Abstract
Four upland rice varieties namely Norin 26 (Japonica type), Yar 2 (Indica type) and NERICA 1 and NERICA 4 were grown in nutrient solutions separately deficient of one of the following elements: N, P, K, Ca and Mg, to examine deficiency symptoms as well as the effects on growth and grain yield. All varieties showed similar response to any of the deficient nutrient element at different levels. P and N deficiencies were the most growth limiting factors at the early growth period of all varieties. NERICA 1 and NERICA 4 varieties recorded the lowest yield reduction due to nutrient deficiencies. The results indicate that NERICA varieties which are interspecific hybrids of Oryza sativa L. and Oryza glaberrima Steud. have relative advantage over their cultivated rice parent O. sativa L., which was represented by Norin 26 and Yar 2, for cultivation under nutrient deficient low fertile soil of the upland ecosystems.
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Claims 6
Claim · model-written summary
All upland rice varieties responded similarly to each deficient nutrient at different levels.
- Taxon
- upland rice
Oryza sativat0 - Outcome
- similar response to any of the deficient nutrient elemente0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All varieties showed similar response to any of the deficient nutrient element at different levels.”
t0“upland rice”
Claim · model-written summary
Phosphorus deficiency was among the most limiting factors for early growth in all rice varieties.
- Taxon
- upland riceOryza sativat0
- Organ / stage
- early growth periode0
- Treatment
- Pe0
- Outcome
- growthe0
- Direction
- limitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P and N deficiencies were the most growth limiting factors at the early growth period of all varieties.”
t0“upland rice”
Claim · model-written summary
Nitrogen deficiency was among the most limiting factors for early growth in all rice varieties.
- Taxon
- upland riceOryza sativat0
- Organ / stage
- early growth periode0
- Treatment
- Ne0
- Outcome
- growthe0
- Direction
- limitinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P and N deficiencies were the most growth limiting factors at the early growth period of all varieties.”
t0“upland rice”
Claim · model-written summary
NERICA 1 had among the smallest yield reductions from nutrient deficiencies.
- Taxon
- upland riceOryza sativat0
- Material
- NERICA 1e0
- Treatment
- nutrient deficienciese0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NERICA 1 and NERICA 4 varieties recorded the lowest yield reduction due to nutrient deficiencies.”
t0“upland rice”
Claim · model-written summary
NERICA 4 had among the smallest yield reductions from nutrient deficiencies.
- Taxon
- upland riceOryza sativat0
- Material
- NERICA 4e0
- Treatment
- nutrient deficienciese0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NERICA 1 and NERICA 4 varieties recorded the lowest yield reduction due to nutrient deficiencies.”
t0“upland rice”
Claim · model-written summary
NERICA varieties were judged advantageous over their cultivated rice parent for nutrient-deficient upland soils.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- NERICA varietiese0
- Outcome
- relative advantagee0
- Comparator
- O. sativa L.e0
- Setting
- upland ecosystemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NERICA varieties which are interspecific hybrids of Oryza sativa L. and Oryza glaberrima Steud. have relative advantage over their cultivated rice parent O. sativa L., which was represented by Norin 26 and Yar 2, for cultivation under nutrient deficient low fertile soil of the upland ecosystems.”
The same questions in other papers
phosphorus · growth · Oryza sativa (rice)Positive and negative results
132 papers in the same direction as this paper · 32 in the opposite direction · 1 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- negative
- negative
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See all 166 papers →nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- negative
- negative
507 papers more in this group
See all 511 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.