Productive performance of blackberry cultivars in altitude region

ABSTRACT: Information on the production performance of blackberry in less colder regions are fundamentals to the expansion of the cultivated area and extension of management practices for cultivars adapted to climate conditions in Brazil. The research was carried out with the aim to evaluate the productive performance of different blackberries cultivars in altitude region of 1,387m with mild temperatures, situate at 18º14’56”S, 43º36’0”W, in Minas Gerais State, Brazil. It was carried during the seasons 2013/2014, 2014/2015 and 2015/2016. The blackberry cultivars evaluated were the following ones ‘Brazos’, ‘Guarani’, ‘Tupy’ and ‘Xavante’. Flowering and harvesting of cultivars were evaluated as well as climatological data of the area in order to relate the number of hours of accumulated cold less than 13°C, 10°C and 7.2°C with production and crop time. To determine the production, the mass of blackberries harvested per plant was measured. Production of blackberry cultivars was extended in altitude region with similar productivity to the other producing regions in Brazil. Productive performance of the cultivars varied according to the accumulation of cold hours with mild temperatures that occurred in cultivation region. ‘Brazos’, ‘Guarani’, ‘Tupy’ and ‘Xavante’ showed good adaptation, being ‘Brazos’ the cultivar most productive.摘要：针对适配巴西当地气候的黑莓栽培品种，其在相对温和冷凉区域的生产性能相关数据，是扩大栽培面积、推广配套栽培管理技术的核心依据。本研究于巴西米纳斯吉拉斯州（Minas Gerais）南纬18°14′56″、西经43°36′0″，海拔1387米的温和低温区域开展，旨在评估不同黑莓栽培品种的生产性能。试验周期涵盖2013/2014、2014/2015及2015/2016三个生长季。供试黑莓栽培品种包括‘Brazos’、‘Guarani’、‘Tupy’及‘Xavante’。研究同时测定了各品种的开花期与采收期，并收集试验区域的气象数据，以分析低于13℃、10℃与7.2℃的累积低温小时数与产量及生育期的关联。产量测定以单株采收黑莓的总重量为指标。结果表明，供试黑莓栽培品种在该海拔区域均可实现正常生产，且单产水平与巴西其他黑莓主产区基本持平；各栽培品种的生产性能随试验区域内温和低温环境下的累积低温时长变化而存在差异。供试的‘Brazos’、‘Guarani’、‘Tupy’及‘Xavante’四个品种均表现出良好的环境适应性，其中‘Brazos’的产量最高。