000			02501nam a22003137a 4500
003			OSt
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008			250904b |||||||| |||| 00| 0 eng d
040			_cDSSC
082			_aPer 551.6 F39 2018
100			_aFernandez, Cyra Gail P. _912920
130			_aPhilippine Journal of Agricultural and Biosystems Engineering _912184
245			_aDetermining the effect of climate change on seasonal crop water requirements of irrigated lowland rice (Oryza sativa) under different climatic environments / _cCyra Gail P. Fernandez, Ronaldo B. Saludes, Moises A. Dorado and Pompe C. Sta Cruz
300			_apages 19-30 _bcoll. ill. : _c23cm.
336			_atext
337			_aunmediated
338			_avolume
440			_v14(2018) _x0119-7312
500			_aChanges in temperature and rainfall pattern can lead to negative impacts on crop production. Limited water resources for agricultural production can also lead to a considerable yield reduction. In this study, climate productions at different greenhouse gas emission scenarios were used in determining the effect of climate change on seasonal crop water requirement (CWR) and irrigation requirement (IR) of lowland rice at different climatic environments. Climate projections from year 2020 to 2059 were generated using MarkSim. Crop evapotranspiration and irrigation requirements of lowland rice were simulated using FAO CROPWAT. Analysis of projected maximum and minimum temperatures and rainfall showed increasing trend through time. Seasonal CWR and IR showed highest projected change at 2050. Highest projected change in CWR during wet and dry seasons were 4.01% and 3.84% in Muñoz, Nueva Ecija, 3.30% and 3.54% in Los Baños, Laguna and 4.12% and 4.34% in Cabagan, Isabela, respectively. Highest projected change in IR during wet and dry seasons were 10.16% and 1.38% in Muñoz, 22.81% and 4.7% in Los Baños and 5.07% and 7.44% in Cabagan, respectively. The results showed that the irrigation requirements must be considered in improving the capacity of irrigation systems to satisfy the increasing water demand of rice brought about by climate change.
650		0	_acrop water requirement _912921
650		0	_aClimate change _912923
650		0	_aIrrigation requirement _912922
650		0	_aFAO CROPWAT _912924
650		0	_aIrrigated lowland rice _912925
700			_aSaludes, Ronaldo B. _912926
700			_aSta Cruz, Pompe C. _912928
700			_aDorado, Moises A. _912927
942			_2ddc _cPINDEX
999			_c9210 _d9210