Sorghum-Sudan Grass Seed Sowing Methods and Key Cultivation Techniques
Sorghum-sudan grass is produced according to the principle of heterosis by crossing sorghum with sudan grass, and is a new forage grass most recently approved by the Third National Forage Variety Approval Committee. Sorghum-sudan grass combines the advantages of sorghum's thick stems and wide leaves with sudan grass's strong tillering and regrowth ability, and its heterosis is very obvious. So how are sorghum-sudan grass seeds sown? What cultivation methods are there? Let's take a look together below.
1. How are sorghum-sudan grass seeds sown?
Sorghum-sudan grass seeds are oval. Sowing time is generally chosen in spring, that is, between Qingming and Guyu. The low temperature at this time is 15 degrees Celsius, which is exactly the temperature suitable for sorghum-sudan grass seed germination.
Sorghum-sudan grass is a warmth-loving plant and is not drought-resistant at the seedling stage. Its more suitable growth temperature is 24°C-33°C. It has strong disease resistance and strong regrowth ability, and can be cut 3-4 times a year. The hay contains more than 15% crude protein and has a relatively high sugar content, making it suitable for silage. It is favored by various livestock and poultry, and the grass supply period is from May to October.
2. Cultivation methods for sorghum-sudan grass
1. Sowing period
The suitable soil temperature is 15 degrees. Spring sowing is suitable, and Qingming to Guyu is ideal.
2. Sowing method
Drilling or hole sowing can be used. The sowing rate per 667 sq m is 1.5-2.0 kg, the sowing depth is 3 cm, and the row spacing for drilling is 15-30 cm.
3. Field management
Before sowing, the land should be finely prepared and sufficient base fertilizer applied (5000 kg/mu of organic fertilizer). After emergence, thin and finalize the seedlings according to the density requirement; 30,000-50,000 plants can be retained per 667 sq m. The first cutting should be carried out 35-45 days after emergence. Too early results in lower yield, while too late causes the stems to age and affects regrowth. After that, cutting can be carried out again about every 20 days. It can be cut 4-7 times a year. In order to ensure high fresh grass yield throughout the year, the stubble should not be left too low at each cutting. Generally, the stubble height should be 10-15 cm, and 1-2 nodes should be left on the ground. After each cutting, topdressing should be carried out. Generally, about 8-10 kg of urea is applied per 667 sq m each time. After emergence, clean cultivation should be done 1-2 times. After each cutting, weeds are likely to grow, so timely intertillage is needed. Sorghum-sudan grass produces about 10,000 kg of fresh grass per 667 sq m, and high yield can reach more than 20,000 kg.
The above is an introduction to sorghum-sudan grass. Sorghum-sudan grass has high nutritional value, good palatability, strong regrowth ability, and strong tillering ability. Under irrigation conditions, it can be cut 1-2 times in the north, with a fresh grass yield of 6000-9000 kg per mu, and can be cut 3-4 times in the south, with the highest fresh grass yield of about 13 tons per mu. It is suitable for green feeding, silage, and can also be directly grazed and made into hay. Sorghum-sudan grass hay contains crude protein and has a relatively high sugar content, making it suitable for silage. It can be used to raise cattle, sheep, rabbits, geese, fish, and other livestock and poultry. It shows high quality and high yield in production, with obvious benefits.
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