Spatial distribution of physiological quality of Arábica coffee seeds to cultivate Catuai

Abstract

Brazil stands as the largest coffee producer in the world. However one of the factors capable of undermining the potential of this species is the poor quality of seeds. One tool that is being proposed for use in agriculture is the Geostatistics analysis to verify the existence and quantify the degree of spatial dependence of variables. The seeds were collected in a field with five years of age in an area of 0.8 ha, 50 sampling points. In the laboratory we used a completely randomized design (CRD) with four replicates of 25 seeds per point materialized with the aid of a total station. After removal of the scrolls, the seeds were treated with Captan (Orth Cide) to 0.1% for five minutes and subjected to the following determinations: moisture, germination first count of germination, root length and shoot length. Then the seeds were placed to develop in an incubator at temperature 20-30 °C for 60 days. In the results there was spatial dependence of the quality variables of physiological Catuaí. The lowest range for the variable length of shoot (CPA) and greater range for the variable fresh weight (MFPA).Key words: precision coffee, germination, geostatistical, vigor. RESUMEN

SPATIAL DISTRIBUTION OF PHYSIOLOGICAL QUALITY OF Joannesia princeps Vell. SEEDS1

“…The analysis of the spatial distribution of the physiological quality of J. princeps may be used as dependence for distances greater than the lowest sampling, suggesting that the samples may be independent. When studying the physiological quality of Coffea arabica L. seeds, Lopes et al (2014) also used spherical and Gaussian models, which confirm their importance for the spatial distribution of plant parameters. Ferraz et al (2017) also adopted the spherical model to describe the spatial distribution of some specific attributes, such as C. arabica.…”

“…The construction of E, ESI, RL, SD, APL, APFM, RSDM and APDM thematic maps ( Figure 2) using ordinary kriging can contribute to two points: an understanding of the spatial distribution pattern of J. princeps seeds physiological quality, and the distinction between regions of high vigor and low vigor, when considering seed collections. The last point is mentioned by Lopes et al (2014) when analyzing C. arabica seeds. Seed vigor can be understood as the energy that the seed has in order to perform the germination process tasks (Carvalho and Nakagawa, 2012).…”

Cold coffee seeds storage with different water content

“…The seeds with the highest water content performed better than those were dried at lower water levels, and the cooled environment (15 °C) was also superior when compared to the environment at ambient conditions. Lopes et al (2014), working with arabica coffee seeds storage, observed that seeds with a higher water content preserved their viability for a longer period during storage than those with a lower water content. These data corroborate with that was observed in this study.…”