Desempenho de cultivares de mirtileiros dos grupos rabbiteye e highbush em função da cobertura de solo

Abstract

perFormance oF raBBIteye and hIGhBush BlueBerry cultIvars as aFFected By mulchInG aBstract-The blueberry crop is currently expanding in Brazil, mainly because of its health benefits.Because of its cultivation is recent in the country it still needs studies to assess the best management, such as the most suitable mulching. in this way, the aim of this study was do evaluate the productive and vegetative behavior of rabbiteye (climax, delite and Powderblue) and highbush (Georgiagem, Misty and o'neal) blueberry cultivars as a function of two mulching. The experiment was performed in field conditions, at the company Frutplan Mudas ltda, located in the city of Pelotas,RS, Brazil, from october 2010 to May 2013. it was studied six blueberry cultivars: climax, delite, Powderblue, Georgiagem, Misty e o'neal and two mulching: extruded polypropylene raffia, under the trade name Ground Cover™ and pine needles.The assessed parameters were average stalk diameter, average stalk number, plant height, production per plant, yield, average fruit weight, average fruit diameter and soluble sugars. it was concluded that Ground Cover™ increase the average stalk diameter, stalk number and plant height of all assessed cultivars, as well as the number of berries per tree and production of 'climax', 'delite' e 'Powderblue'. Besides, regardless the mulching, rabbiteye cultivars are more productive than do highbush cultivars. Finally, the yield increase justifies the installation cost of the polypropylene Ground Cover™, in the cultivars Climax, Delite and Powderblue.

Performance of blueberry cultivars under mild winter conditions

“…'Climax' was the most productive and presented good fruit size (14.69mm) and weight (1.61g), similar to those observed by PASA et al (2014), who obtained fruits of 14.13 to 16.54mm and weighting from 1.3 to 1.65g, and better results than reported by ANTUNES et al (2008), of 14.50mm, and 1.32g for the same cultivar in the region of Pelotas-RS. These results confirmed the possibility of cultivating rabbiteye blueberries in mild winter conditions, such as those occuring in Pinhais-PR, latitude 25º South.…”

“…These values are considered insufficient to attend the demand of the highbush cultivars. This unproductive behavior was also observed in the region of Pelotas-RS, with the same cultivars, did not produce with only 368 hours chill (PASA et al, 2014). 'Aliceblue', despite belonging to the rabbiteye group, have not produced either in the first cycle and produced very little in the second.…”

“…4,315kg ha -1 in Pinhais-PR may be estimated, far higher than the estimated 900kg ha -1 productivity when cultivated using raffia and polypropylene soil coverage in Pelotas-RS (PASA et al, 2014). 'Climax' was the most productive and presented good fruit size (14.69mm) and weight (1.61g), similar to those observed by PASA et al (2014), who obtained fruits of 14.13 to 16.54mm and weighting from 1.3 to 1.65g, and better results than reported by ANTUNES et al (2008), of 14.50mm, and 1.32g for the same cultivar in the region of Pelotas-RS.…”

Indole butyric acid application methods in ‘Brite Blue’ blueberry cuttings collected in different seasons

“…Its fruit has been widely consumed around the world and its production has been showing a significant increase worldwide (Wang et al, 2015). The production of blueberry is an activity that requires labor and intense work, but it offers a high economic return in a short period, being an alternative for small growers (Pasa et al, 2014;Affonso et al, 2015).…”