Abstract
Author : V. PRASADA RAO Title of thesis : Validation of Nitrogen Recommendations for Popular Rice (Oryza sativa L.) Varieties Coastal Andhra Pradesh Degree to which it is submitted : Master of Science in Agriculture Faculty : Agriculture Discipline : Agronomy Major Advisor : Dr. G. SUBBAIAH University : ACHARYA N. G. RANGA AGRICULTURAL UNIVERSITY Year of submission : 2010 A field experiment entitled “Validation of Nitrogen Recommendations for Popular Rice (Oryza sativa L.) Varieties of Coastal Andhra Pradesh” was conducted at the Agricultural College Farm, Bapatla on a sandy clay loam soil during kharif season of 2009-10. The treatments consisted combination of four varieties (BPT 5204, NLR 33892, NLR 28523 and MTU 1061) and five levels of nitrogen (120, 150, 180, 210 and 240 kg ha). The experiment was laid out in a Randomized Block Design with Factorial Concept with three replications. The findings of the experiment revealed that the growth parameters such as plant height, number of tillers m, drymatter production, chlorophyll content (SPAD reading), number of green leaves per culm, days to 50 per cent flowering and maturity measured at different intervals were significantly influenced by varieties and nitrogen levels. However, interaction between varieties and nitrogen levels was significant in respect of plant height at maturity and drymatter production at 60 and 90 DAT only. Among different varieties, the maximum height was with 90 DAT and maturity, whereas, more number of tillers were with BPT 5204 and higher drymatter with NLR 28523. The number of days to 50 per cent flowering and maturity were the maximum with NLR 28523 and minimum with BPT 5204. There was significant improvement in all the growth parameters viz., plant height, number of tillers m, drymatter production, chlorophyll content (SPAD reading), and number of green leaves per culm with increase in N level from 120 to 240 kg ha. Flowering and maturity were delayed at higher level of nitrogen. The highest number of total and filled grains panicle, grain yield, test weight, harvest index and total N uptake were recorded with NLR 28523. Whereas, the maximum productive tillers m, straw yield was with BPT 5204. The significant increase yield attributing characters, grain and straw yields, harvest index and N uptake were with increase in N levels from 120 to 240 kg ha. The benefit-cost ratio was maximum with highest level (240 kg ha) of nitrogen. From the present investigation, it can be concluded that under sandy clay loam soils of Bapatla, NLR 28523 performed better in giving the maximum yield, net returns and benefit-cost ratio. The highest yields were obtained at the highest level of nitrogen (240 kg ha). However, the optimum dose for BPT 5204 was 229 kg ha whereas, for NLR 33892, NLR 28523 and MTU 1061 yield increased linearly with increase in nitrogen.
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Claims 16
Claim · model-written summary
Variety and nitrogen level significantly influenced growth parameters.
- Taxon
- RICE (Oryza sativa L.)
Oryza sativat0 - Treatment
- nitrogen levelse0
- Outcome
- growth parameterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth parameters such as plant height, number of tillers m, drymatter production, chlorophyll content (SPAD reading), number of green leaves per culm, days to 50 per cent flowering and maturity measured at different intervals were significantly influenced by varieties and nitrogen levels”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Variety by nitrogen interaction was significant for plant height at maturity and drymatter at 60 and 90 DAT only.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Outcome
- plant height at maturity and drymatter productione0
- Qualifier
- 60 and 90 DAT onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction between varieties and nitrogen levels was significant in respect of plant height at maturity and drymatter production at 60 and 90 DAT only”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
BPT 5204 had more tillers.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- BPT 5204e0
- Outcome
- number of tillerse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more number of tillers were with BPT 5204”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
NLR 28523 had higher dry matter.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- NLR 28523e0
- Outcome
- drymattere0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher drymatter with NLR 28523”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
NLR 28523 had maximum days to flowering and maturity.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- NLR 28523e0
- Outcome
- number of days to 50 per cent flowering and maturitye0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of days to 50 per cent flowering and maturity were the maximum with NLR 28523”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
BPT 5204 had minimum days to flowering and maturity.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- BPT 5204e0
- Outcome
- number of days to 50 per cent flowering and maturitye0
- Direction
- minimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“number of days to 50 per cent flowering and maturity were the maximum with NLR 28523 and minimum with BPT 5204”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Increasing N from 120 to 240 kg ha significantly improved growth parameters.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Treatment
- N level from 120 to 240 kg hae0
- Outcome
- growth parameterse0
- Direction
- improvemente0
- Comparator
- 120e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant improvement in all the growth parameters viz., plant height, number of tillers m, drymatter production, chlorophyll content (SPAD reading), and number of green leaves per culm with increase in N level from 120 to 240 kg ha”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Higher nitrogen delayed flowering and maturity.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Treatment
- higher level of nitrogene0
- Outcome
- Flowering and maturitye0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flowering and maturity were delayed at higher level of nitrogen”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
NLR 28523 had highest grain components, grain yield, test weight, harvest index and N uptake.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- NLR 28523e0
- Outcome
- grain yield, test weight, harvest index and total N uptakee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest number of total and filled grains panicle, grain yield, test weight, harvest index and total N uptake were recorded with NLR 28523”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
BPT 5204 had maximum productive tillers and straw yield.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- BPT 5204e0
- Outcome
- productive tillers m, straw yielde0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum productive tillers m, straw yield was with BPT 5204”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Increasing N significantly increased yield attributes, grain and straw yields, harvest index and N uptake.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Treatment
- N levels from 120 to 240 kg hae0
- Outcome
- grain and straw yields, harvest index and N uptakee0
- Direction
- increasee0
- Comparator
- 120e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant increase yield attributing characters, grain and straw yields, harvest index and N uptake were with increase in N levels from 120 to 240 kg ha”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
The benefit-cost ratio was maximum at 240 kg ha nitrogen.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Treatment
- 240 kg hae0
- Outcome
- benefit-cost ratioe0
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“benefit-cost ratio was maximum with highest level (240 kg ha) of nitrogen”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
NLR 28523 gave maximum yield, net returns and benefit-cost ratio at Bapatla.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- NLR 28523e0
- Outcome
- yield, net returns and benefit-cost ratioe0
- Direction
- maximume0
- Setting
- Bapatlae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under sandy clay loam soils of Bapatla, NLR 28523 performed better in giving the maximum yield, net returns and benefit-cost ratio”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Highest yields occurred at 240 kg ha nitrogen.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Treatment
- 240 kg hae0
- Outcome
- yieldse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest yields were obtained at the highest level of nitrogen (240 kg ha)”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
The optimum N dose for BPT 5204 was 229 kg ha.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- BPT 5204e0
- Outcome
- optimum dosee0
- Value
- 229 kg hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimum dose for BPT 5204 was 229 kg ha”
t0“RICE (Oryza sativa L.)”
Claim · model-written summary
Yield rose linearly with N for NLR 33892, NLR 28523 and MTU 1061.
- Taxon
- RICE (Oryza sativa L.)Oryza sativat0
- Material
- NLR 33892, NLR 28523 and MTU 1061e0
- Outcome
- yielde0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for NLR 33892, NLR 28523 and MTU 1061 yield increased linearly with increase in nitrogen”
t0“RICE (Oryza sativa L.)”
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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.