Middle and late management

Sweet sorghum flowered to mature stage, fertility center shifted to grain maturation process and sweet sorghum stalk sugar accumulation process, grain yield and stalk sugar accumulation were basically synchronized. Pay attention to raising roots and protecting leaves to prevent premature aging. After the heading, if there is a phenomenon of defertilization, potassium dihydrogen phosphate solution can be used for foliar spraying to promote the growth and sugar accumulation. If smut is found in the field, remove the diseased plant in time and bury it.

Water and fertilizer management

Skillfully applying joint-fertilizers to apply basal fertilizers at the same time, according to the growing amount of topdressing, in order to facilitate the accumulation of sugar. In the middle and late stages of planting sweet sorghum, it is not advisable to apply too much nitrogenous fertilizer in order to prevent lustrous growth and affect the accumulation of sugar in the stems and the normal maturation of grains. This is the key to fertilization. Fertilizer can be used at the beginning of jointing, combined with the third cultivating fertilizer, 10-15 kg of urea topdressing, no fertilizer applied to the soil surface.

The total amount of water needed for timely irrigation of sweet sorghum is “two less and more in the middle”. The whole growth period irrigation 3-4 times. The first water is about 25-30 days after sowing and the jointing period (late July) is combined with topdressing; the second water is generally 15 days after the head water, after heading and flowering (mid-August); the third water, generally at 9 The grout period starts at the beginning of the month. In the latter stage of flooding, it is necessary to prevent low-lying water, and special attention should be paid to the weather process to prevent lodging.

Pest Control 1 Aphid can be sprayed with deltamethrin 1:2000 times solution or rapid killing D 5000-6000 times solution. 2 The hazards of diamond borer can be controlled by carbofuran sprinkled at the heart leaf. 3 When the ground tiger damages, the enemy will kill 50 grams of water and control 30-45 kilograms of water.

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