiller number in hydromorphic soil with vegetative growth duration.
- Taxon
- RiceOryza sativat0
- Outcome
- high number of tillerse0
- Direction
- highe0
- Qualifier
- duration of vegetative growthe0
- Setting
- hydromorphic soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high number of tillers observed in hydromorphic soil is associated with the duration of vegetative growth.”
t0“Rice Genotypes”
Claim · model-written summary
Rice genotypes did not maintain isohydric behaviour, as indicated by variation in panicle number under water deficit among soils.
- Taxon
- riceOryza sativae0
- Outcome
- Isohydric behavioure0
- Direction
- not maintainede0
- Qualifier
- variation in number of panicles under water deficit in the soil typese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isohydric behaviour was not maintained by rice genotypes used as reflected in the variation in number of panicles under water deficit in the soil types.”
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See all 325 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.