In the process of raising seedlings in greenhouses, if the environmental conditions cannot keep up with or are improperly managed, the seedlings often exhibit various abnormal growth phenomena. The experts proposed that scientific management should be conducted for different situations.
Beware of skin unearthed in order to prevent skinned soil, sodding should be uniform when sowing, to ensure proper soil temperature after sowing. In addition, when the seedlings have just been excavated, 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 layer of moist fine soil where the soil is too thin. Found that seedlings unearthed with skin, can first spray water to make the seed coat become soft, and then manually remove the seed coat.
Reducing rotting seedlings is related to seed quality. Immature seeds, mildew during storage, and scald during soaking can all cause bad seeds. In addition, low temperature and high humidity after sowing, application of unripe organic fertilizer, and seed unearthing are too long. Long-term exposure to hypoxic conditions is also prone to rotten species. The above conditions should be controlled to control the nursery environment and reduce rotten seedlings.
The main reason for avoiding stubble rooting is that the soil temperature of the seedbed is below 12°C for a long time, combined with excessive watering or occasional cloudy days, and the lack of light causes the seedling root system to be stunted at low temperature, over-humidity and anoxic conditions. . The soil temperature should be raised (the soil temperature should be maintained at 16°C or more), and the sole water should be used at the time of sowing, and the water should be properly controlled during the seedling process to prevent the bed surface from being too wet.
The appetite and leggy growers have long, thin stems, weak fibrous roots, poor resistance, and slow seedlings after planting, making it difficult to obtain early maturing and high yields. Inadequate lighting, excessive nighttime temperatures, excessive water and nitrogen fertilizers, and the like can easily lead to leggy seedlings, and can be prevented by increasing lighting, maintaining appropriate temperature differentials between day and night, moderate water supply, and timely seedlings and other management measures.
To prevent aging and aging seedlings from growing slowly after planting, the flowering results are late, the result is short, and premature aging is easy. The reason for the aging seedlings is caused by long-term water shortage or low temperature of the seedbed and inappropriate hormone treatment. When growing seedlings, care should be taken to prevent prolonged low temperature, excessive water shortage, and unscientific use of hormones.
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