The Bell peppers is a tropical culture and it is in the 10 most consumed vegetables of the world. The mineral nutrition is essential to the productivity and better quality of the gather fruits. In bell pepper cultivation, high portions of nitrogen are essential to a good performance of fruits. The foliar fertilizing is a complement to the ground fertilizing. The amino acids are a good source of nitrogen, once these are quickly incorporated to the plants metabolism. Therefore, this work aimed to estimate the sources and portions of N to the foliar application in Bell pepper cultivar. The Randomized blocks design was utilized in a factorial scheme 2 × 4, with four repetitions. The first factor corresponded in two sources of N: urea and amino acids. The second factor corresponded to the number of repetitions by foliar: 0, 1, 3, 5 and 7 applications during the culture cycle. The first foliar application occurred ten days after the transplant, and the subsequent in breaks of fifteen days after the first application. In the test there was not application. The baselines evaluated: Cross length of fruits, fruits diameters, number of total fruits and productivity in kg ha-1. The results were submitted to variation and regression analysis. The application of amino acids by foliar in plants of Bell pepper, increased the diameter and the length of fruits. High sources of urea also provided morphological changes in fruits however lower amino acids utilization.

Com o objetivo de avaliar a adubação orgânica e mineral na cultura do milho, foram estudadas cinco doses de cama de aviário (0; 2,5; 5; 10 e 20 t ha -1 ), e cinco doses de adubo mineral NPK (100; 200; 300; 400 e 500 kg ha -1 ), na formulação 05-25-15, no delineamento em blocos casualizados, em esquema fatorial 5x5, com três repetições. Verificaram-se interações significativas entre adubação com cama de aviário e a adubação mineral para todas as variáveis estudadas. Conclui-se, de maneira geral, que o melhor resultado foi com 15 toneladas por hectare de cama de aviário, associada com 300 kg ha -1 de adubo mineral NPK. Palavras-chave: Zea mays L.; sustentabilidade; cama de aviário.This study aimed to evaluate the organic and mineral fertilization in maize. We tested five doses of manure (0, 2.5, 5, 10 and 20 t ha -1 ) and five doses of mineral fertilizer NPK (100, 200, 300, 400 and 500 kg ha -1 ) in the formulation 05-25-15, in a randomized block design using a 5x5 factorial arrangement with three replications. There were significant interactions between fertilization with poultry manure and mineral fertilizer for all variables studied. We conclude, in general, the best result was with 15 tons per hectare of manure associated with 300 kg ha -1 of mineral fertilizer NPK.

The aim of the study was to evaluate the agronomic and economic characteristics of broccoli following the application of boron (B) doses in the transplanting furrow with or without the application of poultry litter. The research was carried out in a Dystrophic RedYellow Latosol (Oxisol) from April to July 2015. The experimental design was randomized blocks in a 2 x 5 factorial arrangement, where the first factor was fertilization without or with poultry litter (0 and 10 t ha -1 ) and the second factor was the B dose (0, 2, 4, 6 and 8 kg ha -1 ), with three replicates. The broccoli cultivar used was the Avenger hybrid. The analyzed variables were B content in the inflorescence, leaves, and stem; total B content of the shoot; fresh and dry mass of the inflorescence, leaves and stem; inflorescence diameter; total and commercial yields; incidence of hollow stem; and economic aspects of fertilization. The poultry litter, on the average of all doses, increased the foliar B levels and the fresh mass of the broccoli inflorescences and leaves, providing a greater yield and gross revenue. The B levels in the inflorescences and leaves increased with the B dose regardless of fertilization with poultry litter but only increased in the absence of the organic fertilizer in the stems. The profitability index increased with the B dose up to 8 kg ha -1 in both the presence and absence of fertilization with poultry litter, but the more appropriate to farmers was the B dose of 8 kg ha -1 and 10 t ha -1 of poultry litter.