3. When sowing, water or manure should be poured first, then sowing and covering the soil, so that the seedlings will have more capacity.
3. When sowing, first dress the seeds with new high-fat film, and then sow 5-7 seeds in each nest. After sowing, cover the soil with a thickness of about 2 cm, which should not be too thick. At the same time, spraying 800 times solution of new high-fat film can protect moisture and prevent evaporation, prevent sun and drought, keep warm and prevent freezing, prevent soil hardening, suffocate and isolate pests and diseases, so as to improve the emergence rate.
4. When the carrot seedlings emerge, it is necessary to interplant in time (i.e. even seedlings), so as to avoid crowded seedlings or poor lighting, but we must master the principle of interplanting seedlings early and fixing seedlings late. Generally, when plants have 1-2 leaves, they can be homogenized once, leaving 3 plants in each nest; When there are 3-4 leaves, the seedlings are evenly distributed for the second time; Seedlings should be established when there are 5-6 leaves, and 1 plant should be left in each nest. ?
5. Spraying a new high-fat film after transplanting seedlings can effectively prevent the above-ground water from evaporating, plant diseases and insect pests, shorten the slow seedling stage, quickly adapt to the new environment and grow healthily.
How to fertilize?
1, base fertilizer and organic fertilizer are applied once as base fertilizer, and in addition, 5-6kg of urea, 5-7kg of diammonium phosphate13-17kg of potassium sulfate are applied per mu.
2. Topdressing. Urea 1 1- 13 kg and potassium sulfate 8-9 kg were applied per mu in the early stage of fleshy root swelling; 9- 10 kg of urea and 5-6 kg of potassium sulfate were applied in the middle stage of fleshy root swelling.
3. Spraying 0.3% calcium nitrate and 0.2% boric acid on leaves in the middle and late growth stage of topdressing outside roots for 2-3 times to prevent calcium and boron deficiency; Spraying 0.2% potassium dihydrogen phosphate on leaves can improve yield and quality.