Abstract
Abstract Rice is a semi-aquatic plant and grown under anaerobic condition as long as water is available. Nowadays, water scarcity and climate change issues need to be address with new technology to increase water use efficiency in rice production. In the other hand, rice varieties must be able to adapt climate change in the future, especially drought even during rice growth periods. A shallow water depth irrigation, as a strategy to reduce water use might influence the rice growth development. The aim of this study was to characterize the leaf area index development of three different rice varieties grown in continuous flooding and shallow water depth irrigation. Pot experiments were conducted in Yogyakarta, Indonesia with three different rice varieties, i.e Mutiara, IR 64, and Hitam, and cultivated with two different irrigation system namely shallow water depth (SWD) and continuous flooding (CF). Leaf Area Index (LAI) was measured every 10 days and polynomial equation was used to describe LAI development during plant growth. Analysis of variance (ANOVA) was performed using Ms. Excel to determine significant differences between treatments (p < 0.05). Pearson correlation coefficient (R) was used to evaluate the performance of mathematical model. Leaf Area Index (LAI) under shallow water depth irrigation in different rice varieties were not significantly different compare to continuous flooding irrigation. LAI development in different treatment were described by polynomial equation, with various correlation value, ranged between 0.46 – 0.88. IR64 variety under control irrigation resulted lowest R (0.46), indicated that prediction value from observation data was not strongly correlated. However, other treatments showed strong relationship between prediction and observation data.
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Claims 4
Claim · model-written summary
Shallow water depth irrigation did not significantly change rice leaf area index relative to continuous flooding.
- Taxon
- Rice
Oryza sativae1 - Treatment
- shallow water depth irrigatione0
- Outcome
- Leaf Area Index (LAI)e0
- Direction
- not significantly differente0
- Comparator
- continuous flooding irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf Area Index (LAI) under shallow water depth irrigation in different rice varieties were not significantly different compare to continuous flooding irrigation.”
e1“Rice is a semi-aquatic plant”
Claim · model-written summary
Polynomial equations described rice LAI development with correlations ranging from 0.46 to 0.88.
- Taxon
- RiceOryza sativae1
- Outcome
- correlation valuee0
- Value
- 0.46 – 0.88e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LAI development in different treatment were described by polynomial equation, with various correlation value, ranged between 0.46 – 0.88.”
e1“Rice is a semi-aquatic plant”
Claim · model-written summary
For IR64 under control irrigation, model correlation was the lowest at 0.46 and prediction was weakly correlated with observation.
- Taxon
- RiceOryza sativae1
- Material
- IR64e0
- Treatment
- control irrigatione0
- Outcome
- Re0
- Direction
- loweste0
- Value
- 0.46e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IR64 variety under control irrigation resulted lowest R (0.46), indicated that prediction value from observation data was not strongly correlated.”
e1“Rice is a semi-aquatic plant”
Claim · model-written summary
Other irrigation treatments showed a strong relationship between predicted and observed rice LAI.
- Taxon
- RiceOryza sativae1
- Outcome
- relationship between prediction and observation datae0
- Comparator
- other treatmentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“other treatments showed strong relationship between prediction and observation data.”
e1“Rice is a semi-aquatic plant”
The same questions in other papers
irrigation · growth · Oryza sativa (rice)Positive and negative results
68 papers in the same direction as this paper · 222 reporting no difference from an alternative
- positive
- positive
- positive
287 papers more in this group
See all 291 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.