Abstract
Nitrogen (N) plays a crucial role in metabolic and physiological processes of rice. As a result, N causes variation in status of growth parameters, yield attributers as well as grain and straw yield of rice. Data base on various growth parameters recorded in different time and that of yield attributers can be used to work out the individual relationship of each parameter with grain or straw yield. Such statistical analysis may not yield a concrete result. However, principal component analysis (PCA) helps in identifying the principal components among the observed parameters and their relative influence on grain or straw yield. With such background a field study was carried out in southern Odisha, India; to assess the performance of different crop parameters and yield of kharif rice under seven nitrogen levels. Crop was exposed to: 0, 20, 40, 60, 80, 100 and 120 kg N ha-1. Increase in N level increases the magnitude of: plant height, total tiller number per m2, leaf area index (LAI), number of panicles bearing tiller per m2, number of spikelets per panicle, panicle length, per cent filled grains, grain and straw yield. Status of all variables increased with an increase in N level. The increment was significantly differed among the treatments, when the N level difference was 40 kg N ha-1. Principal component analysis (PCA biplot) established that, a strong performance of rice under N80 (which is the recommended dose of rice in this region) followed by N60, N100, N40, N120 and so on. The parameter, ‘panicle bearing tiller 90’ is the well representative parameter in the PCA space followed by percent filled grain and plant height.
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Claims 6
Claim · model-written summary
Increasing nitrogen increased plant height, tiller number and leaf area index.
- Taxon
- rice
Oryza sativat0 - Treatment
- N levele0
- Outcome
- plant height, total tiller number per m2, leaf area index (LAI)e0
- Direction
- increasese0
Not reportedComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in N level increases the magnitude of: plant height, total tiller number per m2, leaf area index (LAI), number of panicles bearing tiller per m2, number of spikelets per panicle, panicle length, per cent filled grains, grain and straw yield”
t0“yield of rice”
Claim · model-written summary
Increasing nitrogen increased panicle bearing tillers, spikelets and panicle length.
- Taxon
- riceOryza sativat0
- Treatment
- N levele0
- Outcome
- number of panicles bearing tiller per m2, number of spikelets per panicle, panicle lengthe0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in N level increases the magnitude of: plant height, total tiller number per m2, leaf area index (LAI), number of panicles bearing tiller per m2, number of spikelets per panicle, panicle length, per cent filled grains, grain and straw yield”
t0“yield of rice”
Claim · model-written summary
Increasing nitrogen increased filled grain percentage, grain yield and straw yield.
- Taxon
- riceOryza sativat0
- Treatment
- N levele0
- Outcome
- per cent filled grains, grain and straw yielde0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in N level increases the magnitude of: plant height, total tiller number per m2, leaf area index (LAI), number of panicles bearing tiller per m2, number of spikelets per panicle, panicle length, per cent filled grains, grain and straw yield”
t0“yield of rice”
Claim · model-written summary
Treatment increments differed significantly when nitrogen levels differed by 40 kg N ha-1.
- Taxon
- riceOryza sativat0
- Treatment
- N level differencee0
- Outcome
- incremente0
- Value
- 40 kg N ha-1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increment was significantly differed among the treatments, when the N level difference was 40 kg N ha-1”
t0“yield of rice”
Claim · model-written summary
PCA ranked N80 as strongest, followed by N60, N100, N40 and N120.
- Taxon
- riceOryza sativat0
- Outcome
- strong performance of ricee0
- Value
- N80e0
- Comparator
- N60, N100, N40, N120e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Principal component analysis (PCA biplot) established that, a strong performance of rice under N80 (which is the recommended dose of rice in this region) followed by N60, N100, N40, N120 and so on”
t0“yield of rice”
Claim · model-written summary
Panicle bearing tiller 90 was the most representative PCA parameter, followed by percent filled grain and plant height.
- Taxon
- riceOryza sativat0
- Outcome
- well representative parameter in the PCA spacee0
- Comparator
- percent filled grain and plant heighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The parameter, ‘panicle bearing tiller 90’ is the well representative parameter in the PCA space followed by percent filled grain and plant height”
t0“yield of rice”
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See all 2,045 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.