Water balance of flooded rice paddies |
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| Authors: | KW Brown FT Turner JC Thomas LE Deuel ME Keener |
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| Institution: | 7. Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas 77843 U.S.A.;1. Texas Agricultural Experimental Station, Beaumont, Texas U.S.A. |
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| Abstract: | Rice (Oryza sativa L., var. Labelle) was grown in 300 m2 paddies of Beaumont clay soil (Typic pelludert) and subjected to two management schemes of flooded rice culture. These schemes were continuous irrigation and intermittent irrigation. Careful measurements of irrigation, precipitation, evapotranspiration, deep percolation and runoff were made, and the total water balance for the two water management schemes was calculated.The results show continuous irrigation to be very wasteful of water with slightly over 1 m of irrigation water applied to supply an evapotranspirational need of 0.5–0.6 m. The intermittent irrigation management is less wasteful but still could be improved upon. Suggestions are presented for techniques to help improve the water use efficiency and reduce runoff losses. |
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