Performance of Cowpea under Different Water Regimes in Amazonian Conditions

Horticulturae

Joyse Tatiane Souza Santos¹  Vivian Dielly da Silva Farias¹  Marcus José Alves de Lima²  João Vitor de Novoa Pinto²  Hildo Giuseppe Garcia Caldas Nunes²  Vandeilson Belfort Moura²  Igor Cristian de Oliveira Vieira²  Denilson Pontes Ferreira²  Adriano Marlisom Leão de Sousa²  Ewelyn Regina Rocha Silva²  Paulo Jorge de Oliveira Ponte de Souza²  Jaime Borges da Cunha Junior²  Helane Cristina Aguiar Santos²  Lucas Tavares Belém²  Denis de Pinho Sousa²  Gabriel Siqueira Tavares Fernandes²  William Lee Carrera de Aviz² 

[1] Grupo de Pesquisa Interações Solo Planta Atmosfera da Amazônia, Agronomy Department, Universidade Federal do Pará, Av. Cel. José Porfírio 2515, Altamira 68372-040, PA, Brazil;Grupo de Pesquisa Interações Solo Planta Atmosfera da Amazônia, Programa de Pós Graduação em Agronomia, Universidade Federal Rural da Amazônia, Avenida Presidente Tancredo Neves 2501, Belém 66077-830, PA, Brazil;

关键词: evapotranspiration;    climate;    irrigation;    production components;    productivity;    Vigna ungüiculata;   

DOI  :  10.3390/horticulturae8040335

来源: DOAJ

【 摘 要 】

Water availability is a crucial factor in the final productivity of cowpea. The objective of this work was to evaluate the production and productivity components of cowpea under different irrigation depths in Amazonian conditions. The experiment was carried out at the School Farm of the Federal Rural University of Amazonia, in the municipality of Castanhal-PA, using the cultivar BR3 Tracuateua, from September to November 2014, 2015, and 2016. The experimental design was conducted on six blocks and four treatments, where the four irrigation depths of 0, 25, 50, and 100% of crop evapotranspiration were tested. The productivity analysis was performed when 90% of the plants were in the phenological stage R9. The evaluated production components were pod length, number of pods per plant, number of grains per pod, mass of one hundred grains, and harvest index. There was a statistical difference among all treatments for the components of production and among productivities. An average reduction of 827 kg ha⁻¹ in cowpea productivity was observed during the three years of study, when the treatment without irrigation was compared with the treatment irrigated with 100% of the crop’s water demand. It was found in this research that the simple fulfillment of the nutritional and phytosanitary demands of the crop, associated with an adequate planning of when to plant in the region, would already help in the improvement of local production when choosing times where the water deficit in the reproductive phase is less than 33 mm.

【 授权许可】

Unknown