Abstract
This study was conducted to determine the effects of drought stress, planting density and geometry on rice, in form of randomized complete block design an as a split-split plots experiment with 4 replications (2010 and 2011). Factors were drought stress, as main factor with 3 levels (normal irrigation and retain the height of 20-30 cm for water, and 2 levels of water stress with 7 days interval between two successive irrigation in vegetative and reproductive stages), planting geometry as sub factor with 2 levels (square and rectangular planting), and planting density as sub-sub factor with 3 levels (160000,250000 and 444000 pl/ha). Results showed that by drought stress, characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the number of grains per head, the thousand grains weight, the yield of each hill and grain yield were significantly decreased. With change square planting to non-square, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the yield of each hill and grain yield were significantly increased. Results showed that by increasing the planting density, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of grains per head and yield of each hill were significantly decreased, while some characteristics such as; the number of fertile heads per square meter and grain yield were significantly increased.
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Claims 8
Claim · model-written summary
Drought stress significantly decreased fertile tillers, heads per hill, and fertile heads per square meter.
- Taxon
- Rice
Oryza sativat0 - Treatment
- drought stresse0
- Outcome
- the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square metere0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by drought stress, characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the number of grains per head, the thousand grains weight, the yield of each hill and grain yield were significantly decreased.”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Drought stress significantly decreased grains per head and thousand grain weight.
- Taxon
- RiceOryza sativat0
- Treatment
- drought stresse0
- Outcome
- the number of grains per head, the thousand grains weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by drought stress, characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the number of grains per head, the thousand grains weight, the yield of each hill and grain yield were significantly decreased.”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Drought stress significantly decreased yield per hill and grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- drought stresse0
- Outcome
- the yield of each hill and grain yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by drought stress, characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the number of grains per head, the thousand grains weight, the yield of each hill and grain yield were significantly decreased.”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Changing square to non-square planting significantly increased fertile tillers, heads per hill, and fertile heads per square meter.
- Taxon
- RiceOryza sativat0
- Treatment
- non-squaree0
- Outcome
- the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square metere0
- Direction
- increasede0
- Comparator
- square plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With change square planting to non-square, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the yield of each hill and grain yield were significantly increased.”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Changing square to non-square planting significantly increased yield per hill and grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- non-squaree0
- Outcome
- the yield of each hill and grain yielde0
- Direction
- increasede0
- Comparator
- square plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With change square planting to non-square, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of fertile heads per square meter, the yield of each hill and grain yield were significantly increased.”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Increasing density significantly decreased fertile tillers, heads per hill, and grains per head.
- Taxon
- RiceOryza sativat0
- Treatment
- increasing the planting densitye0
- Outcome
- the number of fertile tillers per hill, the number of head per hill, the number of grains per heade0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing the planting density, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of grains per head and yield of each hill were significantly decreased”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Increasing density significantly decreased yield per hill.
- Taxon
- RiceOryza sativat0
- Treatment
- increasing the planting densitye0
- Outcome
- yield of each hille0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing the planting density, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of grains per head and yield of each hill were significantly decreased”
t0“Rice in Khoramabad Region”
Claim · model-written summary
Increasing density significantly increased fertile heads per square meter and grain yield.
- Taxon
- RiceOryza sativat0
- Treatment
- increasing the planting densitye0
- Outcome
- the number of fertile heads per square meter and grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by increasing the planting density, some characteristics such as; the number of fertile tillers per hill, the number of head per hill, the number of grains per head and yield of each hill were significantly decreased, while some characteristics such as; the number of fertile heads per square meter and grain yield were significantly increased.”
t0“Rice in Khoramabad Region”
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drought · yield · Oryza sativa (rice)Positive and negative results
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329 papers in the same direction as this paper · 58 in the opposite direction · 7 reporting no difference from an alternative
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See all 395 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.