Abstract
ABSTRACT The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado, a region with adverse weather conditions. The use of silicon in its cultivation becomes important, since this nutrient provides higher rigidity, lower transpiration and higher resistance to dry spells in rice plants. The objective of the present study was to evaluate the effect of silicon fertilization and soil water tensions on upland rice development and yield in a Cerrado Oxisol. A 5 x 5 fractionated factorial with five soil water tensions (0, 15, 30, 45 and 60 kPa) and five silicon doses (0, 120, 240, 480 and 960 mg dm-3) was used, which were distributed in a randomized block design, with four replicates. Plant height, number of tillers, number of panicles, number of grains per panicle, numbers of full and empty grains and percentage of empty grains were evaluated. Silicon fertilization promotes increased tillering in rice plants at the dose of 960 mg dm-3. The numbers of tillers and panicles decreased with the application of silicon up to the doses of 460 and 490 mg dm-3, respectively. The increase in soil water tensions reduced plant height and the number of full grains, and increased the percentage of empty grains of upland rice.
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Claims 6
Claim · model-written summary
Silicon fertilization at 960 mg dm-3 promoted increased tillering in upland rice.
- Taxon
- upland rice
Oryza sativae0 - Treatment
- Silicon fertilizatione2
- Outcome
- tilleringe2
- Direction
- increasede2
- Qualifier
- at the dose of 960 mg dm-3e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e2“Silicon fertilization promotes increased tillering in rice plants at the dose of 960 mg dm-3”
Claim · model-written summary
Silicon application decreased the number of tillers in upland rice up to 460 mg dm-3.
- Taxon
- upland riceOryza sativae0
- Treatment
- application of silicone3
- Outcome
- numbers of tillerse3
- Direction
- decreasede3
- Qualifier
- up to the doses of 460e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e3“The numbers of tillers and panicles decreased with the application of silicon up to the doses of 460 and 490 mg dm-3, respectively”
Claim · model-written summary
Silicon application decreased the number of panicles in upland rice up to 490 mg dm-3.
- Taxon
- upland riceOryza sativae0
- Treatment
- application of silicone3
- Outcome
- paniclese3
- Direction
- decreasede3
- Qualifier
- 490 mg dm-3, respectivelye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e3“The numbers of tillers and panicles decreased with the application of silicon up to the doses of 460 and 490 mg dm-3, respectively”
Claim · model-written summary
Increasing soil water tension reduced plant height of upland rice.
- Taxon
- upland riceOryza sativae0
- Treatment
- increase in soil water tensionse4
- Outcome
- plant heighte4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e4“The increase in soil water tensions reduced plant height and the number of full grains, and increased the percentage of empty grains of upland rice”
Claim · model-written summary
Increasing soil water tension reduced the number of full grains of upland rice.
- Taxon
- upland riceOryza sativae0
- Treatment
- increase in soil water tensionse4
- Outcome
- number of full grainse4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e4“The increase in soil water tensions reduced plant height and the number of full grains, and increased the percentage of empty grains of upland rice”
Claim · model-written summary
Increasing soil water tension increased the percentage of empty grains of upland rice.
- Taxon
- upland riceOryza sativae0
- Treatment
- increase in soil water tensionse4
- Outcome
- percentage of empty grainse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultivation of upland rice (Oryza sativa) in Brazil occurs mainly in the Cerrado”
e4“The increase in soil water tensions reduced plant height and the number of full grains, and increased the percentage of empty grains of upland rice”
The same questions in other papers
soil water · growth · Oryza sativa (rice)Positive and negative results
18 papers in the same direction as this paper · 21 in the opposite direction
- negative
- positive
- positive
36 papers more in this group
See all 40 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.