How many tons per mu can high-yield sweet sorghum cultivation reach?

The high-yield record for sweet sorghum stalks is 168 tons/hectare. The high-yield record for grain is 6 tons/hectare. In addition, the fiber content of sweet sorghum stalks is around 14-18%, with fiber yield reaching 9-15 tons per hectare.

High-Yield Cultivation Techniques for Sweet Sorghum

1. Reasonable Crop Rotation

Sorghum should not be planted continuously and is suitable for rotation. Continuous cropping will not only greatly reduce its yield, but also make it prone to pests and diseases. Because its plants are relatively tall, have well-developed root systems, and are strong at absorbing water and nutrients, reasonable crop rotation is the best approach.

2. Land Preparation and Fertilization

Before planting, deeply plow the soil to make it loose, and pay attention to evenness when preparing the land. After land preparation, sufficient base fertilizer needs to be applied, which can enable the seedlings to grow quickly.

3. Seed Treatment

To achieve the goal of high yield, when selecting seeds, combine them with the local planting environment and choose varieties with strong drought resistance, lodging resistance, and disease resistance. When selecting seeds, choose plump grains. First, they need to be exposed to the sun for 2-3 days, which can kill bacteria on the seed surface and increase the seed germination rate. Then use warm water to soak the seeds and promote sprouting. Soak the seeds in warm water for 12 hours, then wrap them in a wet gauze and place them in a greenhouse to promote sprouting. Take them out once a day and rinse them with clean water. Once the seeds show sprout tips, they can be sown.

4. Timely Sowing

Sorghum has different temperature requirements at each growth stage. For example, the minimum germination temperature is 6-7 degrees, while the emergence temperature is 20-25 degrees, so the sowing time must be controlled well. If the best sowing time is missed, it will lead to poor plant growth and reduced yield. Generally, the best sowing time is in early May. Drilling or hill sowing can be used. When sowing, pay attention to reasonable close planting, control plant and row spacing, and cover with soil and press down after sowing.

5. Field Management

Field management is divided into early, middle, and late stages. The early stage is mainly seedling management, promoting the growth and development of the seedling root system to achieve the goal of strong seedlings. When sorghum seedlings grow 2-3 true leaves after emergence, weak seedlings, diseased seedlings, and small seedlings need to be removed. The middle stage mainly promotes plant growth, strengthens fertilizer and water management, and carries out intertillage and weeding, etc., to ensure normal panicle differentiation and achieve the goal of high yield. The late stage is mainly maintenance, preventing premature aging of the plants, promoting early maturity, and increasing grain weight.

An important factor affecting high yield in sweet sorghum is pests and diseases. The pest and disease protection work for it mainly involves the use of some agricultural chemicals with prevention as the main approach.