Waterlogging is a stress that affects wheat (Triticum aestivum L.) and barley (Hordeum vulgare L. ssp. distichum) yield. This work aimed at analysing the impact of a waterlogging event during pre‐anthesis (critical period) on yield, its numerical components and their relationships with plant growth rate in wheat and barley. Two pot experiments were carried out under contrasting environmental conditions (early and late sowing date), in which six wheat and six barley cultivars were exposed to control and waterlogging conditions imposed c. 18 days prior to anthesis. Measurements included total above‐ground biomass at the beginning and at the end of the waterlogging treatment and at maturity, when grain yield and its numerical components were also measured. Wheat showed higher yield losses (−76%) due to waterlogging than barley (−49%). Grain yield was explained by both numerical components (the number of grains per plant and grain weight), which better correlated with the relative growth rate of plants during the post‐stress recovery than during the waterlogging period. Plant growth during the recovery period should be targeted as a key factor to estimate yield losses from waterlogging in these cereals.

中文翻译：

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淹水后（而非淹水期间）的植物生长率与小麦和大麦的产量响应更好地相关

渍水是影响小麦的应力（小麦L.）和大麦（大麦属亚种杉） 屈服。这项工作旨在分析花前期（关键时期）内的涝灾事件对小麦，大麦产量，其数量成分及其与植物生长率之间的关系的影响。在不同的环境条件下（播种的早晚）进行了两个盆栽试验，其中六个小麦和六个大麦品种暴露于对照和涝渍条件下。花前18天。测量包括浸水处理开始和结束时以及成熟时的地上总生物量，此时还测量了谷物产量及其数值成分。小麦因淹水而表现出的单产损失（−76％）比大麦（−49％）高。谷物产量可以通过两个数值成分（每株植物的谷物数量和谷物重量）来解释，与淹水期相比，在胁迫后恢复期与植物相对生长率的相关性更好。恢复期的植物生长应作为估算这些谷物因涝渍而造成的产量损失的关键因素。