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首页> 外文期刊>Revista Brasileira de Fruticultura >Produ??o e características físico-químicas dos cachos da videira 'BRS Clara' sob cobertura plástica e sombrite em safra fora de época
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Produ??o e características físico-químicas dos cachos da videira 'BRS Clara' sob cobertura plástica e sombrite em safra fora de época

机译：淡季塑料覆盖和黑云母下'BRS Clara'藤蔓簇的生产和理化特性

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Due to favorable climatic conditions for the occurrence of fungal diseases in table grapes, technologies that provides the reduction of production costs have been persuaded, and an alternative for it is the cultivation of grapes under plastic cover. The aim of this study was to evaluate the production and the bunches physico-chemical characteristics of the 'BRS Clara' grapevines grafted on IAC-766 'Campinas' rootstock, in protected cultivation during out of season crop, in order to reduce the application of fungicides to control downy mildew. The experiments were performed in commercial vineyards located at Uraí and Marialva, PR. The vines were trained in an over-head trellis system, in a spacing of 4.0 x 4.0 m in Uraí, and 2.0 x 5.0 m in Marialva. The randomized design was used as a statistical model, consisted of two protected cultivation (under plastic cover and under plastic screen) with seven replications. In the experiment conducted in Uraí, it was not verified difference between the protected cultivation systems regarding the grapevine production characteristics and chemical characteristics of the berries, such as soluble solids content, maturation index and pH. It was verified the occurrence of downy mildew just on leaves, which the incidence and severity was lower in vines under plastic cover (0.5 and 0.02% respectively). In Marialva, the plastic cover had no influence on grape production characteristics as well. However, the soluble solids content of berries under plastic cover was higher in relation to those under plastic screen (19.6 and 17.2oBrix, respectively). It was not detected the occurrence of downy mildew in any of the systems of protected cultivation in this location. It was concluded that the use of plastic cover allows the reduction of the number of fungicide applications to control downy mildew, with no change on production characeristics of 'BRS Clara' grape.
机译：由于食用葡萄发生真菌疾病的有利气候条件，已经说服了可以降低生产成本的技术，并且替代方法是在塑料覆盖下种植葡萄。这项研究的目的是评估在过时作物的保护性种植过程中，在IAC-766'Campinas'砧木上嫁接的'BRS Clara'葡萄的产量和串理化特性，以减少农作物的应用。杀菌剂可控制霜霉病。实验是在位于乌拉伊和马里亚尔瓦的商业葡萄园中进行的。在高架格子系统中对葡萄藤进行了培训，在乌拉伊的间距为4.0 x 4.0 m，在Marialva的间距为2.0 x 5.0 m。随机设计用作统计模型，由两个受保护的耕种（在塑料盖下和塑料筛下）组成，重复七次。在乌拉伊进行的实验中，尚未证实受保护的耕作制度在葡萄的生产特性和浆果的化学特性（如可溶性固形物含量，成熟指数和pH）方面是否存在差异。已证实仅在叶子上就出现了霜霉病，在塑料覆盖下的葡萄藤中，霜霉病的发生率和严重性较低（分别为0.5％和0.02％）。在Marialva，塑料盖对葡萄的生产特性也没有影响。但是，塑料盖下的浆果的可溶性固形物含量高于塑料滤网下的浆果（分别为19.6和17.2oBrix）。在该位置的任何受保护栽培系统中均未检测到霜霉病的发生。结论是，使用塑料覆盖物可以减少用于控制霜霉病的杀真菌剂的使用次数，而'BRS Clara'葡萄的生产特性没有变化。

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