When will sorghum be planted?

Sorghum is one of the ancient cereals in China. Sorghum can be divided into grain sorghum, sugar sorghum and forage sorghum according to different uses, which are widely used and have high planting value.

In the process of sorghum planting, how to achieve high quality and high yield is the key to improve farmers' economic benefits.

Today, Bian Xiao will tell you about the planting time, planting technology and field management technology of sorghum! 1. When is the planting time of sorghum? Sorghum can be divided into spring seeds and autumn seeds.

The sowing period of spring sowing crops is from the end of March to the middle of April in the lunar calendar, so it should not be too early. Because the early sowing temperature is low and the growth is slow, it is easy to die when it meets the cold current. Autumn crops should be sown between the end of May and the end of June in the lunar calendar, and the time should not be too late, so as to avoid low temperature in the middle and late stages of growth, affecting growth and delaying maturity.

2. High-yield planting techniques of sorghum 1. Land selection: Sorghum has developed root system and strong water absorption and fertility, so it is advisable to choose flat, loose and fertile plots for planting. Because of its characteristics of drought resistance, waterlogging resistance, saline-alkali resistance and barren resistance, low-lying waterlogging-prone plots or barren arid saline-alkali plots can also be planted, and the requirements for previous crops are not strict.

2. Soil preparation: The quality of sorghum soil preparation is the key to grasp the whole seedling and determine the yield. Before sowing, we should do a good job of fine soil preparation, rake carefully, advocate autumn soil preparation, ensure soil moisture in spring, and do autumn ploughing, raking and ridging.

3. Rotation: Continuous cropping of sorghum should be avoided. Reasonable rotation mode is the key to increase sorghum production. The ideal previous crop is soybean stubble, followed by corn stubble and potato stubble. Because it is sensitive to pesticides, it is forbidden to choose plots with long-lasting pesticides applied in the previous crop.

4. Spacing seedling and fixing seedling: Sorghum seedlings should be planted in 3-4 leaf stage and fixed in 5-6 leaf stage. When fixing seedlings, leave seedlings at equal intervals, leave strong seedlings and normal seedlings, and leave no two seedlings and two seedlings. Miscellaneous plants should also be pulled out to improve the purity and give play to the yield-increasing effect of improved varieties.

5. Timely intertillage: the 65438th intertillage at sorghum seedling stage is combined with fixed seedlings, and the second intertillage is carried out after 10- 15 days. The intertillage before and after jointing should be combined with topdressing and soil improvement to promote the growth of sorghum and enhance the ability of windproof, lodging resistance and soil water storage and moisture conservation.

6. Irrigation management: The water demand of sorghum in seedling stage accounts for about 65,438+00% of that in water requirement during whole growth stages, 50% in jointing and booting stage, 65,438+05% in booting stage to flowering stage, 20% in filling stage, and about 5% in mature stage, with emphasis on proper irrigation at jointing and booting stage, flowering stage and filling stage.

7. Reasonable topdressing: The fertilizer should not be exposed on the surface when the sorghum is topdressing, and it should be watered in time after topdressing. Each topdressing and watering should be controlled according to crop growth and weather conditions.

After sorghum emergence, seedling fertilizer can be applied according to the emergence situation; At the jointing stage of sorghum, decomposed agricultural fertilizer 1000 kg/mu and urea 10- 15 kg/mu can be applied; Sorghum can be applied with 1000 kg/mu of agricultural fertilizer and 20 kg/mu of urea at booting stage; Agricultural chemical fertilizer 1000 kg/mu and urea 8- 10 kg/mu can be applied to sorghum during grain filling; Spraying appropriate amount of potassium dihydrogen phosphate from heading to filling stage of sorghum can promote early maturity and increase yield.

Three. Sorghum field management: (1) interplanting: the first interplanting is carried out when the height of sorghum seedlings is 15cm 20-25 days after sowing, and the second interplanting is carried out when the height of sorghum seedlings is 25-30cm, and then the plant spacing is kept at about 10cm. If you find missing plants, you can dig seedlings.

(2) Intertillage weeding: During the growth of sorghum, according to the occurrence of weeds, implement intertillage weeding for 2~3 times, especially in the early growth stage, pay special attention to weed removal, so as not to affect the development.

If herbicides are used, they should be sprayed after sowing and covered with soil before germination.

(3) Soil cultivation: After the first intertillage weeding, topdressing should be done immediately beside the plants, and soil ridges should be cultivated on the stems of the plants to prevent lodging and promote development.

(4) Drainage and irrigation: Sorghum is drought-tolerant, but in case of drought in the young spike formation period (about 35 days after sowing), (about 60 days after sowing) and milk ripening period (about 75 days after sowing), the yield is greatly affected, so irrigation should be appropriate.

In rainy season, the accumulated water should be removed at any time to avoid pests and diseases and prolong the maturity.