Abstract
Alternate wetting and drying irrigation (AWD) has been reported to save water compared with continuous flooding (CF) in rice cultivation. However, the reported effects on yield varied greatly with soil type, cultivars, and detailed agrohydrological characterization is often lacking so that generalizations are difficult to make. This study quantified the impact of AWD on rice (Binadhan-8 and Binadhan-10) yield, water productivity and irrigation water savings. The irrigation treatments comprised of: Normal farmer’s practice (continuous ponding, 3-5 cm) [T1]; alternate wetting (irrigation by 5 cm) and drying (AWD) for 3 days after disappearance of ponded water (DOPW) [T2]; AWD for 5 days after DOPW [T3]; and a combination [T4].The grain yields varied from 3.9 to 4.4 t ha–1 with no significant difference in yield attributes (except 1000 grain wt.), grain yields and straw yields between AWD and CF. The productivity of water in AWDs was about 6 - 40% higher than that of CF, and the water savings in AWDs compared to CF were 22 – 35%. Alternate wetting and drying for 5 days can save substantial amount of irrigation water without sacrificing yield. This practice can be adopted for cultivating those cultivars for sustainable irrigation management.Keywords: Boro rice, Water management, Water productivity, Alternate wetting and drying irrigation.
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Claims 5
Claim · model-written summary
Grain yield ranged from 3.9 to 4.4 t ha–1.
- Taxon
- rice
Oryza sativat0 - Outcome
- grain yieldse0
- Value
- 3.9 to 4.4 t ha–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yields varied from 3.9 to 4.4 t ha–1”
t0“Boro rice”
Claim · model-written summary
AWD and CF did not significantly differ in yield attributes other than 1000 grain weight, grain yield, or straw yield.
- Taxon
- riceOryza sativat0
- Treatment
- AWDe0
- Outcome
- yield attributes (except 1000 grain wt.), grain yields and straw yieldse0
- Direction
- no significant differencee0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference in yield attributes (except 1000 grain wt.), grain yields and straw yields between AWD and CF”
t0“Boro rice”
Claim · model-written summary
AWD water productivity was about 6 - 40% higher than CF.
- Taxon
- riceOryza sativat0
- Treatment
- AWDse0
- Outcome
- productivity of watere0
- Direction
- highere0
- Value
- 6 - 40%e0
- Comparator
- CFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The productivity of water in AWDs was about 6 - 40% higher than that of CF”
t0“Boro rice”
Claim · model-written summary
AWD saved 22 – 35% water relative to CF.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water savings in AWDs compared to CF were 22 – 35%”
t0“Boro rice”
Claim · model-written summary
Authors recommend five days of AWD to save water without sacrificing yield.
- Taxon
- riceOryza sativat0
- Treatment
- Alternate wetting and drying for 5 dayse0
- Outcome
- save substantial amount of irrigation water without sacrificing yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alternate wetting and drying for 5 days can save substantial amount of irrigation water without sacrificing yield.”
t0“Boro rice”
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