Performance of advanced potato genotypes in organic and conventional production systems

Carlos Francisco Ragassi,Giovani Olegário da Silva,Gabriel Emiliano Pereira,Agnaldo DF de Carvalho,Arione da S Pereira

doi:10.1590/s0102-053620200108

Carlos Francisco Ragassi, Giovani Olegário da Silva + Show 3 more

Open Access

https://doi.org/10.1590/s0102-053620200108

Copy DOI

Abstract

ABSTRACT Potato is responsive to intensive agricultural input use; however, it can be produced in less intensive production systems (such as the organic system) by using appropriate production techniques and genotypes adapted to this system. This study aimed to evaluate the performance of advanced potato genotypes for tuber yield under conventional and organic production systems, in order to select potential genotypes to become new cultivars adapted to these systems. Fifteen advanced potato clones and two controls were evaluated under organic and conventional production systems, in 2016 and 2017, in Brasília-DF, Brazil. The experimental design was randomized blocks with three replicates and plots composed of two rows with 10 plants each, spaced 0.35 m between plants and 0.80 m between rows. Total (mass) and marketable (mass and number of tubers) productivities were evaluated. Variance analysis showed significant differences among genotypes for all traits. Despite the lower average tuber yield in the organic system, selecting genotypes with high potential productivity was possible in this system, such as F158-08-01 and F158-08-02, showing high marketable tuber yield, with values equivalent to the conventional system. Clones F102-08-04, F13-09-07, F-18-09-03, F-183-08-01, F-21-09-07, F31-08-05, F63-10-07 and F97-07-03 also outperformed the control cultivars in organic system. For conventional system, F158-08-01, F158-08-02 and F183-08-01 were superior, and F18-09-03, F21-09-07, F63-10-07, F97-07-03, PCDINV10 and PCDSE090 showed performance similar or superior to the most productive control (cultivar Asterix). Genotypes F158-08-01 and F158-08-02 were superior in both conventional and organic systems, with potential to become new cultivars recommended for both production systems.

Highlights

Desempenho de genótipos de batata em sistema orgânico e convencional de produção Embora seja responsiva ao uso intensivo de insumos agrícolas, a batata pode ser produzida em sistemas de produção menos intensivos, como o sistema orgânico, por meio do uso de técnicas de produção adequadas e genótipos adaptados
Os clones F158-08-01 e F158-08-02, portanto, foram superiores em ambos os sistemas e possuem potencial para se tornarem novas cultivares com recomendação para esses dois sistemas de produção
Nutrients are less concentrated in an organic system when compared with a conventional production system, this latter one relying on high doses of chemical fertilizers applied to the planting line

Summary

Introduction

Desempenho de genótipos de batata em sistema orgânico e convencional de produção Embora seja responsiva ao uso intensivo de insumos agrícolas, a batata pode ser produzida em sistemas de produção menos intensivos, como o sistema orgânico, por meio do uso de técnicas de produção adequadas e genótipos adaptados. Objetivou-se avaliar o desempenho de clones avançados de batata para caracteres componentes do rendimento de tubérculos em sistemas orgânico e convencional de produção, para a definição dos clones com maior potencial para se tornarem novas cultivares, adaptadas a esses sistemas. Foram avaliados 15 clones avançados de batata e duas cultivares testemunhas em sistemas orgânico e convencional de cultivo, nos anos 2016 e 2017 em Brasília-DF. Os clones F158-08-01, F158-08-02 e F183-08-01 foram superiores e os clones F18-09-03, F21-09-07, F63-10-07, F97-07-03, PCDINV10 e PCDSE090 apresentaram desempenho semelhante ou superior à testemunha mais produtiva (cultivar Asterix). The productivity increase is possible because potato crop shows a very remarkable response to the crop management techniques, such as, the application of large quantities of fertilizers (Silva et al, 2018a), or an efficient chemical control of pests and diseases. Using appropriate management technique, such as, application of fertilizers and products which are allowed in organic system, provides a satisfactory productivity, and an acceptable product quality (Nazareno, 2009)

Objectives

Methods

Results