Abstract
ABSTRACT Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions. These included the interspecific hybrids, the lowland New Rice for Africa (NERICA) genotypes developed from crossing O. sativa and O. glaberrima Fertilizer rates were 70–86N: 30–37P 2 O 5 : 30–37K 2 O kg ha −1 Fertilizer application increased average grain yield across all genotypes and experiments by 39% (154 g m −2 increase). Considerable genotypic differences existed in grain yields under both nonfertilized and fertilized conditions, and in yield response to fertilizer application. Two lowland NERICA genotypes (‘NERICA‐L‐6’ and ‘‐54’) outyielded ‘IR 72’ and ‘WITA4’ (standard checks) across nonfertilized and fertilized conditions in four experiments with favorable water availability in wet seasons (651 vs. 575 g m −2 ). The high grain yields resulted from large spikelet number m −2 and biomass accumulation. In contrast, three indica genotypes from Asia (‘B 6144F‐MR‐6‐0‐0’, ‘IR 70181‐32‐PMI‐1‐1‐5‐1’, and ‘PSBRc 80’) outperformed the checks in two experiments, one straddling wet and dry seasons and the other with no standing water during most of the usual wet rice‐growing season. These results indicate that while specific adaptations are likely to provide significant yield advantage in particular environments, interspecific breeding still offers an effective approach to improving lowland rice productivity.
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Claims 7
Claim · model-written summary
Fertilizer application increased average grain yield of rice across genotypes and experiments by 39% relative to nonfertilized conditions.
- Taxon
- rice
Oryza sativae0 - Treatment
- Fertilizer applicatione1
- Outcome
- average grain yielde1
- Direction
- increasede1
- Value
- 39%e1
- Qualifier
- 154 g m −2 increasee1
- Comparator
- nonfertilizede0
- Setting
- southern Benine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e1“Fertilizer application increased average grain yield across all genotypes and experiments by 39% (154 g m −2 increase)”
Claim · model-written summary
Rice genotypes differed considerably in grain yield under nonfertilized and fertilized conditions.
- Taxon
- riceOryza sativae0
- Outcome
- grain yieldse2
- Qualifier
- nonfertilized and fertilized conditionse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e2“Considerable genotypic differences existed in grain yields under both nonfertilized and fertilized conditions”
Claim · model-written summary
Rice genotypes differed in their yield response to fertilizer application.
- Taxon
- riceOryza sativae0
- Treatment
- fertilizer applicatione3
- Outcome
- yield response to fertilizer applicatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e3“and in yield response to fertilizer application”
Claim · model-written summary
Two lowland NERICA genotypes outyielded the standard checks in grain yield across nonfertilized and fertilized conditions in four experiments with favorable water availability in wet seasons (651 vs. 575 g m −2).
- Taxon
- riceOryza sativae0
- Material
- lowland NERICA genotypese7
- Outcome
- grain yielde1
- Direction
- outyieldede5
- Value
- 651 vs. 575 g m −2e4
- Qualifier
- favorable water availabilitye4
- Comparator
- standard checkse6
- Setting
- wet seasonse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e7“Two lowland NERICA genotypes”
e5“outyielded”
e6“(standard checks)”
e4“in four experiments with favorable water availability in wet seasons (651 vs. 575 g m −2)”
e1“Fertilizer application increased average grain yield across all genotypes and experiments by 39% (154 g m −2 increase)”
Claim · model-written summary
Three indica genotypes from Asia outperformed the checks in grain yield in two experiments, one straddling wet and dry seasons.
- Taxon
- riceOryza sativae0
- Material
- indica genotypese5
- Outcome
- grain yielde1
- Direction
- outperformede4
- Comparator
- the checkse4
- Setting
- wet and dry seasonse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e5“three indica genotypes from Asia”
e4“outperformed the checks in two experiments, one straddling wet and dry seasons”
e1“Fertilizer application increased average grain yield across all genotypes and experiments by 39% (154 g m −2 increase)”
Claim · model-written summary
Interspecific breeding is an effective approach to improving lowland rice productivity.
- Taxon
- riceOryza sativae7
- Outcome
- lowland rice productivitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“interspecific breeding still offers an effective approach to improving lowland rice productivity”
Claim · model-written summary
The high grain yields were associated with large spikelet number and biomass accumulation in rice.
- Taxon
- riceOryza sativae0
- Outcome
- high grain yieldse2
- Qualifier
- large spikelet number m −2 and biomass accumulatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six lowland experiments were conducted over three years in southern Benin to assess yield differences in 28 rice ( Oryza spp.) genotypes grown under nonfertilized and fertilized conditions”
e2“The high grain yields resulted from large spikelet number m −2 and biomass accumulation”
The same questions in other papers
fertilization · yield · Oryza sativa (rice)Positive and negative results
3,182 papers in the same direction as this paper · 207 in the opposite direction · 65 reporting no difference from an alternative
- positive
- positive
- no effect
3,451 papers more in this group
See all 3,455 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.