Coastal farmers are the first group of people who feel climate-related calamities most severely, such as sea-level rise, salinity intrusion, coastal flooding, tidal surges and tropical cyclones. They are operating agricultural activities under these climatic conditions that affect farm productivity. This study explores farmer perceptions of changes in farm productivity and perceptions of causes of decreased farm productivity (if any) over the past 10 years compared with more than 10 years back. We partitioned the causes of decreased farm productivity into climatic and non-climatic based on the primary data collected through household survey in ten coastal subdistricts along the coast of the Bay of Bengal. We visited 381 households during September–October 2018 using a pre-tested structured interview schedule. Average monetary farm productivity in the study area was 1.98. A small proportion (11%) of the sampled farmers mentioned that farm productivity had decreased over the past years. A majority (64%) of them believed that climate change was responsible for such decreases in farm productivity. The farmers who thought that climate change was causing the decreased farm productivity were characterized by greater education, more awareness of climate change, less communication with extension agents, stronger belief in decreased cyclone and salinity, and weaker belief in decreased flood. The farmers perceived that dry period salinity, flood and coastal inundations were the major products of climate change to adversely affect crop productivity. Since agricultural adaptation to climate change requires clear understanding of the climatic impacts on farm productivity, and more than one-third of the farmers failed to identify climatic impacts on decreased farm productivity, their improvement of climate change awareness is essential. Extension organizations and other agents should promote updated climate knowledge among farmers to make them more aware of climate change issues, so that they can adapt to climate change through their agricultural activities.

中文翻译：

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感知农场层面气候对孟加拉国沿海农业生产力的影响

沿海农民是第一批感受到气候相关灾害最严重的人群，例如海平面上升、盐分入侵、沿海洪水、潮汐浪涌和热带气旋。他们在这些影响农业生产力的气候条件下从事农业活动。本研究探讨了过去 10 年与 10 多年前相比，农民对农场生产力变化的看法以及对农场生产力下降原因（如果有的话）的看法。我们根据通过孟加拉湾沿岸 10 个沿海分区的住户调查收集的原始数据，将农业生产力下降的原因分为气候和非气候原因。我们在 2018 年 9 月至 10 月期间使用预先测试的结构化访谈计划访问了 381 个家庭。研究区的平均货币农场生产力为 1.98。一小部分（11%）的抽样农民提到过去几年农场生产力下降。他们中的大多数 (64%) 认为气候变化是造成农业生产力下降的原因。认为气候变化导致农业生产力下降的农民的特点是受教育程度更高，对气候变化的认识更高，与推广人员的沟通更少，对气旋和盐度降低的信念更强烈，对洪水减少的信念更弱。农民认为干旱期盐度、洪水和沿海洪水是气候变化的主要产物，对作物生产力产生不利影响。由于农业适应气候变化需要清楚地了解气候对农业生产力的影响，超过三分之一的农民未能识别气候对农业生产力下降的影响，因此他们提高气候变化意识至关重要。推广组织和其他机构应向农民推广最新的气候知识，使他们更加了解气候变化问题，从而通过农业活动适应气候变化。