The use of plants for permanent or partial coverage of soil in the vineyard inter-rows is a cultural practice used in various wine-growing regions since it is believed that the decomposition of cover crops’ straw on the soil surface can increase the availability of nutrients. Therefore, this study aimed to evaluate the nutrient cycling of soil with cover rops in consortium with grapevine (Vitis labrusca L. cv. Isabel) cultivated in tropical regions, its nutritional status, and the soil fertility. The experiment was carried out in a vineyard of Isabel cultivar, and three species of ground cover crops were evaluated (Canavalia ensiformis L. DC, Dolichos lablab L., and weeds). Canavalia ensiformis L. DC was more effcient in nutrient accumulation in the canopy than the others. However, the release of nutrients was not statistically different among the cover plants used, being more influenced by the time of grapevine pruning. These coverages did not change the soil chemical properties in the three crop cycles of the two grapevines evaluated and did not affect their nutritional status at the blooming stage of the two harvest seasons evaluated.

In the State of Goiás, studies related to the vine's responses to the region's edaphoclimaticconditions are scarce. Therefore, the objective of this work was to evaluate the growth of three vine rootstock cultivars, IAC 572 'Jales', IAC313 'Tropical' and IAC766 'Campinas', in the region of Goiânia, GO, after drastic pruning for uniformity. To evaluate the growth of rootstocks, the experiment was carried out in random blocks, in a double factorial scheme (3x7), with five replications, each repetition formed by a plant. The first factor consisted of three rootstocks: IAC313 ‘Tropical’, IAC572 ‘Jales’ and IAC766 ‘Campinas’. The plants were evaluated after 45 days after a drastic uniformization pruning, totaling seven evaluations (45, 60, 75, 90, 105, 120, 135 days after pruning), this being the second factor. The diameter of the main branch at the height of grafting (80 cm) and length of the main branch were evaluated. With the data on the diameter and length of the main branch, the absolute growth rate in diameter and length was calculated.The IAC572 'Jales' rootstock cultivar has greater vigor for branch growth, being 69% and 47.3% longer in length, and 49.8% and 18.8% longer in diameter than the IACrootstock. IAC 313 'Tropical' 'and' IAC766 'Campinas', respectively. The IAC766 ‘Campinas’ rootstock cultivar, although it has low vigor in branch growth, presents satisfactory development.

SISTEMA RADICULAR DO PORTA-ENXERTO IAC 572 ‘JALES’ SOB NIÁGARA ROSADA NAS CONDIÇÕES DO CERRADO GOIANO  LUIZ FERNANDES CARDOSO CAMPOS1; JOSÉ ALVES JR.2; CAMILA MEIRA DE ABREU CAMPOS3; DERBLAI CASAROLI2; ADÃO WAGNER PEGO EVANGELISTA2 E ALEXSANDER SELEGUINI4 1 Programa de pós-graduação em agronomia, Universidade Federal de Goiás, Goiânia-GO, e-mail: luizfernandescampos@hotmail.com.2 Setor de engenharia de Biossistemas, Escola de Agronomia, Universidade Federal de Goiás, Goiânia-GO, e-mail: jose.junior@pq.cnpq.br; derblai@pq.cnpq.br; awpego@pq.cnpq.br;3 Engenheira agrônoma, Universidade Estadual de Goiás, Palmeiras de Goiás, e-mail: camilaabreuagro@hotmail.com.4 Setor de Horticultura, Universidade Federal do Triangulo Mineiro, Campus Universitário de Iturama, Iturama – MG, e-mail: aseleguini@gmail.com.  1 RESUMO O conhecimento da distribuição das raízes no solo é fundamental para a produção agrícola, pois permite realizar o manejo mais adequado em cada etapa do desenvolvimento. O objetivo deste trabalho foi avaliar a distribuição do sistema radicular de plantas de videira, do porta-enxerto IAC572‘Jales’ sob a cultivar Niágara rosada no cerrado goiano em duas idades de plantas. As plantas avaliadas localizavam-se em áreas de Latossolo Vermelho distrófico, arranjadas no espaçamento 2,5mx2,5m. Avaliaram-se espessura e densidade das raízes a partir de amostras de solo coletadas à cinco distâncias do caule (0,25; 0,50; 0,75; 1,0; e 1,25m) e cinco profundidades (0,0-0,20m; 0,20-0,40m; 0,40-0,60m; 0,60‑0,80m; e 0,80‑1,0m). Utilizou-se o delineamento inteiramente casualizado, em esquema fatorial triplo 2x5x5 (idades x distâncias do caule x profundidades), com três repetições. A idade das plantas não influenciou na densidade. As raízes com diâmetro menor que 2mm concentram-se na camada de 0,0-0,20m de profundidade. Raízes grossas com diâmetro acima de 2mm concentram-se até 0,50m de distância do tronco e na profundidade de 0,20‑0,40m. A profundidade efetiva do sistema radicular foi encontrada a 0,60m, e a distância efetiva até 1,00m, sendo esta zona onde concentram-se 80% das raízes, já a partir do segundo ano de idade do pomar. Palavras-chave: Vitis labrusca, densidade de raízes, comprimento de raiz, profundidade efetiva  CAMPOS, L. F. C.; ALVES JR., J.; CAMPOS, C. M. A.; CASAROLI, D.; EVANGELISTA, A. W. P.; SELEGUINI, A.ROOT SYSTEM OF IAC 572 'JALES' ROOTSTOCK UNDER NIAGARA ROSADA VINE PLANT IN GOIÁS STATE SAVANNA CONDITIONS  2 ABSTRACT The knowledge of roots distribution in soil is fundamental for agricultural production, since it allows performing the most appropriate management in each stage of development. The objective of this work was to evaluate the roots distribution of rootstock of vine plants IAC572'Jales' under Niagara rosada cultivar in cerrado of Goiás at two plant ages. The evaluated plants were located in areas of dystrophic Red Latosol, arranged in spacing 2.5mx2.5m. Root thickness and density were determined from soil samples collected at five distances of the stem (0.25, 0.50, 0.75, 1.0, and 1.25m) and five depths (0.0-0.20m, 0.20-0.40m, 0.40-0.60m, 0.60-0.80m, and 0.80-1.0m). A completely randomized design was used, in a triple factorial scheme 2x5x5 (ages x distances of the stem x depths), with three replications. The age of the plants did not influence the roots density. The finer roots with a diameter of less than 2mm are concentrated in 0.0-0.20m layer. Thick roots with a diameter above 2mm are concentrated up to 0.50m away from the trunk and at a depth of 0.20-0.40m. The effective depth and distance of the root system (80% of roots concentrated) were found at 0.60m and up to 1.00m, respectively, already from the second year old. Keywords: Vitis labrusca, density of roots, root length, effective depth

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The seedling production is a stage of great importance for several crops. The seeds of the coffee tree present germination difficulties due to the physical barrier imposed by the parchment. The objective of this study was to evaluate the effect of parchment presence and pre-sowing treatment with vitamins on the emergence of coffee seedlings. The experimental design was completely randomized, in a 2x4 factorial design (parchment presence x types of vitamins), in four replicates with 15 seeds per plot. Vitamins concentration was 100 mg l-1 of thiamine, 100 mg l-1 niacin, 50 mg l-1 thiamine + 50 mg l-1 niacin and a control treatment. The evaluations were performed weekly, with the emerged seedlings being counted until the 76 th day after sowing. The emergence percentage was obtained after the 146 th day after sowing, counting the number of normal seedlings obtained. The parchment removal increases the speed and the emergence percentage of the coffee seedlings. The treatment with vitamin did not influenced the emergence characteristics of the coffee tree.