EFICIÊNCIA NA EMERGÊNCIA E PRODUTIVIDADE DOS DIFERENTES TIPOS DE BATATA-SEMENTE

The potato seed in Brazil is marketed by weight and not on the number of tubers, which is a factor that affects on the cost of production, making essential the knowledge of how characters like weight and emergency efficiency of potato seed can influence the performance of culture. The purpose of this study was to identify the size of the potato seed that has greatest emergency and productivity. Five potato seed types (I, II, III, IV e V) were evaluated, according to the classification of the state of Minas Gerais. The experimental design used in the first trial was completely randomized (greenhouse), and in two field trials were used randomized complete block, all with five replications. The results showed that there is difference in most traits, except to average weight of tubers. It was observed that larger potato seed has more number of eyes, shoots and therefore more rods. It was noted that the larger potato seeds provide increases in productivity (t ha-1), whereas the same spacing between plants. Type I potato seed has the higher fresh weight. There are differences in productivity, given the same spacing, for different types of potato seed, and the Type I has the highest tuber production.A batata-semente no Brasil é comercializada com base no seu peso e não no número de tubérculos, sendo este um fator que afeta sobremaneira o custo de produção, tornando imprescindível o conhecimento de como as características peso e eficiência na emergência da batata-semente influenciam no desempenho agronômico da cultura. O objetivo deste trabalho foi identificar o tamanho da batata-semente que possui maior eficiência na emergência e produtividade. Foram avaliados cinco tipos de classificação da batata-semente (I, II, III, IV e V), de acordo com a classificação do estado de Minas Gerais. O delineamento experimental utilizado no primeiro experimento foi o inteiramente casualizado (casa de vegetação), e nos dois experimentos conduzidos em campo utilizaram-se blocos casualizados, todos com cinco repetições. Os resultados obtidos demonstraram que existe diferença significativa para a maioria dos caracteres avaliados, exceto para peso médio de tubérculos. Observou-se que quanto maior o tamanho do tubérculo da batata-semente, maior o número de olhos, brotos e consequentemente maior número de hastes. Foi possível verificar que quanto maior o tamanho da batata-semente maior será a produtividade (t ha-1), considerando o mesmo espaçamento entre plantas. O Tipo I de batata-semente é o que possui maior massa fresca. Existem diferenças quanto à produtividade, considerando o mesmo espaçamento, para os diferentes tipos de batata-semente, sendo o Tipo I o que apresenta maior produção de tubérculos comerciáveis

Fluorinated ionic liquids for selectively absorbing refrigerant gases

International audienc

Adaptability and stability of maize hybrids in unreplicated multienvironment trials

ABSTRACT In maize breeding programs conducted by private companies, it is common to perform the product advanced trials (PAT) in several cultivation environments in order to better recommend the new hybrids, as well as to provide opportunities for the farmers to evaluate their products. The aim of this study was to describe the adaptability and stability of maize hybrids from unreplicated PATs using a multivariate approach combined with univariate methods. We considered the grain yield data of twelve maize hybrids evaluated in a PATs network conducted by the company DuPont Pioneer in 80 cultivation environments in the states of Minas Gerais and Goias, in second-crop of 2014. The AMMI analysis was employed and additionally we applied the methods based on bisegmented linear regression, Lin and Binns index (1988) and Annicchiarico index (1992). Significant differences were verified among the tested hybrids. The macro-environmental variation and the effect of hybrid by environment (H x E) interaction were expressive. The application of the AMMI method allowed the study of the H x E interaction based on maize PATs. Hybrids 7 and 8 are recommended for higher quality environments, while hybrids 3, 5 and 12 present wide adaptability. The Lin and Binns (1988) and Annicchiarico (1992) indexes highlight the hybrid 8 as the most promising for associating high productivity and lower risk in the tested cultivation environments

Núcleos de Ensino da Unesp: artigos 2008

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq