1, dry seedlings emergence is not neat: the main is bad germination or broadcast dumb valley, the bottom water of the seedbed is not enough, poor temperature control, loose soil cover exposed and so on. In terms of technology, it is necessary to insist on germination and seeding to promote rapid emergence; second, to inject enough water to meet the germination required water, to avoid the phenomenon of "dry buds"; Third, to cover the bud, to prevent dew phenomenon, to ensure that the seeds are not exposed The fourth is the appropriate sowing, rapid filming after sowing, in order to increase seedbed heat, improve insulation effect.
2. The causes of sporadic dead seedlings in seedlings: the choice of seedbeds is unreasonable and the quality of the beds is poor; fertilizers are not uniform or have not been cooked to produce fertilizer damage; long-term coverage of high-temperature burning seedlings; In terms of technology, it is necessary to select the irrigated fields or vegetable lands with strong water retention and fertility as seedbeds, fine soil preparations, and improve the quality of boring machines. Secondly, one month before sowing, sufficient fertilizer should be applied, and the soil should be mixed with mud for multiple times. Unfertilized farmyard fertilizers shall be temporarily used before sowing to avoid burning roots and sprouts, and bad seedlings will be killed. Thirdly, temperature management shall be strictly strengthened according to the regulations, and the relationship between ventilation and temperature control shall be well coordinated to prevent high-temperature burning of seedlings; In the bed soil disinfection and seedlings in the 1.5-2.5 leaf blight at the onset of control of water, once found blight, must immediately spray 500 times the "enexone" for prevention and treatment.
2. The causes of sporadic dead seedlings in seedlings: the choice of seedbeds is unreasonable and the quality of the beds is poor; fertilizers are not uniform or have not been cooked to produce fertilizer damage; long-term coverage of high-temperature burning seedlings; In terms of technology, it is necessary to select the irrigated fields or vegetable lands with strong water retention and fertility as seedbeds, fine soil preparations, and improve the quality of boring machines. Secondly, one month before sowing, sufficient fertilizer should be applied, and the soil should be mixed with mud for multiple times. Unfertilized farmyard fertilizers shall be temporarily used before sowing to avoid burning roots and sprouts, and bad seedlings will be killed. Thirdly, temperature management shall be strictly strengthened according to the regulations, and the relationship between ventilation and temperature control shall be well coordinated to prevent high-temperature burning of seedlings; In the bed soil disinfection and seedlings in the 1.5-2.5 leaf blight at the onset of control of water, once found blight, must immediately spray 500 times the "enexone" for prevention and treatment.
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