Yield and water use efficiency of cauliflower under irrigation different levels in tropical climate

Autor: Charles Campoe Martim, Suzana Grassi da Silva, Adriana Aki Tanaka, Adilson Pacheco de Souza, Andréa Carvalho da Silva, Rafaella Teles Arantes Felipe, Mariana Pizzatto, Manoel Euzébio de Souza, Brena Geliane Ferneda
Rok vydání: 2018
Předmět:
Zdroj: African Journal of Agricultural Research. 13:1621-1632
ISSN: 1991-637X
DOI: 10.5897/ajar2018.13186
Popis: The aim of the present study is to assess the effects of different irrigation blades on the growth and yield of cauliflower cv. Verona CMS. The plants were cultivated in Red-yellow Latosol during the dry period (winter-spring 2014 and 2015), in the Cerrado-Amazon transition region, Middle-Northern of Mato Grasso State, Brazil. The reference evapotranspiration (ETo) was recorded through the Class A pan method by using tank coefficient of (Kp) 0.7795. We assessed the blades of 40, 60, 80, 100 and 120% evapotranspiration of the culture (ETc) by taking into account the cultivation coefficients (Kc) of 0.70 and 0.95 in the vegetative and reproductive phases. With regard to the morphometric variables of the plants (height, stem diameter and number of leaves) there were no significant interactions between assessment time (days after planting) and irrigation blades throughout the crop years. The hydric response functions presented higher yield at repositions from 80% to 100% of ETc. Variations in the irrigation blade did not influence the thermal demands for the inflorescence differentiation period or the inflorescence shape. Increased irrigated blade reduced water use efficiency: 7.4 and 12.4 kg of fresh mass per m³ of irrigated water. Key words: Irrigation management, water response function, degree-days, evapotranspiration.
Databáze: OpenAIRE
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