Abstract
Variations in the phenology and degree days of five fine rice cultivars viz., Rajshahi swarna, Silkumul, Kataribhog, Lal pajam and Sanla under organic and inorganic cultural conditions were studied following a split plot design. The requirement of days to attain various phenological stages was highest in Rajshahi swarna, medium in Silkumul, Kataribhog and Lal pajam and the lowest in Sanla for both the cultural conditions. The growing degree days (GDD) and heat use efficiency (HUE) were slightly higher under inorganic than organic culture because of higher life span of rice cultivars in inorganic culture. The highest GDD and HUE were found in Rajshahi swarna, whereas the lowest in Sanla. Results also showed that the requirement of days and GDD were initially higher up to maximum tillering stage under organic culture but thereafter these requirements were greater under inorganic culture for all the cultivars. The grain yield was somewhat lower in organic compared to inorganic culture. In Rajshahi highest grain yield of swarna was 2.90 and 2.74 t/ha under inorganic and organic culture, respectively. Key words: Phenology; Growing degree days; Heat use efficiency; Fine rice DOI: http://dx.doi.org/10.3329/bjb.v40i2.9770 Bangladesh J. Bot. 40(2): 149-153, 2011 (December)
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Claims 7
Claim · model-written summary
Days required to reach phenological stages were highest in Rajshahi swarna and lowest in Sanla under both cultural conditions.
- Taxon
- rice
Oryza sativat0 - Material
- Rajshahi swarnae1
- Treatment
- cultural conditionse1
- Outcome
- requirement of days to attain various phenological stagese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e1“The requirement of days to attain various phenological stages was highest in Rajshahi swarna, medium in Silkumul, Kataribhog and Lal pajam and the lowest in Sanla for both the cultural conditions”
Claim · model-written summary
Growing degree days and heat use efficiency were slightly higher under inorganic than organic culture in rice.
- Taxon
- riceOryza sativae2
- Treatment
- inorganice2
- Outcome
- growing degree days (GDD) and heat use efficiency (HUE)e2
- Direction
- highere2
- Qualifier
- slightlye2
- Comparator
- organic culturee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The growing degree days (GDD) and heat use efficiency (HUE) were slightly higher under inorganic than organic culture because of higher life span of rice cultivars in inorganic culture”
Claim · model-written summary
Growing degree days and heat use efficiency were highest in Rajshahi swarna and lowest in Sanla in rice.
- Taxon
- riceOryza sativat0
- Material
- Rajshahi swarnae3
- Outcome
- GDD and HUEe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e3“The highest GDD and HUE were found in Rajshahi swarna, whereas the lowest in Sanla”
Claim · model-written summary
In rice, the requirement of days and growing degree days was initially higher under organic culture up to the maximum tillering stage than under inorganic culture.
- Taxon
- riceOryza sativat0
- Organ / stage
- maximum tillering stagee4
- Treatment
- organic culturee4
- Outcome
- requirement of days and GDDe4
- Direction
- highere4
- Comparator
- inorganic culturee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e4“Results also showed that the requirement of days and GDD were initially higher up to maximum tillering stage under organic culture but thereafter these requirements were greater under inorganic culture for all the cultivars”
Claim · model-written summary
After maximum tillering, the requirements for days and growing degree days were greater under inorganic culture in rice.
- Taxon
- riceOryza sativat0
- Treatment
- inorganic culturee4
- Outcome
- these requirementse4
- Direction
- greatere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e4“Results also showed that the requirement of days and GDD were initially higher up to maximum tillering stage under organic culture but thereafter these requirements were greater under inorganic culture for all the cultivars”
Claim · model-written summary
Grain yield of rice was somewhat lower under organic than inorganic culture.
- Taxon
- riceOryza sativat0
- Treatment
- organice5
- Outcome
- grain yielde5
- Direction
- somewhat lowere5
- Comparator
- inorganic culturee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e5“The grain yield was somewhat lower in organic compared to inorganic culture.”
Claim · model-written summary
Rajshahi swarna gave the highest grain yield of 2.90 and 2.74 t/ha under inorganic and organic culture, respectively.
- Taxon
- riceOryza sativat0
- Material
- swarnae6
- Treatment
- inorganic and organic culturee6
- Outcome
- grain yielde6
- Value
- 2.90 and 2.74 t/hae6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Phenology and degree days of rice cultivars under organic culture”
e6“In Rajshahi highest grain yield of swarna was 2.90 and 2.74 t/ha under inorganic and organic culture, respectively”
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cultivation system · yield · Oryza sativa (rice)Positive and negative results
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