Seedling raising techniques of Sorghum

Sorghum is one of the most important food crops in China, which is planted all over the country. the seedling strength of sorghum determines the yield and quality of sorghum. It also determines the economic benefits of farmers. So how can we cultivate strong seedlings of sorghum? Let's take a look at the seedling techniques of sorghum.

1. Select improved varieties

In order to cultivate strong seedlings, we must first select improved varieties according to the local planting environment, soil and temperature. For example, in areas with lower elevations, we should choose varieties with low plants, high yield per unit area in the first season, and strong regeneration ability, such as red cherry seed and green shell ocean. If there is no double harvest and no regeneration, you can also choose ones with strong resistance, while those used to make wine are blindly replaced with red cherry seeds and green shell varieties.

2. Select the nursery site

The root system of sorghum is developed, and the adaptability to the soil is very strong, so the requirement for the soil is not high, and it can tolerate salt and alkali and barren. However, in order to cultivate strong seedlings, the soil of the seedling land is to choose the sandy loam with loose soil, deep soil layer and rich organic matter, and the seedlings are more sensitive to saline-alkali, so it is not suitable to raise seedlings in saline-alkali soil. Acid soil is planted after proper improvement.

3. Seed treatment

Before sowing 1, the seeds should be screened, small, shrunken and diseased seeds should be eliminated, and large and full seeds should be selected for production. In a sunny day, the selected seeds should be exposed for 2-3 days to improve their germination rate. Seed dressing was carried out before sowing to control diseases, element deficiency and underground pests.

4. Sowing seeds at the right time

Timely sowing is the premise of improving seedling germination, seedling alignment and strong seedlings. Sorghum is not tolerant to low temperature during germination. If sowing too early will lead to sprouting Hu, it is very easy to be disturbed by diseases and affect the yield, while sowing too late will affect the growth period. When sowing, the soil water content should be 20%, the late-maturing varieties should be sowed early, and the early-maturing varieties should be sowed late. Sowing should be reasonable and density should be controlled. Generally, the row spacing is about 15 × 20cm, the sowing depth is 3-5cm, and the soil cover is 2-3cm.

5. Seedling stage management

After sowing, the seedlings should be kept warm by plastic film mulching, when the seedlings grow to 3-4 leaves, when the seedlings grow to 3-4 leaves, when 5-6 true leaves are fixed, and when the seedlings are fixed, strong seedlings, weak seedlings and miscellaneous plants should be left. 2-3 times of intertillage should be carried out at the seedling stage, once in the seedling setting, the first 10-15 days after the seedling setting, and the third before the jointing stage, the middle tillage can be carried out together with weeding and topdressing to make the seedling grow strong. The water demand of sorghum in the seedling stage is 10% of that in the whole growth period, so we should pay attention to the change of water during this period, not too much or too little.

The above is the seedling technology of sorghum. I hope it can help you. If you want to know more about sorghum planting, please follow us.