Dry matter accumulation and water requirements of maize (Zea mays L.)
2000
Aslam, M. | Ikram, M. | Hashmi, N.I. | Majid, A. (National Agricultural Research Centre, Islamabad (Pakistan). Wheat Programme)
Dry matter accumulation pattern and water requirements of maize (Zea mays L.) experiments were studied during kharif 1992 and 1993 on a loam soil having pH of 8.0. Maize showed sigmoid response curve for dry matter accumulation vs. days after planting. Crop growth rates were high from 9th leaf stage to grain formation during both years. Water requirements of maize were determined by using climatological approach. Water requirements for maize growth cycle were expressed on dekad basis. Total water requirements varied depending on crop growth, potential evapotranspiration and crop coefficients. The total water requirements for maize were 382.8 mm from sowing upto its physiological maturity. However, when it was harvested as fodder at milk stage, water requirements were 367.9 mm. Overall rainfall was more than the water requirements of maize under rainfed condition of Islamabad.
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