Hybrid coffee cultivars may enhance agroecosystem resilience to climate change

Anthropogenic climate change is predicted to cause shifts in temperature and precipitation patterns that will be detrimental for global agriculture. Developing comprehensive strategies for building climate resilient agroecosystems is critical for maintaining future crop production. Arabica coffee (Coffea arabica) is highly sensitive to the quantity and timing of precipitation, so alterations in precipitation patterns that are predicted under climate change are likely to be a major challenge for maintaining coffee agroecosystems. We assessed cultivar selection as a potential component of more resilient coffee agroecosystems by evaluating water stress responses among five Arabica coffee cultivars (clonal hybrids H10 and H1 and seedling lines Catuai 44, Catuai, and Villa Sarchi) using a precipitation reduction experiment in the highlands of Tarrazú, Costa Rica. During the first harvest (eighteen months after planting), plants under the rainout treatment had 211% greater total fruit weight ...

人为气候变化预计将引发温度与降水格局的改变，这将对全球农业产生不利影响。制定构建气候韧性农业生态系统的综合策略，对维持未来作物生产至关重要。小粒种咖啡（Arabica coffee, Coffea arabica）对降水的总量与发生时段极为敏感，因此气候变化情景下预估的降水格局改变，或将成为维持咖啡农业生态系统的一大挑战。为将品种筛选作为构建高韧性咖啡农业生态系统的潜在途径，我们于哥斯达黎加塔拉珠（Tarrazú）高地开展降水减少试验，对5个小粒种咖啡品种（无性杂交种H10、H1以及实生苗品系卡杜艾44（Catuai 44）、卡杜艾（Catuai）和比利亚萨尔奇（Villa Sarchi））的水分胁迫响应展开评估。在首个收获季（种植后18个月），避雨处理组植株的总果实重量提升了211%……