Gas exchange, growth and yield of cowpea genotypes under different irrigation strategies
| Autor: | Roberto Cleiton Fernandes de Queiroga, Marcos Eric Barbosa Brito, Francisco Hevilásio Freire Pereira, Luderlândio de Andrade Silva, Carlos Jardel Andrade Oliveira, Rã mulo Carantino Lucena Moreira, Franciscleudo Bezerra da Costa, Luciano Jonatas Gomes Frade |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Irrigation Crop yield Sowing 04 agricultural and veterinary sciences Biology biology.organism_classification 01 natural sciences Vigna Agronomy Evapotranspiration 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Dry matter Water-use efficiency General Agricultural and Biological Sciences Water use 010606 plant biology & botany |
| Zdroj: | African Journal of Agricultural Research. 11:2286-2294 |
| ISSN: | 1991-637X |
| DOI: | 10.5897/ajar2016.11221 |
| Popis: | Water availability is a major limiting factor for cowpea bean crops, especially in semiarid regions, where it is necessary to adopt more productive and tolerant genotypes and efficient strategies for water use. Thus, an experiment was carried under field conditions in the semiarid region of Pombal city, PB, Brazil. Using a completely randomised blocks design experiment and four replications, in a factorial scheme. The first factor was formed by four cowpea beans genotypes (Costela de Vaca, Pingo-de-Ouro, Paulistinha and BRS Marataoa), and the second factor consisted of five different irrigation strategies (40, 60, 80, 100 and 120% of actual evapotranspiration (ETr)). Gas exchange was evaluated at the V4 stage, dry biomatter formation at the R2 stage and crop yield until 90 days after sowing. The gas exchange from cowpea genotypes was reduced by lower irrigation amounts. For dry biomass formation, greater values in the Pingo-de-Ouro genotype were observed when irrigated with 120% of ETr. Thus, the treatment of 120% ETr improved the growth in dry matter independently of the genotype. The Costela de Vaca genotype had better CO2 assimilation rates. Paulistinha had the highest productivity among genotypes, and Costela de Vaca had the greatest water use efficiency. Key words: Assimilation rate, Vigna unguiculata, water productivity. |
| Databáze: | OpenAIRE |
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