ResumoO cultivo da amora-preta vem crescendo cada vez mais no Brasil, devido as suas qualidades nutricionais. Seu manejo é fundamental para a qualidade do fruto, em especial a poda de produção. O objetivo deste trabalho foi avaliar o efeito da intensidade de poda na produção da amora-preta cv Tupy na região de Ponta Grossa, PR. O delineamento experimental inteiramente aleatorizado consistiu em seis tratamentos com três repetições, sendo os tratamentos: T 1 -2 hastes; T 2 -3 hastes; T 3 -4 hastes; T 4 -5 hastes; T 5 -6 hastes e T 6 -8 hastes, num total de 18 parcelas com 3 plantas cada. Foram avaliados: produção por planta, massa fresca do fruto, sólidos solúveis, coloração e firmeza. O número de hastes deixadas durante a poda afeta a produtividade da amora-preta cv. Tupy, sendo para os parâmetros produção por planta e número de frutos por planta o número de hastes ideal é de 7,8. O número de hastes por planta não interferiu na massa fresca, sólidos solúveis, firmeza e coloração dos frutos. Considerando facilidade de manejo e produtividade recomenda-se trabalhar com 6 hastes por planta. Palavras-chave: Rubus spp, condução de plantas, número de ramos AbstractThe blackberry crop is growing increasingly in Brazil, due to their nutritional qualities. Its management is essential for fruit quality, especially the production pruning. The objective of this study was to evaluate the effect of pruning intensity in the production of blackberry cv Tupy in the region of Ponta Grossa, PR. The entirely randomized experimental design consisted of six treatments with three repetitions, being the treatments: T 1 -2 rods, T 2 -3 rods, T 3 -4 rods, T 4 -5 rods, T 5 -6 rods and T 6 -8 rods, a total of 18 parcels with 3 plants each. Were evaluated: plant production, fresh fruit, soluble solids, firmness and color. The number of stems left during pruning affects the productivity of blackberry cv. Tupy. For the parameters yield per plant and number of fruits per plant the ideal number of stems is 7,8. The number of stems per plant did not influence the fresh weight, soluble solids, firmness and color of the fruit. Considering productivity and ease of management is recommended to work with 6 stems per plant.

Plastic cover and organic fertilization for grapevine can bring synergistic benefits in yields and fruit quality. The objective was to characterize and measure the effects of fertilization with cattle slurry in systems without and with plastic cover on plant nutrition, yield and quality of ‘Niagara Rosada’ fruits. Two experiments were carried out and evaluated in contiguous areas, without and with plastic cover, each one using a randomized complete block design with 4 treatments represented by cattle slurry rates of 0, 20, 40 and 60 m3 ha-1, with four replicates. The nutritional status of grapevines was not affected by cattle slurry application without plastic cover in plants growing on fertile sandy soil. Plastic cover provides better nutrition ofprimary macronutrients and higher yield and fruit quality, even without the use of manure. Without plastic cover, cattle slurry rates above 20 m3 ha-1 and below 60 m3 ha-1 were able to balance phosphate and potassium nutrition in these systems, increasing fruit yield by 31% up to 32 m3 ha-1, respectively. However, this increment represented 64% of the average yield of fruits obtained with plastic cover without organic fertilization. Thus, the use of plastic cover on grapevine represents a conservationist soil fertility management, adding sustainability and increasing fruit yield and quality.