Abstract
Air and water temperatures are important climatic variables influencing rice yields through the interaction of pests and nutrients. The Philippine Rice Research Institute (PhilRice) in Maligaya, central region of Luzon island, stated that the Philippines could attain rice sufficiency if farmers' average yield increases to at least 1 t/ha. It is generally said that decreasing the minimum air temperature in the rice canopy could make a yield increase possible in the Philippines. Instead, results showed that the timing of irrigation water application using a shallow tubewell pump in Maligaya could not decrease canopy air temperature. However, the temperature of the standing or flooding water in the field was reduced using pumped water or ground water irrigation compared with the conventional irrigation where water came from irrigation canals, and the lower temperature of the standing water resulted in an increase in rice yield from 7.27 to 8.58 t/ha for PSB Rc28 rice cultivar and from 3.08 to 4.02 t/ha for New Plant Type IR66106-5-3-2-3. Based on this result, this study recommends that rice growers irrigate using pumped water or ground water from 15: 00 to 17: 00 with a standing water level of 5 cm during the reproductive stage to have a lower water temperature at night for better efficiency of water and resistance to white heads.
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Claims 5
Claim · model-written summary
Pumped or ground water irrigation reduced the temperature of standing water in the field compared with conventional irrigation.
Verbatim
t0“Paddy Rice”
e0“the temperature of the standing or flooding water in the field was reduced using pumped water or ground water irrigation compared with the conventional irrigation where water came from irrigation canals”
Claim · model-written summary
Pumped or ground water irrigation increased rice yield of PSB Rc28 from 7.27 to 8.58 t/ha compared with conventional irrigation.
- Taxon
- rice
Oryza sativae2 - Material
- PSB Rc28e2
- Treatment
- pumped water or ground water irrigatione0
- Outcome
- rice yielde2
- Direction
- increasee2
- Value
- from 7.27 to 8.58 t/hae2
- Comparator
- conventional irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the temperature of the standing or flooding water in the field was reduced using pumped water or ground water irrigation compared with the conventional irrigation where water came from irrigation canals”
e2“the lower temperature of the standing water resulted in an increase in rice yield from 7.27 to 8.58 t/ha for PSB Rc28 rice cultivar and from 3.08 to 4.02 t/ha for New Plant Type IR66106-5-3-2-3”
Claim · model-written summary
Pumped or ground water irrigation increased rice yield of New Plant Type IR66106-5-3-2-3 from 3.08 to 4.02 t/ha compared with conventional irrigation.
- Taxon
- riceOryza sativae2
- Material
- New Plant Type IR66106-5-3-2-3e2
- Treatment
- pumped water or ground water irrigatione0
- Outcome
- rice yielde2
- Direction
- increasee2
- Value
- from 3.08 to 4.02 t/hae2
- Comparator
- conventional irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the temperature of the standing or flooding water in the field was reduced using pumped water or ground water irrigation compared with the conventional irrigation where water came from irrigation canals”
e2“the lower temperature of the standing water resulted in an increase in rice yield from 7.27 to 8.58 t/ha for PSB Rc28 rice cultivar and from 3.08 to 4.02 t/ha for New Plant Type IR66106-5-3-2-3”
Claim · model-written summary
Rice growers should irrigate with pumped or ground water from 15:00 to 17:00 with a 5 cm standing water level during the reproductive stage.
- Taxon
- riceOryza sativae3
- Organ / stage
- reproductive stagee3
- Outcome
- irrigate using pumped water or ground water from 15: 00 to 17: 00e3
- Value
- 5 cme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“this study recommends that rice growers irrigate using pumped water or ground water from 15: 00 to 17: 00 with a standing water level of 5 cm during the reproductive stage”
Claim · model-written summary
The timing of irrigation water application with a shallow tubewell pump did not decrease canopy air temperature.
- Taxon
- paddy ricet0
- Treatment
- timing of irrigation water application using a shallow tubewell pumpe1
- Outcome
- canopy air temperaturee1
- Direction
- could not decreasee1
Not reportedComparator
Verbatim
t0“Paddy Rice”
e1“results showed that the timing of irrigation water application using a shallow tubewell pump in Maligaya could not decrease canopy air temperature”
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