<b>Sources and doses of zinc in common bean cultivated in different sowing seasons</b> - DOI: 10.4025/actasciagron.v30i2.1739

Abstract

This work was carried out with the objective of evaluating dry bean yield in different seasons, submitted to foliar application of different sources and doses of zinc. A randomized block design with four replications was used in a 3 x 2 x 5 factorial arrangement. The treatments were formed by the combination of three growing seasons (“fall/winter”, “spring/summer” and “fall/summer” seasons), two zinc sources (zinc sulfate and zinc chloride) and five zinc doses (0, 100, 200, 400 and 800 g ha^-1), divided into leaf sprayings at 25 and 35 days after emergence (DAE). For the winter crop, a greater increase was observed in grain yield, its main components (number of pods per plant and number of grains per plant) and leaf-zinc content, as compared to the other two seasons. There was no interaction between growing seasons, doses and sources of zinc. In soils with zinc content of 2.1 mg dm^-3, the addition of this nutrient by foliar application did not result in increase of bean yield