resuMo-O uso de microjardins clonais em sistemas de cultivo sem solo para fornecimento de material propagativo na cultura do mirtileiro (Vaccinium spp.) pode trazer grandes avanços na produção de mudas dessa cultura. O objetivo desta pesquisa foi avaliar a produção de microestacas e a sobrevivência de plantas matrizes de mirtileiro micropropagadas das cultivares Woodard e Aliceblue, em dois sistemas de cultivo. Os sistemas de cultivo utilizados foram o semi-hidropônico (floreiras com substrato de areia e fornecimento diário de solução nutritiva) e o com substrato organomineral (sacos plásticos com substrato comercial e fornecimento de solução nutritiva a cada 15 dias). Após o período de 90 dias do plantio das plantas matrizes, foram iniciadas as coletas de microestacas, as quais foram realizadas a cada 60 dias, com exceção do período de inverno, em que as coletas foram realizadas a cada 90 dias, totalizando ao final do experimento onze coletas. O experimento foi constituído como um fatorial 2 x 2 x 11 (sistemas x cultivares x coletas), em delineamento inteiramente casualizado, com três repetições de 12 plantas cada. Foram avaliadas a produção total de microestacas ao final das onze coletas, o número de microestacas produzidas por planta matriz a cada coleta, a sobrevivência das plantas matrizes ao final das onze coletas e a sobrevivência das plantas matrizes a cada coleta. Os resultados indicaram que o sistema semi-hidropônico foi superior ao substrato organomineral para a produção de microestacas de ambas as cultivares. A maior produtividade total de microestacas ocorreu no sistema semi-hidropônico combinado com a cultivar Aliceblue, com produção total média de 237,67 microestacas. Porém, nesta condição, houve menor sobrevivência das plantas matrizes. A produção de microestacas apresentou alternância ao longo das coletas. A sobrevivência das plantas matrizes diminuiu após sucessivas coletas. Após as coletas de verão, ocorreu maior mortalidade de plantas matrizes. termos para indexação: microestacas, planta matriz, Vaccinium spp. BlueBerrY clonal MicroGarden in soilless sYsteMsaBstract -the use of clonal microgardens in soilless cultivation systems in order to produce propagative material of blueberry crop (Vacccinium spp) can bring major advances in the production of the transplants. the objective of this research was to evaluate microcutting production and survival of micropropagated blueberry stock plants of Woodard and Aliceblue cultivars in two crop systems. Semi-hydroponic system (plastic flowers pots containing sand and irrigated daily with nutrient solution) and organicmineral substrate system (polyethylene sacs containing commercial substrate and irrigated with nutrient solution every 15 days) were used. Microcuttings collects began 90 days after mother microplants setting in the systems. the collects were performed every 60 days, exception in winter, when samples were collected every 90 days, corresponding to eleven collects until to the end of the experiment. the experiment was set up as a factorial 2...
The expansion of Brazilian cherry tree cultivation is affected by propagation difficulties and slow seedling production development. The cuttings and minicuttings technique is an alternative that offers several advantages, and it proved to be highly promising for many fruit tree species. Minicuttings taken from a clonal garden were rooted in 22 x 14 x 10 cm plastic boxes containing vermiculite, at IAB concentration of 2.000 mg.L-1. The experimental design was totally randomized with eight treatments (cultivation weeks), with four replications, with five minicuttings each. They were evaluated eight times (once a week), for a period of two months. The following variables were analyzed: number of swollen minicuttings, rooted minicuttings and minicuttings with roots longer than 1 cm. From the third week onwards, rooting was positive, with 70% of rooted minicuttings and 5% with swellings. In the fourth evaluation, 55% already showed roots longer than one centimeter, with a mean of 2.66 cm, five with roots emergence and three with swellings. In general, in seven weeks’ time the minicuttings showed efficient root development and were ready to be transplanted to plastic bags to develop quality seedlings.
The The objective of this work was to evaluate ‘Arbequina’ olive tree seedlings growth obtained from mini-cuttings under soilless growth systems and different periods. The experimental design was entirely randomized according to the 3 x 2 x 5 factorial design (three systems, two periods and five months of cultivation), with four replications of 12 plants. Under the hydroponic system, the experiment used sand as substrate and irrigated seedlings daily with a nutritive solution. For the Nutrient Film Technique (NFT), plants were irrigated using intermittent flow irrigation. Under the conventional system, plants were grown in plastic bags filled with the substrate Carolina®, with 100 mL of nutritive solution every 15 days. The following variables were analyzed: number of shoots, number of secondary shoots and secondary shoots length during the cultivation period. After 150 days of cultivation, the following variables were analyzed: stem diameter, aerial part fresh and dry matter and root fresh and dry matter and root length for the conventional and semi-hydroponic systems. The use of the semi-hydroponic system promotes greater plant growth. The period with the highest temperature (spring/summer) promotes greater plant growth.
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