Produtividade e composição mineral do feijão em resposta às adubações com molibdênio e níquel

Abstract

Nickel and molybdenum are essential micronutrients that have the ability to affect the growth and development of common bean. In this sense, the objective of this research was to assess the productivity, growth and mineral composition of 'Ouro Vermelho' bean in response to fertilization with molybdenum (Mo) and nickel (Ni). The field work was conducted at "Instituto Federal de Educação Ciência e Tecnologia do Espírito Santo (IFES/Alegre-ES)" in argisoil gray dystrophic haplic acrisol. The experiment was performed in a 5 x 2 factorial with 5 doses of Ni (0; 15; 30; 45 and 60 g ha-1) and Mo (0 and 80 g ha-1) in a randomized block design, repeated four times. The foliar application of Ni and Mo was done 25 days after sowing by hand sprayer. The characteristics evaluated were: Final stand, height, yield, number of pods per plant, number of seeds per pod, weight of 100 seeds and the contents of N, P, K, Fe, Mo, and Ni. It could be verified that the molybdenum fertilization increased the content of N in the leaf, decreased the content of Fe in the seed, respectiand in case of high dose of Ni, the content of Ni in the seeds was decreased. The doses of Ni increased the content of N in the leaf, and when molybdenum was added, the content of Fe in the seeds increased. There was an increase in the number of beans per pod after the application of Ni and in the shoot dry weight with molybdenum fertilization. The fertilization with 80 g ha-1 of Mo and 60 g ha-1 with Ni increased in 12,71% and 29,69%, respectively, the productivity of bean.