PDF(Pubmed)
Abstract：
UNASSIGNED: Waterlogging is one vast environmental constraint that limits crop growth and yield worldwide. Most major crop species are very sensitive to waterlogging, leading to enormous yield losses every year. Much is already known about wheat, barley or maize; however, hardly any data exist on oat and its tolerance against waterlogging. Thus, this study aimed to investigate if oats can be an adequate alternative in crop rotation under conditions of temporal submergence and if cultivar differences exist. Furthermore, this study was to test (1) whether yield was differently affected when stress is applied at different developmental stages (BBCH 31 and 51), and (2) nutrient imbalances are the reason for growth restrictions.
UNASSIGNED: In a large-scale container experiment, three different oat varieties were cultivated and exposed to 14 consecutive days of waterlogging stress at two developmental stages.
UNASSIGNED: Even though vegetative growth was impaired after early waterlogging and which persists till maturity, mainly due to transient nutrient deficiencies, growth performance after late waterlogging and grain yield of all three oat varieties at maturity was not affected. A high tolerance was also confirmed after late waterlogging in the beginning generative stage: grain yield was even increased.
UNASSIGNED: Overall, all oat varieties performed well under both stress treatments, even though transient nutrient imbalances occurred, but which were ineffective on grain yield. Based on these results, we conclude that oats, independently of the cultivar, should be considered a good alternative in crop production, especially when waterlogging is to be expected during the cultivation phase.
UNASSIGNED: In a large-scale container experiment, three different oat varieties were cultivated and exposed to 14 consecutive days of waterlogging stress at two developmental stages.
UNASSIGNED: Even though vegetative growth was impaired after early waterlogging and which persists till maturity, mainly due to transient nutrient deficiencies, growth performance after late waterlogging and grain yield of all three oat varieties at maturity was not affected. A high tolerance was also confirmed after late waterlogging in the beginning generative stage: grain yield was even increased.
UNASSIGNED: Overall, all oat varieties performed well under both stress treatments, even though transient nutrient imbalances occurred, but which were ineffective on grain yield. Based on these results, we conclude that oats, independently of the cultivar, should be considered a good alternative in crop production, especially when waterlogging is to be expected during the cultivation phase.
摘要：
■内涝是限制全球作物生长和产量的一个巨大的环境制约因素。大多数主要作物品种对内涝非常敏感,导致每年巨大的产量损失。关于小麦已经知道了很多，大麦或玉米；然而，几乎没有关于燕麦及其抗涝能力的数据。因此，这项研究的目的是调查，如果燕麦可以作为一个适当的替代作物轮作条件下的时间淹没，如果品种差异存在。此外，这项研究是为了测试（1）在不同的发育阶段施加胁迫时，产量是否受到不同的影响（BBCH31和51），(2)营养失衡是生长受限的原因。
■在大型容器实验中，栽培了三个不同的燕麦品种，并在两个发育阶段连续暴露于14天的淹水胁迫中。
■即使在早期淹水后营养生长受损并持续到成熟，主要是由于短暂的营养缺乏，晚涝后的生长性能和成熟时所有三个燕麦品种的籽粒产量均未受到影响。在开始的生成阶段晚涝后，也证实了高耐受性：谷物产量甚至增加。
■总的来说，所有燕麦品种在两种胁迫处理下表现良好，即使发生了短暂的营养失衡，但对谷物产量无效。基于这些结果,我们得出的结论是燕麦，独立于品种，应该被认为是作物生产的一个很好的选择，特别是在种植阶段预计会出现内涝时。
■在大型容器实验中，栽培了三个不同的燕麦品种，并在两个发育阶段连续暴露于14天的淹水胁迫中。
■即使在早期淹水后营养生长受损并持续到成熟，主要是由于短暂的营养缺乏，晚涝后的生长性能和成熟时所有三个燕麦品种的籽粒产量均未受到影响。在开始的生成阶段晚涝后，也证实了高耐受性：谷物产量甚至增加。
■总的来说，所有燕麦品种在两种胁迫处理下表现良好，即使发生了短暂的营养失衡，但对谷物产量无效。基于这些结果,我们得出的结论是燕麦，独立于品种，应该被认为是作物生产的一个很好的选择，特别是在种植阶段预计会出现内涝时。
