Abstract: Under the background of supply side reform of agriculture, the influence of stress of waterlogging on yield and quality at pod period of peanut could offer important scientific evidence for agricultural disaster prevention and reduction. Based on field experiments, the whole pod stage of summer peanut was divided into early, middle and late periods, and in each period, wet stress lasted 0 （control group）, 3, 5, 7 and 9 days respectively were set for studying the final impact of wet hazard on peanut. The results showed that, wet stress happened earlier and the days lasted longer, the greater was the impact on the production. The overall trend of influence showed the impact in early stage was bigger than that of middle stage and late stage, and the influence lasted 9 days was bigger than that of 7, 5 and 3 days. In early stage, 9 days lasted waterlogging reduced the pod yield, fruit weight and kernel weight by 21.8%, 16.2% and 24.6% respectively, and which were 15.7%, 8.6%, 14.2% in the middle stage. Stress of 3 and 5 days occurred in early and middle stage were positive, and the average yield increased 8%, however, the effect was negative when the stress lasted more than 7 days. Wet stained stress also influence the quality of seed kernel, and the influence degree was bigger in middle stage than late and early stage. Moisture, protein and oleic acid content increased, meanwhile, amounts of fat, linoleic acid and palmitic acid decreased, so the quality decreased. Moisture and fat content increased with the increase of the waterlogging days, while the rest of the quality index was not obvious correlated to hazard days.

Key words: peanut, pod period, waterlogging stress, yield, quality