A study on Potential Evapotranspiration and Water Requirement for Baby Corn Production

Abstract

A study on the Potential Evapotranspiration (ETp) values and an experiment on the response of baby corn cv. Suwan 2 which was subjected to different quantities of irrigation water in accordance with the ratios of ET/E (i.e., 0.6, 0.8, 1.0, and 1.2) were conducted at the National Corn and Sorghum Research Center, Pakchong, Nakornratchasima during July 1987 to September 1988. The result showed that the average ETp value from Lysimeter, constant water table type, in 1988 was ranging from 4.23 to 4.47 for dry season, 5.48 to 5.62 for summer and 4.10 to 5.36 mm/day for rainy season. These values were equivalent to 78.8, 77.6 and 80.5% of evaporation values from Pan (American Class A Pan) in the same period, respectively. Average yield with husk, cob weight, the number of ear per plant, conversion ratio and plant height of baby corn cv. Suwan 2 were responded to the amount of irrigated water when the value of ET/E is equivalent to 1.0. Days to tasseling, days to silking, husk weight and stalk were not different among treatment. In addition, the leaf number per plant was relatively the same at each growth stage, while the plant height was statistically different from 6 weeks onwards to flowering stage. These characters responded to treatments on the ET/E value = 1.0