Calendários de irrigação para as culturas do feijão e do tomate em vários ecossistemas do Ceará.

Abstract

To find the water requirements and the optimal and practical irrigation schedulings of bean and tomato crops CROPWAT software (FAO) was used. Soil and climatic data from 5 different regions in the state of Ceará-Brazil were used. The results showed, at first, an impracticability to use irrigation in the soils analysed from Aracati and Paraipaba for both crops. In Juazeiro do Norte the tomato crop irrigation is impractible. On the other hand, the bean crop practical irrigation scheduling recommend irrigation intervals (TR) of 4 days and fixed net gift (LLf) of 20 mm. In Tauá, the bean crop practical irrigation scheduling can use 6/6/5/6 days of TR (5 days in stage C) and LLf of 33 mm. The tomato crop one recommend 4 days of TR and LLf of 29 mm. In Pentecoste, a TR of 11 days with LLf of 55 mm can be adopted to bean crop and a TR of 8 days with LLf of 50 mm can be adopted to tomato crop.