Oil sunflower is one of the four major oil crops in China, and sunflower discs and straw can also be used accordingly. In recent years, the planting area of ​​oil sunflower has been continuously expanding, but there have also been many problems in production.
1, irrational fertilization
Do not pay attention to the application of organic fertilizer, what fertilizer is used in the home what fertilizer, not according to the fertilizer needs of the crop for reasonable fertilization.
2, serious phenomenon
Heavy smashing caused serious damage to the oil sunflower, small disk counts, lower yields, lower oil yields, and severe crop failure.
3, countermeasures:
The varieties with strong disease resistance and scientific farming techniques and seed coating were selected.
Rational fertilization. Oil sunflower requires more potassium, followed by nitrogen, phosphorus is the least required. Phosphorus and potassium fertilizers are indispensable when applying fertilizers. Potassium fertilizers can make plant stems strong and resistant to lodging and increase disease resistance. Muji organic fertilizer 2000-3000kg, potassium sulfate 10-15kg, ternary compound fertilizer 15-20kg.
Implement rotation. Non-cereal cereal crops are also infected with sclerotia, and the rotation effect is poor. For rotation crops, cereals such as corn, wheat, millet, etc. should be selected and a 3- to 5-year rotation should be implemented.
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