Abstract
System of Rice Intensification (SRI) as an alternate rice cultivation methodology, developed in Madagascar 25 years ago, is gaining wider acceptance in many countries including India. SRI method claims to greatly enhance water productivity and grain yield. But there is lack of understanding of scientific principles underlying and synergetic effects of the principles followed in SRI, especially in Indian conditions. The present paper is intended to discuss about significance and necessity of SRI along with performance of SRI at about 25 locations across the country for a period of four years. SRI was found to record 7- 20% higher grain yield over the traditional irrigated transplanted rice in different agro-climatic situations of the country. SRI also recorded higher nutrient use efficiency without depleting soil available nutrients as compared to conventional transplantingafter two seasons of the study. The varieties having better tillering ability as well as hybrids (KRH 2, HRI 126, PHB 71 and DRRH 2) were found promising and recorded higher grain yield over the high-yielding varieties and scented cultivars with moderate tillering. Root volume, dry mass and dehydrogenase activity in soil enhanced by 7-25% (measure of microbial activity) were found to be higher in SRI, compared with conventional method. There was reduction in seed rate by 80%, nursery area also obviously, water requirement by 29% and growth duration by 8-12 days, thereby enhancing water productivity and per day productivity of rice cultivars in SRI, which also proved to be helpful in producing more seed for faster seed multiplication and also quality seed for higher productivity. Water saving alone should be a strong justification for the adoption of SRI wherever water is not abundant. Ther~ is a need for further enhancing the rice productivity in SRI by identifying suitable cultivars, modifying practices to suit local agro-climatic conditions and understanding long term synergic effects among different practices.
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Claims 13
Claim · model-written summary
SRI produced 7-20% higher grain yield than traditional irrigated transplanted rice.
- Taxon
- Rice
Oryza sativat0 - Treatment
- SRIe0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 7- 20%e0
- Comparator
- traditional irrigated transplanted ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SRI was found to record 7- 20% higher grain yield over the traditional irrigated transplanted rice in different agro-climatic situations of the country”
t0“Rice”
Claim · model-written summary
SRI had higher nutrient use efficiency than conventional transplanting.
- Taxon
- RiceOryza sativat0
- Treatment
- SRIe0
- Outcome
- nutrient use efficiencye0
- Direction
- highere0
- Comparator
- conventional transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SRI also recorded higher nutrient use efficiency without depleting soil available nutrients as compared to conventional transplantingafter two seasons of the study”
t0“Rice”
Claim · model-written summary
SRI did not deplete soil available nutrients after two seasons.
- Taxon
- RiceOryza sativat0
- Treatment
- SRIe0
- Outcome
- soil available nutrientse0
- Direction
- without depletinge0
- Comparator
- conventional transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SRI also recorded higher nutrient use efficiency without depleting soil available nutrients as compared to conventional transplantingafter two seasons of the study”
t0“Rice”
Claim · model-written summary
Better tillering varieties and named hybrids had higher grain yield than moderate tillering varieties and scented cultivars.
- Taxon
- RiceOryza sativat0
- Material
- varieties having better tillering abilitye0
- Outcome
- grain yielde0
- Direction
- highere0
- Comparator
- high-yielding varieties and scented cultivars with moderate tilleringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The varieties having better tillering ability as well as hybrids (KRH 2, HRI 126, PHB 71 and DRRH 2) were found promising and recorded higher grain yield over the high-yielding varieties and scented cultivars with moderate tillering”
t0“Rice”
Claim · model-written summary
SRI had greater root volume and dry mass than the conventional method.
- Taxon
- RiceOryza sativat0
- Treatment
- SRIe0
- Outcome
- Root volume, dry masse0
- Direction
- highere0
- Value
- 7-25%e0
- Comparator
- conventional methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root volume, dry mass and dehydrogenase activity in soil enhanced by 7-25% (measure of microbial activity) were found to be higher in SRI, compared with conventional method”
t0“Rice”
Claim · model-written summary
SRI had higher soil dehydrogenase activity than conventional management.
- Taxon
- RiceOryza sativat0
- Treatment
- SRIe0
- Outcome
- dehydrogenase activity in soile0
- Direction
- highere0
- Value
- 7-25%e0
- Comparator
- conventional methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root volume, dry mass and dehydrogenase activity in soil enhanced by 7-25% (measure of microbial activity) were found to be higher in SRI, compared with conventional method”
t0“Rice”
Claim · model-written summary
SRI reduced seed rate by 80%.
- Taxon
- RiceOryza sativat0
- Treatment
- System of Rice Intensificationt1
- Outcome
- seed ratee0
- Direction
- reductione0
- Value
- 80%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was reduction in seed rate by 80%”
t0“Rice”
t1“System of Rice Intensification”
Claim · model-written summary
SRI reduced water requirement by 29%.
- Taxon
- RiceOryza sativat0
- Treatment
- System of Rice Intensificationt1
- Outcome
- water requiremente0
- Direction
- reductione1
- Value
- 29%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water requirement by 29%”
e1“There was reduction in seed rate by 80%, nursery area also obviously, water requirement by 29% and growth duration by 8-12 days”
t0“Rice”
t1“System of Rice Intensification”
Claim · model-written summary
SRI reduced growth duration by 8-12 days.
- Taxon
- RiceOryza sativat0
- Treatment
- System of Rice Intensificationt1
- Outcome
- growth duratione0
- Direction
- reductione1
- Value
- 8-12 dayse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth duration by 8-12 days”
e1“There was reduction in seed rate by 80%, nursery area also obviously, water requirement by 29% and growth duration by 8-12 days”
t0“Rice”
t1“System of Rice Intensification”
Claim · model-written summary
SRI reduced nursery area.
- Taxon
- RiceOryza sativat0
- Treatment
- System of Rice Intensificationt1
- Outcome
- nursery areae0
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nursery area also obviously”
e1“There was reduction in seed rate by 80%, nursery area also obviously, water requirement by 29% and growth duration by 8-12 days”
t0“Rice”
t1“System of Rice Intensification”
Claim · model-written summary
SRI enhanced water and per day productivity.
- Taxon
- riceOryza sativae0
- Treatment
- SRIe0
- Outcome
- water productivity and per day productivitye0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“thereby enhancing water productivity and per day productivity of rice cultivars in SRI”
Claim · model-written summary
SRI helped produce more and higher quality seed.
- Taxon
- RiceOryza sativat0
- Outcome
- producing more seed for faster seed multiplication and also quality seed for higher productivitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“which also proved to be helpful in producing more seed for faster seed multiplication and also quality seed for higher productivity”
t0“Rice”
Claim · model-written summary
The authors recommend SRI where water is scarce.
- Taxon
- RiceOryza sativat0
- Outcome
- adoption of SRI wherever water is not abundante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water saving alone should be a strong justification for the adoption of SRI wherever water is not abundant”
t0“Rice”
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