Abstract
In upland rice, the reduced grain yield that originates from the moisture stress period is related to the plant’s tolerance of water deficiency and may vary between cultivars. The purpose of the work presented here was to evaluate the performance of upland rice cultivars in both rainfed and sprinkler-irrigated systems. A split-plot scheme with 8 replicates in a randomised block design was used. The plots were composed of 2 cropping systems (rainfed and sprinkler-irrigated) and the split-plot consisted of 2 cultivars (IAC 201 and Carajás) which are suggested for cultivation in upland ecosystems. Carajás had a greater number of panicles per square metre, higher spikelet fertility and grain mass, and, consequently, a higher grain yield than IAC 201 regardless of cropping system. IAC 201 was more sensitive to water deficiency than Carajás. Sprinkler irrigation improved spikelet fertility, grain mass and upland rice grain yield. Even when cultivars with a higher tolerance of water deficiency are used, a sprinkler-irrigated system may be a viable method to increase upland rice yield throughout most of the Brazilian Cerrado.
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Claims 6
Claim · model-written summary
Carajás had a greater number of panicles per square metre than IAC 201 regardless of cropping system.
- Taxon
- upland rice
Oryza sativat0 - Material
- Carajáse1
- Outcome
- number of panicles per square metree1
- Direction
- greatere1
- Comparator
- IAC 201e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“Carajás had a greater number of panicles per square metre, higher spikelet fertility and grain mass, and, consequently, a higher grain yield than IAC 201 regardless of cropping system”
Claim · model-written summary
Carajás had higher spikelet fertility and grain mass than IAC 201 regardless of cropping system.
- Taxon
- upland riceOryza sativat0
- Material
- Carajáse1
- Outcome
- spikelet fertility and grain masse1
- Direction
- highere1
- Comparator
- IAC 201e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“Carajás had a greater number of panicles per square metre, higher spikelet fertility and grain mass, and, consequently, a higher grain yield than IAC 201 regardless of cropping system”
Claim · model-written summary
Carajás had a higher grain yield than IAC 201 regardless of cropping system.
- Taxon
- upland riceOryza sativat0
- Material
- Carajáse1
- Outcome
- grain yielde1
- Direction
- highere1
- Comparator
- IAC 201e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“Carajás had a greater number of panicles per square metre, higher spikelet fertility and grain mass, and, consequently, a higher grain yield than IAC 201 regardless of cropping system”
Claim · model-written summary
IAC 201 was more sensitive to water deficiency than Carajás.
- Taxon
- upland riceOryza sativat0
- Material
- IAC 201e1
- Outcome
- sensitive to water deficiencye1
- Direction
- more sensitivee1
- Comparator
- Carajáse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“IAC 201 was more sensitive to water deficiency than Carajás”
Claim · model-written summary
Sprinkler irrigation improved spikelet fertility, grain mass and grain yield of upland rice compared with rainfed cultivation.
- Taxon
- upland riceOryza sativat0
- Treatment
- Sprinkler irrigatione1
- Outcome
- spikelet fertility, grain mass and upland rice grain yielde1
- Direction
- improvede1
- Comparator
- rainfede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“Sprinkler irrigation improved spikelet fertility, grain mass and upland rice grain yield”
e2“2 cropping systems (rainfed and sprinkler-irrigated)”
Claim · model-written summary
A sprinkler-irrigated system may be a viable method to increase upland rice yield throughout most of the Brazilian Cerrado, even with water-deficiency-tolerant cultivars.
- Taxon
- upland riceOryza sativat0
- Treatment
- sprinkler-irrigated systeme1
- Outcome
- increase upland rice yielde1
- Setting
- Brazilian Cerradoe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“upland rice”
e1“a sprinkler-irrigated system may be a viable method to increase upland rice yield throughout most of the Brazilian Cerrado”
The same questions in other papers
irrigation · yield · Oryza sativa (rice)Positive and negative results
905 papers in the same direction as this paper · 201 in the opposite direction · 64 reporting no difference from an alternative
- negative
- negative
- negative
1,167 papers more in this group
See all 1,171 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.