Open Access

ARTICLE

CO₂ Assimilation Rate in Production Systems for Papaya Crops

by R. Ariza-Flores¹, D. Trujillo-García², M. A. Otero-Sánchez², E. Canales Sosa², C. H. Avendaño-Arrazate^3,*, L. A. Gálvez-Marroquín⁴, P. Cadena Iñiguez⁵

1 Iguala Experimental Station, National Institute of Forest, Agricultural and Livestock Research (INIFAP), Iguala, CP. 40000, México
2 Superior Agricultural College of the State of Guerrero, Iguala, Guerrero.CP. 40000, México
3 Rosario Izapa Experimental Station-INIFAP, Tuxtla Chico, Chiapas.CP. 30870, México
4 Valles Centrales Experimental Station-INIFAP, Oaxaca, Oaxaca.CP. 68200, México
5 Centro de Chiapas Experimental Station–INIFAP, Ocozocoautla, Chiapas.CP. 29140, México

* Corresponding Author: C. H. Avendaño-Arrazate. Email:

Phyton-International Journal of Experimental Botany 2021, 90(3), 933-947. https://doi.org/10.32604/phyton.2021.013227

Received 28 July 2020; Accepted 16 November 2020; Issue published 30 March 2021

Abstract

The aim of this study was to evaluate some physiological aspects of papaya crops in semi conventional and organic production systems. The following factors assessed in this experiment were: 1. Production systems (organic and semi conventional); 2. Genotypes (Maradol and Maradona F1), and 3. Cover crop plants (Canavalia, vegetative cover and no cover). Twelve treatments were obtained -product of factors’ combination- and distributed under a threerepetition experimental design of subdivided parcels. The factors examined in this study, that changed the CO₂ assimilation rate, were production system and genotype. It was determined that the greatest gas exchange in papaya crops happened at 13:40 h but achieving the highest CO₂ assimilation was also affected by the production system and genotype. Similarly, they showed some effects in CO₂ assimilation, transpiration, stomatal conductance, intercellular CO₂, leaf temperature, chlorophyll, and temperature. In general, the combination of factors that accentuated in this experiment were the semi conventional-Maradona-Canavalia with a crop yield of 53.5 t ha^-1, followed by treatments organic-Maradona-no cover and semi conventional-Maradona-vegetative cover.

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Keywords

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