The bud sheath is short, the emergence force is weak, sowing depth of 2.5-3cm is appropriate. Fast-acting fertilizers can be applied during the reproductive period. The field of good growth in the early stage, the late stage should not be single application of large amounts of nitrogen fertilizer, so as not to cause stalk collapse, not conducive to the accumulation of sugar and affect the quality of syrup. Each ton of fresh stalks generally absorbs 1.5kg of pure nitrogen, 0.3kg of phosphorus, 1.8kg of potassium, 0.6kg of calcium, 0.3kg of magnesium. 60,000-90,000 seedlings per hectare. Before sowing sweet sorghum, use farmyard manure and nitrogen, phosphorus and potassium fertilizers as the bottom fertilizer, plough the land smooth, and then, take the method of spot sowing. Specific requirements are: row spacing 50 cm, plant spacing 25 cm ~ 30 cm. The depth of the pit is the same as the depth of planting common sorghum. Put 5 to 6 seeds in each pit. Then use the soil to bury the pit flat. When the seedlings reach 30 centimeters, set one seedling and pull out the excess seedlings. When the seedlings grow to the middle stage, apply fertilizer again, no or less nitrogen fertilizer, so as not to affect the sugar content of the stalks, to apply phosphorus fertilizer and potash fertilizer (more potash fertilizer). To maintain soil nutrients and humidity, hoeing at the right time. Harvesting is done by chopping off the leaves, then using a sickle to cut and put down the stalks at 30 centimeters from the ground, and cutting down the sorghum spike. The sugarcane is stored in a cool place for 3 to 5 days, and the stalks have the highest sugar content. Sweet sorghum grows in arid areas and is resistant to drought, flooding and salinity, and can be grown in most semi-arid areas of the world where poor people live.
Fine land preparation and adequate bottom fertilizer Sweet sorghum can be grown on dry, flooded and barren land in the suburbs of Beijing. Its seeds are small, and the topsoil ability is weak, requiring fine plowing and harrowing to ensure that the seedlings. With the whole land per mu bottom fertilizer, strip (furrow bottom) 30 kg of compound fertilizer, or urea 10 kg. Improve the quality of sowing, ensure that all seedlings Beijing area summer sowing period the earlier the better. The amount of seeding is generally 0.5 kg per mu. Sowing method is best to use the corn no-till precision sowing machine sowing, or with the size of the other varieties of seeds similar to the frying of the seeds, mixed evenly, mixed sowing in the good seeds to be sown. Sowing depth is generally 3 cm to 4 cm, and should not be too deep. Appropriate dense planting to promote high yield Leave 6,000 to 8,000 seedlings per mu, but should not exceed 10,000 plants. In the 3-leaf to 5-leaf period, one time between the seedlings to complete, plant spacing 15 cm ~ 17 cm × 60 cm ~ 70 cm. Silage production does not need to remove the tiller, if the grain and feed use need to remove the tiller. Tillage cultivation, clever use of water and fertilizer In sweet sorghum growth to the six-leaf period, moderate tillage cultivation (10 cm deep), conducive to the prevention of collapse, strong seedlings. Summer sowing sweet sorghum only a crop, the nitrogen fertilizer should not be too much, so as not to greedy green futile growth, affecting the accumulation of sugar in the stalks. Plant height of 70 cm, 30 kg of urea per mu can be applied. Dryland can grasp the rain, fertilizer before the rain, after the rain plowing. Seedlings do not need much water. After the nodulation into the spike differentiation, the lack of water affects the yield, the pregnancy spike period is sensitive to the lack of water, the flowering period is the peak of water demand. Prevention and control of pests and weeds Chemical weed control after sowing, the use of a row of Razin 150 grams per mu ~ 200 grams of field closure, can basically control weeds in the field. Sweet sorghum is susceptible to aphids and stem borers. Prevention and control of aphids can choose pollution-free pesticides or deltamethrin, cypermethrin, EB-82 mirex and so on. To control stem borers, granular furadan can be used to spread the heart, but also aphids. Timely mowing, high yield and high quality Usually the best mowing period is from the end of milk ripening to the early stage of wax ripening. According to the law of sugar and the purpose of utilization to determine the appropriate time to harvest. Sugar production for the purpose of the stalks should be harvested at the peak sugar content, while removing the leaf sheaths. For solid fermentation of wine, the leaf sheaths are blown out by guillotine blowing in the process of straw crushing. For forage purposes, the grain is harvested at maturity or not and is then silaged. Sugar sorghum is characterized by high grass production and excellent grass quality .
Sweet sorghum silage is similar to corn silage. Sweet sorghum can also be directly green fodder. But it must be noted: sweet sorghum green leaves contain cyanogenic glycosides, growth stage it is hydrolyzed to produce harmful substances hydrocyanic acid, livestock consumption of hydrocyanic acid-rich sorghum has the risk of poisoning. When silage is made from forage sweet sorghum, the toxic components will be degraded, so poisoning will not occur. When making hay, care should be taken to avoid mowing and drying on rainy days, otherwise it is easy to cause sugar loss. Feeding with other pasture with feeding, is conducive to improving the utilization of nutrients .