Abstract
Under conditions of limited water supply, intermittent irrigation instead of continuous flooding is necessitated in rice cultivation. To assess the response of lowland transplanted rice to intermittent irrigation vis-a-vis continuous submergence, field experiments were conducted at the Agricultural College, Killikulam during rubi seasons (Oct-Feb) of 1990 and 1991. The effect of partial substitution of inorganic nitrogen through bio fertilizers-azolla and blue green algae (BGA) - was also evaluated. The results indicated that rice yield was reduced by 3 to 19 per cent by intermittent irrigation compared to continuous submergence. The practice of irrigation immediately after disapperance of ponded water was most suitable under limited water supply. With this practice, the yield reduction was only marginal (3-5%) but it helped to save about 28.7 per cent of irrigation water compared to continuous submergence. Substitution of 25 per cent of inorganic nitrogen through inoculation of azolla or BGA maintained the grain yield of rice on par with the application of 100 per cent of N through inorganic fertilizers.
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Claims 5
Claim · model-written summary
Intermittent irrigation reduced rice yield by 3 to 19 per cent versus continuous submergence.
- Taxon
- rice
Oryza sativae0 - Treatment
- intermittent irrigatione0
- Outcome
- rice yielde0
- Direction
- reducede0
- Value
- 3 to 19 per cente0
- Comparator
- continuous submergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice yield was reduced by 3 to 19 per cent by intermittent irrigation compared to continuous submergence.”
Claim · model-written summary
Irrigating after ponded water disappeared limited yield reduction to 3-5%.
- Taxon
- RICEOryza sativat0
- Treatment
- irrigation immediately after disapperance of ponded watere0
- Outcome
- yield reductione0
- Direction
- reductione0
- Value
- 3-5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The practice of irrigation immediately after disapperance of ponded water was most suitable under limited water supply. With this practice, the yield reduction was only marginal (3-5%)”
t0“RICE”
Claim · model-written summary
The same irrigation practice saved about 28.7 per cent of irrigation water versus continuous submergence.
- Taxon
- RICEOryza sativat0
- Treatment
- irrigation immediately after disapperance of ponded watere0
- Outcome
- irrigation watere0
- Direction
- savee0
- Value
- 28.7 per cente0
- Comparator
- continuous submergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The practice of irrigation immediately after disapperance of ponded water was most suitable under limited water supply. With this practice, the yield reduction was only marginal (3-5%) but it helped to save about 28.7 per cent of irrigation water compared to continuous submergence.”
t0“RICE”
Claim · model-written summary
Replacing 25 per cent of inorganic N using azolla inoculation maintained grain yield on par with full inorganic N.
- Taxon
- riceOryza sativae0
- Treatment
- Substitution of 25 per cent of inorganic nitrogen through inoculation of azollae0
- Outcome
- grain yielde0
- Direction
- on pare0
- Comparator
- application of 100 per cent of N through inorganic fertilizerse0
AzollaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Substitution of 25 per cent of inorganic nitrogen through inoculation of azolla or BGA maintained the grain yield of rice on par with the application of 100 per cent of N through inorganic fertilizers.”
Claim · model-written summary
Replacing 25 per cent of inorganic N using BGA inoculation maintained grain yield on par with full inorganic N.
- Taxon
- riceOryza sativae0
- Treatment
- Substitution of 25 per cent of inorganic nitrogen through inoculation of azolla or BGAe0
- Interactor
- BGAe0symbiont
- Outcome
- grain yielde0
- Direction
- on pare0
- Comparator
- application of 100 per cent of N through inorganic fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Substitution of 25 per cent of inorganic nitrogen through inoculation of azolla or BGA maintained the grain yield of rice on par with the application of 100 per cent of N through inorganic fertilizers.”
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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.