Desempenho agronômico de genótipos de pinhão-manso

• Autor(a) principal: Pereira, Joseanny Cardoso da Silva
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/00130000043ct
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/5372
• topic: Jatropha curcas L.; Crescimento; Tratos culturais; Produção; Jatropha curcas L.; Growth; Cultivation; Production; CIENCIAS AGRARIAS::AGRONOMIA

The objective of this research was to evaluate the silvicultural behavior six Jatropha genotypes and determine the effect of canopy formation pruning uniformity and grain yield of Jatropha genotypes. In the first experiment, we used the experimental design in blocks at random, with two replications and five plants per plot. Treatments consisted of three genotypes (CNPAE-107, CNPAE-133, CNPAE-169) of jatropha evaluated over a period of five years. In the second experiment, the experimental design was a randomized block design with two replications and six plants per plot. Treatments consisted of two types of pruning training + control (free growth) and three genotypes (CNPAE-101, CNPAE-170, CNPAE-259) of jatropha evaluated over a period of three years. For the first experiment, there was difference in the development of the three genotypes in relation to plant height, number of primary branches, canopy projection on the line and leading, canopy volume and grain production. All features evaluated were positively correlated with production. The production of jatropha has been growing over the years, however, from the third year, there was a reduction, should be assessed this species for a longer period of time to obtain more information on productive performance. The most productive genotypes were CNPAE-107 and CNPAE-133 and the highest yields were achieved after 44 months (3.7 years) (2076.5 kg ha-1 and 2123.8 kg ha-1 respectively). On the second experiment, the types tested pruning only affected the number of branches. There was no significance for genotype x pruning. Pruning training held at two months after planting showed a similar effect to the control. The genotypes tested showed significant differences for all traits, and the CNPAE-101 and CNPAE-170 genotypes achieved the highest yields. Grain yield was negatively correlated with all variables. Pruning only affected the number of branches, which is negatively correlated with the yield.