ABSTRACT

In recent years, the economic impact of the grape and wine industry within Texas has significantly increased. The majority of grapes grown in Texas are produced within the Texas High Plains American Viticultural Area (AVA). Vineyards within this AVA are subject to late spring frosts that may potentially reduce crop yields, and lower fruit quality. Objectives of this experiment were to compare the growth and fruitfulness of shoots grown from primary and secondary buds of V. vinifera ‘Grenache’ vines grafted onto three rootstocks (110 R, 1103P, and Freedom). Over two growing seasons, field-grown vines were exposed to the following treatments: primary bud growth and forced secondary bud growth (simulated late spring frost). Leaf gas exchange, pruning cane weight, vine yield, and fruit maturity data were collected each year. Bud treatment or rootstock did not influence leaf gas exchange. Cane weight and yield data were greater for shoots grown from primary bud shoots, and rootstock 1103P. In addition, berries grown from primary buds and 1103P rootstocks were more mature compared to fruits from secondary buds or vines grown on other rootstocks. Results offer insight into the potential interaction of ‘Grenache’ scions with grafted rootstocks during a late spring frost within the Texas High Plains AVA.

摘要

近年来，德克萨斯州葡萄和葡萄酒行业的经济影响显着增加。德克萨斯州种植的大部分葡萄都产自德克萨斯高平原美国葡萄种植区 (AVA)。该 AVA 内的葡萄园受到晚春霜冻的影响，这可能会降低作物产量并降低果实质量。本实验的目的是比较V. vinifera初级和次级芽的芽的生长和结果'Grenache' 藤蔓嫁接到三个砧木（110 R、1103P 和 Freedom）上。在两个生长季节，田间种植的葡萄藤接受了以下处理：初生芽生长和强制次生芽生长（模拟晚春霜冻）。每年收集叶片气体交换、修剪甘蔗重量、葡萄产量和果实成熟度数据。芽处理或砧木不影响叶片气体交换。从初级芽芽长出的芽和砧木 1103P 的甘蔗重量和产量数据更大。此外，与次生芽或其他砧木上生长的藤蔓相比，从初级芽和 1103P 砧木生长的浆果更成熟。结果提供了洞察“歌海娜”接穗与嫁接砧木在德克萨斯高原 AVA 晚春霜冻期间的潜在相互作用。