English

Rodrigues Pereira José,Henrique Zonta João,Samara Araújo Barbosa De Almeida Érica,Renato Cortez Bezerra José,Pereira Araújo Whéllyson,Orlando Carvallo Guerra Hugo

doi:10.5897/ajar2016.12010

Abstract

The aim of this work was to evaluate the growth of sesame BRS 196 CNPA G4 in different irrigation depths (305, 436, 567 and 698 mm), applied on the basis of crop evapotranspiration– ETc (the depth of 567 mm was equal to 100% ETc). It was conducted at Embrapa Cotton, in Barbalha County, Ceara State, Brazil, 2012. The experiment was in randomized blocks, with treatments distributed in plots with three replications. The ETc was calculated by multiplying the reference evapotranspiration (ETo), determined by the Penman-Monteith method, by the crop coefficients (Kc), recommended for each phenological stage of the crop and by FAO. For the other irrigation treatments, the ETc was multiplied by 0.4, 0.7 and 1.3 (40, 70 and 130% of ETc). Primarily, height, stem diameter, leaf area and leaf area index were measured at 27, 48, 69 and 90 Days After Emergence (DAE), and then the absolute and relative growth rates in height, stem diameter and leaf area were estimated. It was concluded that height, stem diameter, leaf area and leaf area index of sesame BRS 196 CNPA G4 increased with irrigation; the highest growth occurred until 70 or 75 DAE, and the greatest growth was obtained, in general, in 698 mm of irrigation depth. Key words: Sesamum indicum L., evapotranspiration, growth rates, water stress.

Highlights

Sesame (Sesamum indicum L.), is considered economically underused (Were et al, 2006), by the International Plant Genetic Resources Institute (IPGRI)
It was concluded that height, stem diameter, leaf area and leaf area index of sesame BRS 196 CNPA G4 increased with irrigation; the highest growth occurred until 70 or 75 Days After Emergence (DAE), and the greatest growth was obtained, in general, in 698 mm of irrigation depth
This study aimed to evaluate the growth of sesame BRS 196 CNPA G4 in different irrigation depths applied on the basis of crop evapotranspiration (ETc)

Summary

Introduction

Sesame (Sesamum indicum L.), is considered economically underused (Were et al, 2006), by the International Plant Genetic Resources Institute (IPGRI). Since it supplements the natural rainfall, irrigation enables an increase of yield, especially in these regions (Farias et al, 2000). But not waterlogging, this means that, once established, it is resistant to high water pressure in the soil more than other crops, but it does not grow well with little water (Kim et al, 2006)

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