Patio tomato management points
1. Temperature management: The tomato seedlings are not ventilated within 1 week after colonization, and are mainly based on heat preservation and promote seedling regeneration. When the temperature in the booth exceeds 30°C, ventilate immediately. After the seedlings, keep 25°C to 28°C during the day and 15°C during the night. At noon on sunny days, ventilate between the two waists in the greenhouse to avoid overheating in the shed and remove the film in early May.
2. Fertilizer and water management: The amount of nitrogen fertilizer should be properly controlled. Beware of leggy, generally top dressing 3 times to 4 times. For tomatoes that do not cover the mulch, the fertilizer is applied directly to the husk; the tomato that covers the mulch must be deep-opened. Top dressing time: for the first time in the first stage of fruit enlargement period, Mushi compound fertilizer 10 kg or urea 5 kg, superphosphate 25 kg, and Qinggou soil; the second time in the 2nd to 3rd fruit expansion period, mu 30 kg of compound fertilizer is applied; for the third time, fruits of 4 to 5 stalls are inflated, and 3 kg to 5 kg of compound fertilizer is applied. If the tomatoes have more fruit and there is a phenomenon of de-fertilization, it is necessary to increase the frequency and dosage of topdressing. Irrigation time and quantity can be determined according to soil moisture and plant growth conditions in the shed. Usually, watering or irrigation is performed every 7 days to 10 days. The amount of water is appropriately increased in the fruit period, and gully irrigation is the main form of the cover film. In addition, pay attention to drainage after the rain to prevent damage.
3. Pruning topping: Infinity growth tomato can be culminated with a culm or double culms; a limited growth tomato can retain one lateral branch under the first inflorescence, the lateral branches drawn below the lateral branch should be removed, and the main branch must be timely Adjust and do not remove the effective side branches. From the end of May to the beginning of June, according to the growth of the plant, the leaves were picked up after leaving 2 leaves on the final inflorescence.
4. Flower preservation: Due to the low temperature in the early days, tomatoes are not easy to produce. Hormone should be used to ensure the fruit setting rate of the first flower and increase the early yield. Flowering uses 15ppm to 25ppm of 2,4-D flower, liquid color to facilitate the difference, anti-compound, reduce cracking. In the middle and late April, the number of flowers increased greatly, and the temperature increased, and 30 ppm to 40 ppm of anti-dropping agents could be sprayed to increase the fruit setting rate.
5. Precocious redness: When the early tomato fruit grows full-grown and is fried in beige, redness is promoted on the plant, and the fruit surface is spread with an ethephon concentration of 3000 ppm to 4000 ppm, which can be listed 5 days to 7 days earlier.
6. Pest control: common tomato diseases include early blight, late blight, leaf mold, viral disease, and bacterial wilt. For early blight, late blight and leafy mildew, 75% chlorothalonil 600 to 800 times, or 80% dexamethasone 700 to 800 times, can be sprayed; 20% virus A or 15% can be sprayed in the early stage of viral disease. Virus 500 times liquid 2 times to 3 times; bacterial wilt can be used 100ppm to 200ppm agricultural streptomycin control. The above liquid requirements are sprayed once every 7 days to 10 days after the colonization of tomato plants, and sprayed 3 times to 4 times. After onset, the sprays are sprayed 2 to 3 times. At the same time, rotation was carried out to timely remove diseased plants, remove diseased leaves and diseased fruits, strengthen management of fertilizers, ventilation and light transmission, reduce the humidity in the field, and enhance plant resistance to diseases. The common tomato pests are locusts and bollworms, and field investigations must be conducted in a timely manner to prevent and control spraying. Aphid was found to be sprayed with 25% chrysanthemum ester 1500 times or 20% imidacloprid 2500 times. The bollworm was found to be sprayed with 50% phoxim 1000-1500 times.
7. Timely harvesting: Mature tomatoes should be harvested in batches in time to reduce the burden on the plants, ensure fruit quality, promote fruit enlargement in the later period, and increase yield. After the tomatoes fail, they should clear the garden in time to destroy the dead leaves to reduce the residual disease in the field and ensure the safety of the jaws.
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