The study of the impact of climate change on crop production requires the examination of cultivar adaptation and performance in response to interannual variability in climate and field conditions. A field test was carried out during four years in Eastern New Brunswick, Canada, to study grain yield, fiber yield and floral cannabidiol content of eight Canadian industrial hemp (Cannabis sativa L., Cannabaceae) cultivars. Hemp performance in terms of grain and fiber production varied greatly between the years. The spatial location of plants in the field was shown to affect the performance of cultivars in different ways for grain and fiber yield. Grain yield was the highest in hot and humid summers, the opposite was observed for cannabidiol content, while fiber production was the highest in cold and humid summers. Our results indicated that grain, fiber or cannabidiol production cannot all be optimized under the given set of climatic conditions and that hemp performance is more sensitive to interannual variability of climatic conditions and intra-field variability than to cultivar effects. Yet, despite the considerable spatiotemporal variability documented, some cultivars have repeatedly exhibited the best performance, demonstrating excellent adaptation to local field conditions.

研究气候变化对作物生产的影响需要检查品种对气候和田间条件的年际变化的适应性和性能。在加拿大东新不伦瑞克省进行了为期四年的田间试验，研究了八种加拿大工业大麻（Cannabis sativa ）的谷物产量、纤维产量和花卉大麻二酚含量。L., Cannabaceae) 栽培品种。多年来，大麻在谷物和纤维生产方面的表现差异很大。研究表明，田间植物的空间位置以不同的方式影响品种在谷物和纤维产量方面的表现。炎热潮湿的夏季谷物产量最高，大麻二酚含量相反，而寒冷潮湿的夏季纤维产量最高。我们的研究结果表明，在给定的一组气候条件下，谷物、纤维或大麻二酚的生产不能都得到优化，并且大麻性能对气候条件的年际变化和田间变化比对品种效应更敏感。然而，尽管记录了相当大的时空变异性，但一些品种一再表现出最佳性能，