At present, it is the growing season of eggplant and melon vegetables. In the conditions of continuous rain and continuous low-temperature weather, the seedlings of fruits and vegetables are faced with the following problems: The seedlings that have been sown are too large, and the phenomenon of squeezing seedlings occurs. It is easy to induce diseases; the seedlings planted before the Spring Festival are still small. Under the conditions of insufficient temperature, low temperature difference between day and night, and high humidity, the seedlings grow slowly, prone to rotten seedlings, and high seedlings. In the case of continuous rainy days, different seedlings should adopt different management measures. The following suggestions are recommended for the farmers in the management of nursery.
For older seedlings, especially tomato seedlings, planting facilities such as greenhouses can be prepared for planting; for those who are not ready for planting, nursery containers such as mobile nutrients and trays should be used to properly remove roots. , Inhibit the growth of seedlings, at the same time, dilute nutrients and pits, increase the growth space of seedlings, prohibit watering, and remove other coverings in the greenhouse as much as possible during the day to increase light and reduce humidity. You can select leewards before and after noon on cloudy days. Ventilate the greenhouse for a short time to reduce the humidity of the greenhouse; strengthen the drainage of the trench outside the greenhouse, and forbid water from the nursery shed.
For seedlings that are sown soon and the plants are still small, especially melons and eggplant seedlings, the most important work under continuous low temperature and rainy weather is to increase (supplement) the light and reduce the humidity of the seedbed as far as possible, on the premise that the seedlings are not affected by cold damage. The specific measures are: as early as possible in the nursery greenhouse or greenhouse in the shed and shed to cover the late cover, according to 1.0-1.5 square meters with 1.0-1.5 square meters with 1 ç›60-100 watt incandescent light (light bulb distance from the top of the seedling not less than 40 cm) , Conditional use of plant fill light can fill light; forbid seedbed watering, in cloudy and no rain conditions can be selected before and after noon lee at short time ventilation on the greenhouse to reduce the greenhouse humidity; when the seedbed humidity is high It is possible to use measures such as spreading fine soil, drying seedling substrate, and spreading seedlings around the seedbed to reduce the humidity of the seedbed; at the same time, strict drainage work around the shed to reduce the groundwater level. In addition, during the day, the warming line is turned on to increase the soil temperature of the seedbed and increase the temperature difference between day and night, and it is also conducive to the use of limited light to improve the photosynthesis capacity of the seedlings; at night, in order to ensure that the seedlings are not affected by chilling, the ground heating line is turned off. Or adjust the temperature of the temperature controller to about 10°C to avoid relatively high night temperature in the seedbed.
Portable Color Doppler Ultrasound Machine
Portable Color Doppler Ultrasound Machine,Obstetric Color Ultrasound,Prostate Color Ultrasound,Obstetrical Examination Instrument
Mianyang United Ultrasound Electronics Co., Ltd , https://www.uniultrasonic.com