Three vigor zones, identified in a Barbera vineyard by remote sensing at full canopy, were carefully ground-truthed to determine, over 2 years, the relative weight of soil factors in affecting within-field variability, and to investigate vigor zone influence on dry matter (DM) and nutrient partitioning into different vine organs. Regardless of season, high vigor (HV) achieved stronger vine capacity as total vegetative growth and yield while resulting in markedly less ripened fruits than low vigor (LV) vines. PCA analysis carried out on ten different soil and vine variables clearly separated the three vigor levels and the correlation matrix highlighted that the factors mostly contributing to HV were soil depth, soil K and P concentration, total available water, clay fraction and N_leaf concentration. Conversely, sand fraction was the main marker for LV. When annual DM retrieved in clusters, canes, leaves, and shoot clippings was calculated for each vigor level and expressed as content (i.e. kg/ha) there was a general decreasing trend moving from HV to LV. However, when DM partitioned to each organ was given on a relative basis (i.e. percentage over total) results were similar across vigor levels. Similarly, when nutrients were given as content (e.g. kg or g/ha) out of 120 within-vigor combinations (12 nutrients, 2 seasons, 5 organs), 65 showed a significant difference between HV and LV. Conversely, with data expressed on a concentration basis (i.e. % DM) the number of significant differences between the vigor level means fell to 15. The study strengthens the causal link between soil properties and intra-vineyard spatial variability and clarifies that patterns of dry matter and nutrient partitioning to different vine organs are mildly affected by vine vigor when referred on a relative basis.

在 Barbera 葡萄园中通过全冠层遥感确定的三个活力区经过仔细地面实况，以确定 2 年多的土壤因素在影响田间变异性方面的相对权重，并调查活力区对干物质的影响(DM) 和营养分配到不同的藤蔓器官。无论季节如何，高活力 ​​(HV) 葡萄藤的总营养生长能力和产量都比低活力 (LV) 葡萄藤强，但果实成熟度明显降低。对十个不同的土壤和藤蔓变量进行的 PCA 分析清楚地分离了三个活力水平，相关矩阵突出显示，主要影响 HV 的因素是土壤深度、土壤 K 和 P 浓度、总有效水、粘土比例和 N_叶专注。相反，沙子分数是 LV 的主要标志物。当以簇、藤茎、树叶和剪下的枝条为每个活力水平计算年度 DM 并表示为含量（即 kg/ha）时，从 HV 到 LV 有一个普遍的下降趋势。然而，当 DM 分配到每个器官时，在相对基础上（即占总数的百分比）结果在活力水平上是相似的。类似地，当营养素以 120 种活力组合（12 种营养素、2 个季节、5 个器官）中的含量（例如 kg 或 g/ha）给出时，65 种显示出 HV 和 LV 之间的显着差异。相反，数据以浓度为基础（即 % DM）表示，活力水平平均值之间的显着差异数量下降到 15。