No abstract

No abstract

The present study aimed to evaluate the initial growth of Passiflora edulis plants under water deficit and inundation. The work was carried out in a greenhouse covered with transparent plastic in pots with a capacity of five liters and filled with 5 kg of substrate composed of oxisol, sand and cattle manure in the proportion of 3:1:1, respectively. The experimental design used was completely randomized, with seven treatments and five repetitions; 30 days after emergence, the plants were irrigated with water equivalent to 25%, 50%, 75%, 100%, 125%, 150% and 175% of the pot capacity and the analyzes were performed on the 52nd day. The P. edulis plants under limitation and excess water showed high stomatal sensitivity to reduce the water. In addition, under water deficit, the plants showed bigger root growth to maximize water absorption from the soil, but in both stresses the plants demonstrated reduced vegetative growth, that implies retarded establishment, thus, demonstrating an average susceptibility to water deficit and inundation.

O presente estudo teve como objetivo avaliar a produtividade de plantas de pinhão manso cultivadas em diferentes espaçamentos. O trabalho foi conduzido no campo experimental da Universidade Estadual de Goiás em Latossolo Vermelho-Amarelo. Utilizou-se o delineamento experimental em blocos casualizados com três tratamentos (plantas cultivadas nos espaçamentos 3x1, 3x2 e 3x3 m) e seis repetições. A competição entre plantas de pinhão manso pouco afetou o crescimento vegetativo das plantas, no entanto, com o desenvolvimento dos frutos, drenos que mais demandam assimilados na planta, a competição por recursos abióticos contribuiu para redução da produtividade. Palavras-chave: Densidade de plantas; Jatropha curcas; rendimento de sementes.The present study aimed to evaluate the productivity of Jatropha curcas plants grown at different spacings. The work was conducted in the experimental field of the University of Goiás in Oxisol. We used a randomized complete block design with three treatments (plants grown in spacing 3x1, 3x2 and 3x3 m) and six replications. Competition between plants of Jatropha curcas had little effect on the vegetative growth, however, with the development of the fruit, drains demand more assimilated in the plant, the competition for abiotic resources in plants densest contributed to reduced productivity.

This study has shown the main issues related to the process design of Brazil nuts, supporting the necessity for research on new strategies to improve the quality of nuts. Also, the habit of eating Brazil nuts stored throughout the year may represent a risk to farmers.