High temperature season nursery must overcome the adverse effects of the weather in order to cultivate a good seedlings, should pay attention to the following four points.
First, pay attention to high temperature hazards. At high temperatures, such as lettuce and celery sprouting difficulties, the seeds can be soaked for 8 hours, with wet gauze wrapped in the well or in a cold place to germination, or low temperature treatment, celery 2 °C - 5 °C 48 hours, lettuce 5 °C 72 Hours, can promote germination, increase germination rate, can also be sprinkled in the seedbeds, some short straw or straw, or cover the seedbed with a shade net, can also take shade shelters, cover the old film, bamboo curtains and so on.
Second, pay attention to anti-rainstorm hazards. In summer, heavy rain makes the soil harden, which is not conducive to seed germination and unearthed. The following measures should be taken. First, choose high-drying soil to build seedbeds; Second, select the sandy loam seedlings for the places that are prone to heavy rain; Third, the drainage around the seedbeds should be smooth; Fourth, after sowing In the event of heavy rain, the seeds will not be unearthed. After the rain, the seedlings will be ploughed in shallow beds to prevent the formation of earthwork knots.
Third, pay attention to drought hazards. The following measures should be taken: seeding the seedbed with water after planting; or fully watering, then soil preparation, planting, sowing after covering with soil; in the morning or evening, watering the seedbed; sowing seeds, sowing Nursery, the first hole after sowing is not covered with soil, in the second hole, the wet soil dug out from the first hole as the cover.
Fourth, pay attention to guardian seedlings. High temperature season seedlings, vulnerable to prostitution, to take the following measures to prevent: morning and evening with a watering can, timely seedlings or seedlings; such as cucumbers, tomatoes can be sprayed with ethephon to control seedlings leggy, tomatoes in the 5 leaf, 7 leaf period with 40% - 50% chlorcholine 1000 times each spray 1, can make seedlings thick, dark green leaves, after the increase of leaves, promote flower bud differentiation.
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