Desenvolvimento de mudas de palmeira-rÃfia cultivada sob diferentes sombreamentos e nutriÃÃo foliar / Growth of Seedlings of Lady Palm Cultivated Under Different Shades and Foliar Fertilizer.

AUTOR(ES)

AntÃnio Josà Arantes Meirelles

DATA DE PUBLICAÇÃO

2006

RESUMO

The palm Rhapis excelsa is an ornamental plant with commercial value. It demands, in its initial stage, the protected cultivation under special structures and being adapted in different species. Proper lighting balanced with fertilizers/nutrients are very important for the development of plants in high tech agriculture. Not only the amount of lighting but also the quality of lighting reaching the plants shall be considered in order to increase production. In the experiment described in this paper, it was used a technology that uses colored screens providing shadow and filtering specific light wavelength. It happens the lack of information regarding mineral nutrition for the growth of this specie. This experimental work was carried out at the Federal university of Lavras, Lavras, MG., with the main goal of evaluating growth parameters, anatomy differences and nutrient contents in seedlings of palm Rhapis excelsa, cultivated under different conditions of screening and different foliar fertilizers. The plants used in this experiment were cultivated in recipients having substrate, organic matter and sand (1:1:1), with the addition of 10 g of fertilizer by liter of substrate. These plants were four years old approximately. Series of measurements about the increase of height and number of leaves were taken at 30, 75, 105, 135 and 195 days since the beginning of the experiment. It was also observed the number and height of seedlings, width from leaflets, nutrient contents, anatomy characteristics, as well as the final plant height at 195 days. The different types of screening did not affect significantly the final height of the plants not even in the valuations of height increase at 135 and 195 days of age, nevertheless the screening affected significantly the abaxial epidermis, number of stomata and their polar and equatorial diameter. In conclusion, the growth of palm Rhapis was not affected by screening.

ASSUNTO(S)

shade light fertilizer palmeira-rÃfia luz nutriÃÃo agronomia crescimento lady palm sombreamento growth

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