|Author:||Wiedenfeld, R. P.|
|Book Group Author:||NA|
Water for agricultural irrigation is becoming increasingly limited and, therefore, must be used as efficiently as possible. Sugarcane is a high biomass crop requiring lots of water. A field study was conducted to determine water requirements and crop water use by applying different levels of water. These were achieved by varying crop coefficients used with reference evapotranspiration to determine irrigation scheduling. Sugarcane yield responses to different water levels varied annually. The irrigation level producing maximum yields was not the same each year. Total water input including rainfall and irrigation to achieve maximum yields varied from 973 to 1328 mm/y; while water use efficiency (fresh weight of cane produced per unit of water uptake) varied from 6.0 to 11.7 tonnes cane/ML of water. These results suggest that the amount of water required to produce maximum yields in the Lower Rio Grande Valley of Texas may be less than the amount theoretically used by this crop under ideal conditions as reflected in the established crop coefficient curves. Deficit irrigation may lower yields, but may increase the amount of cane produced per unit of water used by the crop.
crop yield, irrigation, irrigation systems, plant waterrelations, soil water content, sugarcane, water uptake, water use, wateruse efficiency, Texas, USA, Saccharum, Saccharum officinarum, Saccharum,Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, Southern Plains States of USA, West South Central States ofUSA, Southern States of USA, USA, North America, America, DevelopedCountries, OECD Countries, Great Plains States of USA, Gulf States ofUSA, United States of America, watering, Field Crops (FF005) (New March2000), Plant Physiology and Biochemistry (FF060), Plant Water Relations(FF062), Plant Production (FF100), Soil Physics (JJ300), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]