In the process of raising seedlings in the autumn and winter sheds, if the environmental conditions can not keep up or the management is improper, the seedlings often have various abnormal growth phenomena. Yang Zhongan, a professor of the Agricultural College of the Northwest A&F University and a vegetable expert, proposed to scientifically manage different problems. .
Beware of unearthing with skin to prevent the soil from being unearthed. When planting, it should be evenly covered to ensure proper soil temperature after sowing. In addition, when the seedlings are just unearthed, if the bed soil is too dry, a small amount of water can be sprayed to keep the bed soil moist, and it is found that there is a place where the soil is too thin, and a layer of moist fine soil can be added. It was found that there were seedlings with skin excavation, which could be sprayed with water to soften the seed coat and then manually remove the seed coat.
Reducing rotten seedlings and seedlings is related to seed quality. Seeds are immature, moldy during storage, and scald during soaking can cause rotten seeds; in addition, low temperature and high humidity after sowing, application of unfertilized organic fertilizer, and excessive time for seed excavation, It is also prone to rotten species under long-term anoxic conditions. The above conditions should be taken to control the nursery environment and reduce rotten seedlings.
Avoid roots and roots are mainly due to the long-term soil temperature of the seedbed is below 12 degrees, combined with excessive watering or cloudy days, insufficient light, resulting in seedling roots in low temperature, excessive humidity, hypoxia, dysplasia, causing roots . The soil temperature should be raised (the soil temperature should be kept above 16 degrees as much as possible), and the bottom water should be used once at the time of sowing. The water should be properly controlled during the emergence process to prevent the bed surface from being too wet.
The control of the long stems is long, thin, with less roots, less stress resistance, slower seedlings after planting, and less prone to early maturity and high yield. Insufficient illumination, high night temperature, excessive water and nitrogen fertilizer can easily cause seedlings to grow. It can be prevented by increasing lighting, maintaining proper temperature difference between day and night, moderate water supply, and timely seedlings.
Prevent aging and aging seedlings from growing slowly after planting, the flowering result is late, the result period is short, and premature aging is easy. The cause of aging seedlings is caused by long-term lack of water or low temperature of the seedbed, improper handling of hormones, etc., and care should be taken to prevent prolonged temperature from being too low, excessive water shortage and unscientific use of hormones.
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