PRODUCTIVE PERFORMANCE OF VERNALIZATED SEMI-NOBLE GARLIC CULTIVARS IN WESTERN RIO GRANDE DO NORTE STATE, BRAZIL

ABSTRACT: The objective of this work was to evaluate the development and production of semi-noble garlic cultivars subjected to different bulb-seed pre-planting vernalization periods in two municipalities (Barauna and Governador Dix-sept Rosado) of the Western Mesoregion of Rio Grande do Norte State, Brazil. Therefore, two simultaneous experiments were conducted, from April to November, 2012. A complete randomized block experimental design was used with four replications. The treatments were arranged in split-plot design, with the plots consisted of cultivars (Gigante-do-Nucleo and BRS-Hozan) and subplots consisted of bulb-seed pre-planting vernalization (4±1°C) periods (0, 10, 20 and 30 days). In Barauna, the cultivar Gigante-do-Nucleo proved to be adapted, with a yield of 4.56 Mg ha-1 without vernalization, while the BRS-Hozan presented a yield of 4.42 Mg ha-1 when vernalizated for 10 days at pre-planting. In Governador Dix-sept Rosado, the vernalization of 10 days improved the adaptation of both cultivars, however, with no significant yield increases. The use of vernalization improved adaptation of cultivars in the planting locations, facilitating the emergence of plants, increasing plant height and number of leaves, however, not promoting significant yield increases, therefore, this technology should not be used for produce this type of garlic in this region.

摘要：本研究旨在评估巴西北里奥格兰德州西部中地理区的两个市镇——巴拉乌纳（Barauna）与迪塞普特罗萨多州长镇（Governador Dix-sept Rosado）内，经不同播前种球（bulb-seed）春化（vernalization）处理时长的半优良大蒜品种的生长与生产表现。试验于2012年4月至11月同步开展两组实验，采用完全随机区组试验设计（complete randomized block design），设置4次重复。处理采用裂区设计（split-plot design）：主区为大蒜品种（Gigante-do-Nucleo与BRS-Hozan），副区为播前种球低温（4±1℃）春化处理时长（0、10、20、30天）。在巴拉乌纳市镇，Gigante-do-Nucleo品种展现出良好适应性，未进行春化处理时产量达4.56 吨/公顷；而BRS-Hozan在播前春化10天时的产量为4.42 吨/公顷。在迪塞普特罗萨多州长镇，10天春化处理可提升两个品种的适应性，但未带来显著增产。春化处理可改善品种在种植地的适应性，促进植株出苗、增加株高与叶片数，但未实现显著增产，因此该技术不适用于本地区该类大蒜的生产。