Abstract
Summary Four isolates of Azolla pinnata collected from Bangkok, Bangladesh, Vietnam and India grew well when used in paddy fields both before and after transplanting with rice varieties of different heights and times to maturity. Azolla increased plant height, tillering, 1000-grain weight, grain and straw yields, nitrogen concentration and uptake, and soil fertility. The response of rice to Azolla was similar to that obtained by applying 60 kg N ha −1 as urea in three split applications. The different Azolla isolates differed in their growth, N 2 -fixation and response to rice crops and soil fertility. All these characteristics were better in the isolates from Bangkok and Vietnam than in those from Bangladesh and India. Azolla growth and N 2 -fixation were better with short rice varieties (IR-36, Ratna and Kalinga-II) than with Mahsuri, a tall rice variety, but Mahsuri, having a longer growing season, showed a better response to Azolla .
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Claims 9
Claim · model-written summary
Four Azolla isolates grew well in paddy fields before and after rice transplanting.
- Taxon
- Azolla pinnata
Azolla pinnatae0 - Outcome
- grew welle0
- Setting
- paddy fieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Four isolates of Azolla pinnata collected from Bangkok, Bangladesh, Vietnam and India grew well when used in paddy fields both before and after transplanting with rice varieties of different heights and times to maturity.”
Claim · model-written summary
Azolla increased rice plant height, tillering and 1000-grain weight.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Azollae0
- Outcome
- plant height, tillering, 1000-grain weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla increased plant height, tillering, 1000-grain weight, grain and straw yields, nitrogen concentration and uptake, and soil fertility.”
t0“Rice”
Claim · model-written summary
Azolla increased rice grain and straw yields.
- Taxon
- RiceOryza sativat0
- Treatment
- Azollae0
- Outcome
- grain and straw yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla increased plant height, tillering, 1000-grain weight, grain and straw yields, nitrogen concentration and uptake, and soil fertility.”
t0“Rice”
Claim · model-written summary
Azolla increased rice nitrogen concentration and uptake.
- Taxon
- RiceOryza sativat0
- Treatment
- Azollae0
- Outcome
- nitrogen concentration and uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla increased plant height, tillering, 1000-grain weight, grain and straw yields, nitrogen concentration and uptake, and soil fertility.”
t0“Rice”
Claim · model-written summary
Azolla increased soil fertility.
- Taxon
- RiceOryza sativat0
- Treatment
- Azollae0
- Outcome
- soil fertilitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla increased plant height, tillering, 1000-grain weight, grain and straw yields, nitrogen concentration and uptake, and soil fertility.”
t0“Rice”
Claim · model-written summary
Rice response to Azolla resembled response to 60 kg N ha −1 as urea.
- Taxon
- riceOryza sativae0
- Outcome
- responsee0
- Comparator
- 60 kg N ha −1 as ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of rice to Azolla was similar to that obtained by applying 60 kg N ha −1 as urea in three split applications.”
Claim · model-written summary
Bangkok and Vietnam Azolla isolates had better growth, nitrogen fixation and rice responses than Bangladesh and India isolates.
- Material
- isolates from Bangkok and Vietname0
- Outcome
- growth, N 2 -fixation and response to rice crops and soil fertilitye0
- Direction
- bettere0
- Comparator
- those from Bangladesh and Indiae0
AzollaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The different Azolla isolates differed in their growth, N 2 -fixation and response to rice crops and soil fertility. All these characteristics were better in the isolates from Bangkok and Vietnam than in those from Bangladesh and India.”
Claim · model-written summary
Azolla growth and nitrogen fixation were better with short rice varieties than with Mahsuri.
- Material
- short rice varieties (IR-36, Ratna and Kalinga-II)e0
- Outcome
- Azolla growth and N 2 -fixatione0
- Direction
- bettere0
- Comparator
- Mahsurie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla growth and N 2 -fixation were better with short rice varieties (IR-36, Ratna and Kalinga-II) than with Mahsuri, a tall rice variety”
Claim · model-written summary
Mahsuri rice responded better to Azolla.
Verbatim
e0“Mahsuri, having a longer growing season, showed a better response to Azolla”
The same questions in other papers
Azolla · yield · Oryza sativa (rice)Positive and negative results
42 papers in the same direction as this paper · 1 in the opposite direction · 3 reporting no difference from an alternative
- positive
- no effect
- no effect
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See all 47 papers →Azolla · soil: chemistry · Oryza sativa (rice)Results agree
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- positive
- positive
- positive
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See all 7 papers →Azolla · nutrient: content · Oryza sativa (rice)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
See all 14 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.