Abstract
Kharif rice (Oryza sativa L.) production systems in India frequently encounter challenges, including erratic monsoon patterns, declining soil fertility and imbalanced nutrient management. This field experiment was carried out to evaluate the synergistic influence of foliar-applied seaweed-based bio-stimulant (Kappaphycus alvarezii sap) and graded nitrogen doses on the growth and productivity of kharif rice (cv. RNR-15048). The experiment was arranged in a split-plot design with three nitrogen doses (0, 60 and 120 kg ha) in main plots and four bio-stimulant doses (0, 5, 10 and 15 mL L-1) as sub-plots which were replicated thrice. The results revealed significant improvements in growth attributes at different growth stages of rice. Yield components such as panicle bearing tillers m-2, panicle length (cm), filled grains panicle-1 and 1000-grain weight (g) were also significantly influenced due to the application of bio-stimulants and varied nitrogen levels. In case of bio-stimulants, the treatment with 15 mL L-1 K. alvarezii sap produced the highest grain and stover yield (3.8 t ha-1 and 4.8 t ha-1, respectively) and with regards to nitrogen levels, application of 120 kg ha-1 of N recorded the maximum grain yield (4.1 t ha-1) and stover yield (5.1 t ha-1) of rice. The findings demonstrate that integrating bio-stimulant application at of 15 mL L-1 with an appropriate nitrogen level of 120 kg ha-1 can improve the growth and productivity of kharif rice.
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Claims 8
Claim · model-written summary
Biostimulant and nitrogen levels significantly influenced rice growth attributes.
- Taxon
- rice
Oryza sativae0 - Treatment
- bio-stimulant and nitrogen levelst0
- Outcome
- growth attributese0
- Direction
- improvementse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results revealed significant improvements in growth attributes at different growth stages of rice”
t0“bio-stimulant and nitrogen levels”
Claim · model-written summary
Biostimulant and nitrogen levels significantly influenced panicle-bearing tillers, panicle length, and filled grains per panicle.
- Treatment
- bio-stimulants and varied nitrogen levelse0
- Outcome
- panicle bearing tillers m-2, panicle length (cm), filled grains panicle-1e0
Not reportedTaxonComparatorDirection
Verbatim
e0“Yield components such as panicle bearing tillers m-2, panicle length (cm), filled grains panicle-1 and 1000-grain weight (g) were also significantly influenced due to the application of bio-stimulants and varied nitrogen levels”
Claim · model-written summary
Biostimulant and nitrogen levels significantly influenced 1000-grain weight.
Not reportedTaxonComparatorDirection
Verbatim
e0“1000-grain weight (g) were also significantly influenced due to the application of bio-stimulants and varied nitrogen levels”
Claim · model-written summary
At 15 mL L-1, K. alvarezii sap produced the highest grain yield of 3.8 t ha-1.
- Taxon
- riceOryza sativat0
- Treatment
- 15 mL L-1 K. alvarezii sape0
- Outcome
- graine0
- Direction
- higheste0
- Value
- 3.8 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15 mL L-1 K. alvarezii sap produced the highest grain and stover yield (3.8 t ha-1 and 4.8 t ha-1, respectively)”
t0“rice”
Claim · model-written summary
At 15 mL L-1, K. alvarezii sap produced the highest stover yield of 4.8 t ha-1.
- Taxon
- riceOryza sativat0
- Treatment
- 15 mL L-1 K. alvarezii sape0
- Outcome
- stover yielde0
- Direction
- higheste0
- Value
- 4.8 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15 mL L-1 K. alvarezii sap produced the highest grain and stover yield (3.8 t ha-1 and 4.8 t ha-1, respectively)”
t0“rice”
Claim · model-written summary
At 120 kg ha-1 N, rice had maximum grain yield of 4.1 t ha-1.
- Taxon
- riceOryza sativae0
- Treatment
- 120 kg ha-1 of Ne0
- Outcome
- grain yielde0
- Direction
- maximume0
- Value
- 4.1 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 120 kg ha-1 of N recorded the maximum grain yield (4.1 t ha-1) and stover yield (5.1 t ha-1) of rice”
Claim · model-written summary
At 120 kg ha-1 N, rice had stover yield of 5.1 t ha-1.
- Taxon
- riceOryza sativae0
- Treatment
- 120 kg ha-1 of Ne0
- Outcome
- stover yielde0
- Direction
- maximume0
- Value
- 5.1 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 120 kg ha-1 of N recorded the maximum grain yield (4.1 t ha-1) and stover yield (5.1 t ha-1) of rice”
Claim · model-written summary
The authors conclude that 15 mL L-1 biostimulant with 120 kg ha-1 nitrogen can improve rice growth and productivity.
Verbatim
e0“integrating bio-stimulant application at of 15 mL L-1 with an appropriate nitrogen level of 120 kg ha-1 can improve the growth and productivity of kharif rice”
The same questions in other papers
Kappaphycus alvarezii · yield · Oryza sativa (rice)Results agree
1 paper in the same direction as this paper
- positive
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
507 papers more in this group
See all 511 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.