Abstract
Nitrogen and potassium are the yield-limiting nutrients in rice production regions of Iran. Use of N and K efficient cultivars is an important complementary strategy in improving rice yield, increasing the quality properties of rice grains and reducing cost of production. In order to consider the effects of different amounts of N and K application on rice (Oryza sativa L.) yield and yield components in pot and field conditions these experiments were undertaken in 2004 at Sari Agricultural Station, Iran. Four levels of N (0, 50, 100 and 150 Kg N ha(-1) in field and 0, 0.6, 1.2 and 1.8 g N pot(-1) in pot) corresponding with four levels of K (0, 75, 150 and 225 kg K2O ha(-1) in field and 0, 0.5, 1 and 1.5 g K2O pot(-1) in pot) were applied in a split-factorial plot design with three replications in both pot and field experiments, variously. Grain yield, number of grain per panicle, number of tiller, plant height, length of flag leaf, total and shoot dry matter, 1000 grain weight and harvest index have been increased by N application in field conditions. However, in pot conditions grain yield, number of grain per panicle, number of tiller, plant height, width of flag leaf, total and shoot dry matter, leaf nitrogen contents and harvest index have significantly been increased (p < or = 0.05). Potassium application in field conditions has significantly affected on all characteristics but 1000 grain weight and leaf N and K contents. Simultaneous application of N and K have increasingly affected on grain yield, plant height, shoot dry matter and harvest index in field conditions and on plant height, length of flag leaf and shoot dry matter in pot conditions (p < or = 0.05).
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Claims 10
Claim · model-written summary
N application increased grain yield, number of grains per panicle and number of tillers of rice in field conditions.
- Taxon
- Rice
Oryza sativat0 - Treatment
- N applicatione0
- Outcome
- Grain yield, number of grain per panicle, number of tillere0
- Direction
- increasede0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield, number of grain per panicle, number of tiller, plant height, length of flag leaf, total and shoot dry matter, 1000 grain weight and harvest index have been increased by N application in field conditions”
t0“Rice”
Claim · model-written summary
N application increased plant height, flag leaf length and total and shoot dry matter of rice in field conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- N applicatione0
- Outcome
- plant height, length of flag leaf, total and shoot dry mattere0
- Direction
- increasede0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield, number of grain per panicle, number of tiller, plant height, length of flag leaf, total and shoot dry matter, 1000 grain weight and harvest index have been increased by N application in field conditions”
t0“Rice”
Claim · model-written summary
N application increased 1000 grain weight and harvest index of rice in field conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- N applicatione0
- Outcome
- 1000 grain weight and harvest indexe0
- Direction
- increasede0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield, number of grain per panicle, number of tiller, plant height, length of flag leaf, total and shoot dry matter, 1000 grain weight and harvest index have been increased by N application in field conditions”
t0“Rice”
Claim · model-written summary
N application significantly increased grain yield, number of grains per panicle and number of tillers of rice in pot conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- N applicatione2
- Outcome
- grain yield, number of grain per panicle, number of tillere0
- Direction
- increasede0
- Setting
- pot conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in pot conditions grain yield, number of grain per panicle, number of tiller, plant height, width of flag leaf, total and shoot dry matter, leaf nitrogen contents and harvest index have significantly been increased (p < or = 0.05)”
e2“increased by N application”
t0“Rice”
Claim · model-written summary
N application significantly increased plant height, flag leaf width and total and shoot dry matter of rice in pot conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- N applicatione2
- Outcome
- plant height, width of flag leaf, total and shoot dry mattere0
- Direction
- increasede0
- Setting
- pot conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in pot conditions grain yield, number of grain per panicle, number of tiller, plant height, width of flag leaf, total and shoot dry matter, leaf nitrogen contents and harvest index have significantly been increased (p < or = 0.05)”
e2“increased by N application”
t0“Rice”
Claim · model-written summary
N application significantly increased leaf nitrogen contents and harvest index of rice in pot conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- N applicatione2
- Outcome
- leaf nitrogen contents and harvest indexe0
- Direction
- increasede0
- Setting
- pot conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in pot conditions grain yield, number of grain per panicle, number of tiller, plant height, width of flag leaf, total and shoot dry matter, leaf nitrogen contents and harvest index have significantly been increased (p < or = 0.05)”
e2“increased by N application”
t0“Rice”
Claim · model-written summary
Potassium application significantly affected all measured characteristics of rice in field conditions except 1000 grain weight and leaf N and K contents.
- Taxon
- RiceOryza sativat0
- Treatment
- Potassium applicatione0
- Outcome
- all characteristicse0
- Qualifier
- but 1000 grain weight and leaf N and K contentse0
- Setting
- field conditionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium application in field conditions has significantly affected on all characteristics but 1000 grain weight and leaf N and K contents”
t0“Rice”
Claim · model-written summary
Simultaneous N and K application increased grain yield and plant height of rice in field conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- Simultaneous application of N and Ke0
- Outcome
- grain yield, plant heighte0
- Direction
- increasinglye0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneous application of N and K have increasingly affected on grain yield, plant height, shoot dry matter and harvest index in field conditions and on plant height, length of flag leaf and shoot dry matter in pot conditions (p < or = 0.05)”
t0“Rice”
Claim · model-written summary
Simultaneous N and K application increased shoot dry matter and harvest index of rice in field conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- Simultaneous application of N and Ke0
- Outcome
- shoot dry matter and harvest indexe0
- Direction
- increasinglye0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneous application of N and K have increasingly affected on grain yield, plant height, shoot dry matter and harvest index in field conditions and on plant height, length of flag leaf and shoot dry matter in pot conditions (p < or = 0.05)”
t0“Rice”
Claim · model-written summary
Simultaneous N and K application increased plant height, flag leaf length and shoot dry matter of rice in pot conditions.
- Taxon
- RiceOryza sativat0
- Treatment
- Simultaneous application of N and Ke0
- Outcome
- plant height, length of flag leaf and shoot dry mattere0
- Direction
- increasinglye0
- Setting
- pot conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simultaneous application of N and K have increasingly affected on grain yield, plant height, shoot dry matter and harvest index in field conditions and on plant height, length of flag leaf and shoot dry matter in pot conditions (p < or = 0.05)”
t0“Rice”
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