Carrot three kinds of abnormal prevention
1. The early stage of convulsive carrots hardens the fleshy root and loses food value. The main cause is the low temperature in a certain period after sowing, which causes the plants to twitch early through vernalization. To prevent carrots from convulsing prematurely, it is necessary to use varieties that are resistant to convulsions and to arrange the sowing date reasonably. In addition, lack of water, insufficient supply of nitrogen fertilizers, and serious pests and diseases may cause carrots to twitch prematurely, and water and fertilizer management and pest and disease control must be strengthened during growth.
2. Cracking is mainly due to improper water management. During the swelling of carrot roots, the watering is uneven, the early water supply is insufficient, the fleshy roots grow slowly, and afterwards suddenly a lot of watering or a large amount of precipitation in a short time, the roots absorb water quickly and cause internal cracking. In this regard, carrot root swelling period should pay attention to water management, so that the soil see dry see wet, drip irrigation or sprinkler conditions can be poured before the onset of heavy rain, a small water. In addition, failure to harvest will also cause rooting, and production should be harvested when the roots are 18 to 20 cm long and 3 to 4 cm thick.
3. The main cause of cyanosis is that the cover soil is too shallow. During the process of root enlargement, no attention is paid to soil cultivation, which causes the top of the root of the fleshy root to appear on the soil surface during the middle and later stages of growth, and the chlorophyll turns green when exposed to sunlight. Use small ridges for single-row planting or for ridges and rows of carrots. After removing the mulching film, cover the soil in a timely manner. Do not cover the soil with too much soil and cover the top of the carrot. With the growth of carrots, the roots of the roots of the flesh will be exposed on the ground, and the soil will be covered again three weeks before the harvest. This will prevent the top of the fleshy roots from seeing light and form green heads. It will also allow the formation of blue heads to gradually return to normal after sighting.
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