Abstract
The objective of this work was to analyze the association between agro-morphological traits of the common bean cultivar “BRS Esplendor” under organic fertilization management. The experiment was implemented in the field, in a randomized block design, with three replications, in a split plot scheme, with two types of organic compounds (grass enriched with cattle manure and bean straw enriched with cattle manure) applied in six doses (0.0, 33.32, 66.65, 100.00, 133.32 and 166.65%). The control treatment comprised the recommended mineral fertilization. The characteristics include total number of pods, plant height and pod lengths are determinant to directly increase grain yield. The indirect determinant includes total weight of pods, total number of grains, plant height, root length and length of pods that had a positive effect with high magnitude on the characteristic total number of pods. Key words: Phaseolus vulgaris, correlations, track analysis.
Highlights
Brazil is the world's leading producer of common beans (Phaseolus vulgaris L.), with production of 2.7 million tons and average productivity around 1,964 kg ha-1 in the 2019/2020 crop, and its cultivation was carried out in almost all regions of the country (CONAB, 2020)
The magnitudes of phenotypic correlation between the characters ranged from 0.02 for Leaf area index (LAI) characteristics correlated with total number of pods (TNP), total weight of pods (TWP) and total number of grains (TNG) and 0.99 for the TNG characteristic correlated with TNP
With the exception for W100, all correlations of TWP, TNG, plant height (PH), root length (RL), stem diameter (SD) and pod length (PL) characteristics had positive values with high magnitude. The correlation of these characteristics on TNP varied with magnitudes of 0.96, 0.99, 0.92, 0.85, 0.72 and 0.79, respectively
Summary
Brazil is the world's leading producer of common beans (Phaseolus vulgaris L.), with production of 2.7 million tons and average productivity around 1,964 kg ha-1 in the 2019/2020 crop, and its cultivation was carried out in almost all regions of the country (CONAB, 2020). One of the options to leverage the stability of its commercialization is the aggregation of value to the grain, which can be desired with the use of the organic production system. The demand for this organically produced food has increased, even with values that are 30-40% higher than conventionally grown beans (Pereira et al, 2015). Darolt (2000) cited by Pereira et al (2015) found that the barriers to organic cultivation is directly related to the lack of credit programs to finance such activity, in addition to the difficulties in marketing the products and the lack of technical information. There is a need for examination that shows increased productivity and the expression of phenotypic characteristics. The variability in the expression of the results is essential for the success of the selection of phytotechnical characteristics and the breeder, with a focus on the main characteristic of economic importance (Cabral et al, 2010; Silva et al, 2008; Vieira et al, 2008 cited by Cabral et al, 2011)
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