Abstract
The analysis of leaf pigments helps to understand the behavior of plant species under stress conditions. Thus, the objective of this study was to evaluate the amount of leaf pigments in SJ-02 cocoa seedlings under different irrigation depths and cultivation containers. The experiment took place at the Federal Institute of Espírito Santo, Campus Itapina, in Colatina, a city located in the northwest of the State of Espírito Santo, Brazil. A total of 144 seedlings were used, distributed in a completely randomized design, in a factorial scheme (6 × 3), where the first factor consisted of six different irrigation depths: 4; 6; 8; 10; 12 and 14 mm d-1 and the second one consisted of three different cultivation containers: polypropylene bags with dimensions of 10 × 20, 15 × 25 and 13 × 35, totalling 18 treatments, with eight repetitions. Seventy-four days after sowing, total chlorophyll content, flavonoid index and anthocyanin index were evaluated. There was no interaction between the factors studied. The 7 mm d-1 irrigation depth is the most suitable because it is practical in water management. Significance was not observed between the different cultivation containers.
Highlights
Brazil stands out as the sixth largest world producer of cocoa (Theobroma cacao L.) with a total of 250,308 tons produced in 2018 (Agrianual, 2017; IBGE, 2019)
Vol 12, No 10; 2020 addition to the chlorophyll content present in plants can be a useful tool to understand the behavior of plant species under stress conditions (Berilli et al, 2016; Oliveira et al, 2020)
Facing the notorious importance of the cocoa crop, the objective of this study was to understand the behavior of the total chlorophyll content, flavonoid index and anthocyanin index in SJ-02 cocoa seedlings under different irrigation depths and sowing containers
Summary
Brazil stands out as the sixth largest world producer of cocoa (Theobroma cacao L.) with a total of 250,308 tons produced in 2018 (Agrianual, 2017; IBGE, 2019). Their use is closely related to the cost of seedling production, as it affects the amount of substrate and inputs to be used and requires physical space in the nursery and labor for handling (Queiroz & Melem Junior, 2001). Vol 12, No 10; 2020 addition to the chlorophyll content present in plants can be a useful tool to understand the behavior of plant species under stress conditions (Berilli et al, 2016; Oliveira et al, 2020). Few studies relate water management and the cultivation container with these compounds. Facing the notorious importance of the cocoa crop, the objective of this study was to understand the behavior of the total chlorophyll content, flavonoid index and anthocyanin index in SJ-02 cocoa seedlings under different irrigation depths and sowing containers
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