The sesame grows rapidly in the flowering and pod-growing period. At this time, vegetative growth and growth go hand in hand, and it is also the period of peak fertilizer demand. The nutrients absorbed during this period account for 70% to 80% of the entire growth period. Practice has shown that topdressing can increase production by more than 30%. It is more convenient to use chemical fertilizers for flower fertilization, and it is also possible to apply decomposed cake fertilizer, manure, and manure fertilizers. Drilling should be carried out in the middle of the row, or in the middle of a row. Apply about 10 centimeters into the soil to absorb the roots, cover the soil after application, and remove field weeds. In the case of sowing, in addition to cooked cake fertilizer or granular urea can be mixed with soil spread, then cultivating loose soil cover fertilizer, all kinds of other fertilizers should be open-point application, avoid application to prevent fertilizer adhere to the sesame leaves On the hair, cause burning seedlings. When the weather is dry, irrigation can be performed after application to fully realize the fertilizer effect. Generally 5 to 8 kg of urea per acre.
In addition, when the sesame begins to bloom, it should also be sprayed with fertilizer. Sesame stalks erect, broad leaves, stems, leaves, flowers on the hair dense, strong ability to receive and adhere to fertilizer, spraying fertilizer with low leaf cost, high work efficiency, water and fertilizer with the effect of good complement, spray fertilizer can also be used to control pests Combine. According to the experiment, spraying potassium dihydrogen phosphate two times during the flowering period increased the average grain weight by 0.09 g and increased the yield by 19%. Spraying twice is sprayed once at the first flowering stage, and sprayed for another time every 5 to 7 days. Generally, 200-250 g of monopotassium phosphate is used per mu, and diluted to 50-62. 5 kg and then sprayed on the front and back of the blade. , should choose to do cloudy or sunny evening, to avoid interference with high temperature and dry hot air when spraying fertilizer, reduce the evaporation of nutrient solution water, more conducive to the absorption of nutrients by the leaves.
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