The application amount of basal fertilizer is generally 30-60 tons of organic fertilizer per hectare, and the phosphorus-deficient land with low fertility should be applied with 300-500 kg of superphosphate. Fertilizers Ammonium sulphate is safer in commonly used fertilizers. 100-150 kg per hectare is appropriate. If nitrogen and phosphorus compound fertilizer is applied as a seed fertilizer, it is convenient and effective, and it is commonly used as diammonium phosphate. The amount per hectare is 150 kg. The top-dressing period is mainly the jointing period and the flag-raising period, but the fertilizer is usually chased once in production, and the effect of top-dressing at the jointing stage is better. The topdressing amount is generally 300-450 kg urea per hectare. For example, plots with long growing period or late defertilization can be divided into 2 applications. The principle of “light weight before and after weight†should be mastered. That is, jointing fertilizer accounts for 2/3 of the topdressing amount, and the remaining 1/3 is in the flag. Top-dressing.
Sorghum smut, also known as Umi, black package, etc., is a common and highly harmful type of disease on sorghum.
Control methods:
1. (1) Rotation (2) Before seeding, 25% triadimefon wettable powder can be used for seed dressing. Stir in 0.3~0.5% of seeds.
2, sorghum leaf spot, anthrax disease is more serious, the leaves turn into purple quickly and dry, causing straw, seriously affecting the yield.
Control methods: (1) Take agricultural technology control measures as the main, and chase fertilizer materials to promote plant growth and robustness, and enhance disease resistance. (2) Chemical control 70% thiophanate-methyl WP can be sprayed with 2000 times liquid, 100-125 kg per mu.
3, underground pests are mainly cockroaches, cockroaches, wireworms, etc.
Control methods: In addition to seed dressing with seed coating Ji Nong 3, 50% phoxim EC can also be used 0.5 kg water 12.5 kg, each kg of diluted liquid can be mixed with 10 kg of seeds, mixed after bored for 3 hours to 4 hours After soaking, sowing.
4, high locust
Control method: Apply 40% Dimethoate Emulsion to water 50~80 times liquid to smear the stem and use 40% Dimethoprime to water 2,000 times to spray.
5, armyworm control methods
Use 50% phoxim emulsion with 50~100g/mu or 20% speed kill anti-emulsion with 20~30g/mu to prevent
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