Carrots are usually planted from mid-July to mid-September, and the high temperature and rainy season during the sowing period are very unfavorable to the emergence of carrots. In addition, the surface of the carrot seeds are hairy and the seeds contain volatile oil, which affects the swelling of the seeds and causes seed germination and seedling retardation. Therefore, carrots tend to grow slowly and have incomplete seedlings after sowing, which has a great impact on yield. Summarizing the experience of planting in various places in recent years and adopting the following technical measures, it is possible to realize complete seedlings, complete seedlings, and high yields for carrots at one time.
Fine-grading carrots like deep loose soil, soil preparation should be deep plowing, depth of not less than 30 cm. To achieve intensive cultivation, the soil is finely crushed, the ground is smooth, and the sensation is good. The whole surface is 2 to 2.5 meters wide to facilitate irrigation and drainage.
The application of basal fertilization and application of basal fertilizer is an important link to ensure high quality and high yield of carrots. In order to prevent the burning of organic fertilizer, prior to fertilization, it is necessary to fully decompose and mashed, combined with site preparation, apply 2500-3000 kg of organic fertilizer per mu, and 50-80 kg of ternary compound fertilizer. In order to prevent the harm of underground pests, appropriate amounts of pesticides in organic fertilizers have a good effect on preservation of seedlings.
Seed treatment first removes the bristles on the dried seeds to facilitate close contact between the seeds and the soil. Seeds soaked in warm water of 40°C for 30 minutes before sowing, then add cool water to make the water temperature drop to 20°C～25°C, soak for 24 hours, make the seeds fully suck enough water and remove and germination. The suitable temperature for germination is 20°C to 25°C, and when more than half of the seeds are exposed, the seeds are sown promptly. Tests have shown that seeds can be sown 2 to 5 days earlier and seedlings 6.4% to 9.6% more.
Chemical weeding carrots are generally used sowing, during the growth, manual weeding is more difficult, and more labor, manual weeding if not timely, will seriously affect the growth of the whole seedlings and seedlings. The timely application of pre-emergent herbicides after sowing of the cover soil not only eliminates a large amount of labor for manual weeding, but also has a good weeding effect. It can use herbicides such as Shi Tianbu or Napropamide which are safe for weed control and have good weed control effect. Herbicide EC 100-150 ml per mu, water 60-80 kg, evenly spraying the ground, control weeds up to 95% the above.
After covering the grass with herbicide, a layer of rice straw with a thickness of 2 to 3 cm is evenly covered on the surface of the crop. This can prevent the soil from being contaminated by the rain and affect the seedlings, and it can also protect the sun and the sun.
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