Abstract
We investigated the effects of puddling on percolation and rice yields in rainfed lowland paddy cultivation. We selected a study village in Khammouane province, central Laos, and set up non-puddling and puddling plots from high to low positions. Even when puddling was conducted carefully, the ponding water in the plots disappeared in the case of little rainfall. Further, percolatifons during the later periods of rice growth increased drastically. Therefore, it is difficult to overcome drought stresses only by conducting puddling. We also compared the water conditions in the non-puddling and puddling plots. In the puddling plots at high position and low position along a stream, the number of days without ponding water in the puddling plots was less than that in the non-puddling field in July, suggesting the possibility of a different transplanting date. We tried to estimate the effects of transplanting date on the rice yields and found that transplanting 15 days earlier leads to an increase of 0.5 t/ha in the rice yields. Moreover, the profits from the increased yields exceed the puddling costs considerably, leading to a definite increase in income. Because the transplanting date has no effects in the fields with high ground water, puddling is effective in paddy fields where ponding does not occur to a significant degree.
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Claims 8
Claim · model-written summary
Ponding water disappeared under little rainfall even with careful puddling.
- Taxon
- rice
Oryza sativae0 - Treatment
- puddlinge1
- Outcome
- ponding water in the plots disappearede1
- Direction
- disappearede1
- Qualifier
- little rainfalle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“Even when puddling was conducted carefully, the ponding water in the plots disappeared in the case of little rainfall.”
Claim · model-written summary
Percolation increased drastically in later rice growth.
- Taxon
- riceOryza sativae1
- Organ / stage
- later periods of rice growthe1
- Outcome
- percolatifonse1
- Direction
- increased drasticallye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“percolatifons during the later periods of rice growth increased drastically”
Claim · model-written summary
High position puddled plots had fewer days without ponding in July than non-puddled plots.
- Taxon
- riceOryza sativae0
- Treatment
- puddling plots at high positione1
- Outcome
- number of days without ponding watere1
- Direction
- less thane1
- Qualifier
- in Julye1
- Comparator
- non-puddling fielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“In the puddling plots at high position and low position along a stream, the number of days without ponding water in the puddling plots was less than that in the non-puddling field in July”
Claim · model-written summary
Low position streamside puddled plots had fewer days without ponding in July than non-puddled plots.
- Taxon
- riceOryza sativae0
- Treatment
- low position along a streame1
- Outcome
- number of days without ponding watere1
- Direction
- less thane1
- Comparator
- non-puddling fielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“In the puddling plots at high position and low position along a stream, the number of days without ponding water in the puddling plots was less than that in the non-puddling field in July”
Claim · model-written summary
Transplanting rice 15 days earlier was estimated to increase yield by 0.5 t/ha.
- Taxon
- riceOryza sativae1
- Treatment
- transplanting 15 days earliere1
- Outcome
- rice yieldse1
- Direction
- increasee1
- Value
- 0.5 t/hae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“transplanting 15 days earlier leads to an increase of 0.5 t/ha in the rice yields”
Claim · model-written summary
Profits from increased yields exceeded puddling costs, increasing income.
- Taxon
- riceOryza sativae0
- Outcome
- incomee1
- Direction
- increasee1
- Comparator
- puddling costse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“the profits from the increased yields exceed the puddling costs considerably, leading to a definite increase in income”
Claim · model-written summary
Transplanting date had no effect in fields with high groundwater.
- Taxon
- riceOryza sativae0
- Treatment
- transplanting datee1
- Outcome
- no effectse1
- Direction
- no effectse1
- Qualifier
- fields with high ground watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“the transplanting date has no effects in the fields with high ground water”
Claim · model-written summary
The authors concluded that puddling is effective where ponding is limited.
- Taxon
- riceOryza sativae0
- Outcome
- puddling is effective in paddy fieldse1
- Qualifier
- where ponding does not occur to a significant degreee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percolation and rice yields”
e1“puddling is effective in paddy fields where ponding does not occur to a significant degree”
The same questions in other papers
transplanting · yield · Oryza sativa (rice)Positive and negative results
921 papers in the same direction as this paper · 132 in the opposite direction · 24 reporting no difference from an alternative
- positive
- no effect
- no effect
1,074 papers more in this group
See all 1,078 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.