Desenvolvimento de amendoim cultivado em dois sistemas de produção e diferentes manejos de plantas daninhas.

Abstract

The cultivated species Arachis hypogaea L. is originally from South America, being the third most cultivated legume in the world, its importance is related by the fact that its seeds besides having a pleasant flavor are rich in oil and proteins. This legume is grown in several states in Brazil, mainly in the Southeast, South and Northeast. The objective of this work was to evaluate the effect of cultivation systems and weeding periods on the development of the BR1 peanut variety. The experiment was installed using a factorial (2 x 4), with a randomized block design, consisting of 8 (eight) treatments and 3 (three) repetitions, totaling 24 experimental units. The units consisted of 3 (three) 4m lines, with 0.5m spacing between lines and 0.10m between plants. The data were submitted to analysis of variance by the F test and the means compared by the Tukey test at 5% probability. It was observed by the F test, a significant effect only for productivity and weight of 1000 (thousand) seeds in cultivation system and weeding. The best values obtained in most of the production components, mainly in the weight of 1000 seeds and in productivity, justify the recommendation of the planting system 2 without the formation of leirões. The greatest research found in the treatment in which the crop remained free of weeds until 60 days after sowing (3758 kg-ha1), made it possible for peanut growers to adopt this critical period under the conditions of the municipality of Areia - PB.