Strategies of irrigation scheduling in cowpea

Revista Brasileira de Engenharia Agrícola e Ambiental

Costa, Raimundo Nonato Távora²  Aguiar, José Vanglésio de²  Gondim, Rubens Sonsol¹ 

[1] UFC, Fortaleza

关键词: tensiometer;    Class A evaporation pan;    Vigna unguiculata L;   

DOI  :  10.1590/S1415-43662000000100003

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

A field study was conducted from September to December 1997 at the Federal University of Ceará Experimental Farm in Pentecoste, Brazil. The irrigation scheduling was based on a tensiometer, Class A pan evaporation and Hargreaves equation. The purpose of the research was to evaluate the three treatments (Treatment 1 - tensiometer, Treatment 2 - pan evaporation and Treatment 3 - Hargreaves equation) with four replications in a completely randomized design. Sprinkler irrigated cowpea (Vigna unguiculata (L.) Walp), cultivar João Paulo II for fresh consumption was grown on the experimental area. Plants were spaced at 0.90 x 0.40 m, maintaining two plants per hole. Crop yield showed no significant difference, although using the tensiometer to schedule irrigation, the water consumption was 28 and 30% lower compared to the Class A Pan Evaporation and Hargreaves equation, respectively. The tensiometer may be indicated as an instrument for saving water in irrigation scheduling.

【 授权许可】

CC BY-NC