Skillful use of growth regulators to promote recovery of sesame

Due to the high groundwater level in some sesame producing areas, the recent heavy rainfall caused too much water in the sesame field, resulting in wilting of sesame plants, stagnation of growth and development, falling of flowers and capsules, and even death of some plants, which affected the production of sesame in our province. In view of the current disaster situation of sesame in our province, the following measures can be taken: seize the opportunity to eliminate stagnant water in the field as soon as possible, dig drainage ditches according to the topography of the field for artesian drainage, and cast "waterproof walls" around low-lying places. Use a pump for mechanical drainage to ensure that the indicated water and stagnant water in the plough layer are discharged from the field within 24 hours. Ploughing and loosening soil moisture according to weather conditions, ploughing and loosening soil should be carried out in time to reduce soil moisture and increase roots. Ploughing should not be too deep, so as not to hurt too many roots and affect the growth of sesame seeds. In addition, combined with mid-tillage to cultivate soil, do a good job of burying roots and preventing toppling, so that there is sufficient water and fertilizer, which is conducive to the restoration of root growth. Topdressing the land damaged by waterlogging in time will lead to serious loss of soil nutrients, so it is necessary to topdressing and replenishing nutrients in time, generally applying 7kg urea per mu. The main types of topdressing are nitrogen and potash fertilizer, combined with a certain amount of phosphate fertilizer, and the best topdressing method is hole application or furrow application. Foliar fertilizer can be sprayed with root topdressing. After removing stagnant water in the field, 1% 2% urea solution and 0.2% potassium dihydrogen phosphate solution or 5% plant ash solution are sprayed 30 kg per mu. At the same time, 40% carbendazim suspension 700 times and 40% omethoate 1000 times 1500 times were sprayed to prevent sesame diseases and insect pests after the disaster, and sprayed again every 5-7 days. The utilization experiment of growth regulators showed that growth regulators could effectively alleviate the waterlogging injury of sesame. Ethephon: ethephon not only promotes ripening, but also promotes the growth of seedlings. In the aspect of waterlogging resistance, ethephon is needed to participate in adventitious root proliferation and root cortex aerenchyma formation under flooded conditions. Cytokinin: the experiment of Provincial Academy of Agricultural Sciences showed that the photosynthetic rate of sesame increased slightly after the application of cytokinin, which could reduce the waterlogging loss of sesame, and dwarf had a similar effect. Therefore, after the occurrence of waterlogging in the middle and later stage of sesame growth, spraying 50 × 10 ~ 6 to 200 × 10 ~ 6 cytokinins and other growth-promoting regulators can alleviate the waterlogging and increase the yield. In the area where sesame is prone to waterlogging, in order to resist waterlogging, 100 × 10 ~ (- 6) to 200 × 10 ~ (- 6) ethephon, active rooting agent and Yemanbao can be sprayed in sesame seedling stage to improve the structure of sesame root. improve the resistance and repair ability of sesame in adversity such as disease and waterlogging.