The tomato has the characteristics of hi water, large water requirement and strong drought tolerance. The watering features of the practical experience are as follows: 1. Must be watered according to different fertility characteristics Under normal circumstances, the tomato edge planting watering, 3-5 days after planting and then pouring a slow seedling water, until the first spike fruit, such as the size of the egg yolk, and then poured a water. With the growth and development of plants, the number of fruits increased, ventilation increased, transpiration increased, the number and amount of watering should be increased, keep the soil see dry see wet (mainly wet), usually 5-7 days watering Once, the harvest period should keep the soil moist to increase the single fruit weight. 2. Watering according to the water quality Tomatoes in greenhouses cultivated in early spring should be watered in time to meet their water requirements. The wintering tomatoes cultivated in winter-warm greenhouses generally do not need to be watered by pouring enough water to plant the first spike fruit by the end of October. As the weather warms, the amount of watering is increased to meet fruit growth and development. 3. Watering according to plant growth Plants are dark green, glossy leaves, green and flat, heart stretch, is a uniform and appropriate performance of the water. The leaves are not shrinking, the leaves are dark green, and there are mild leafy drooping on sunny days. The over-stretching of the heart leaves, the large and thin leaves, and the fact that the leaves are spewing too much water are manifestations of excess water, and should be controlled by the water-defenders. 4. Day of watering in the greenhouse During the growing season, watering should be done on a sunny day. After the watering, it should be ventilated and drained. It should not be watered in the afternoon, evening and rainy days, otherwise it may cause excessive humidity in the greenhouse. 5. Watering during fruit picking Tomatoes are watered before harvest to increase the fruit's commercial value.
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The virus and related samples in the VTM virus sampling tube should be stored and transported within 48 hours in a refrigerated state (2-8°C). Viruses and related samples can be stored for a long time in -80℃ environment or liquid nitrogen environment. The virus can maintain the activity of the virus in a lower temperature range, reduce the speed of virus decomposition, and improve the positive rate of virus isolation.
The VTM virus sampling tube is generally equipped with a disposable flocking swab. From the appearance point of view, the flocking swab is white and soft. Using this soft brush during the sampling process will make the user feel no foreign body, and it is suitable for different Partial sampling person. Moreover, the flocking swab is designed with a breaking point that conforms to the length of the sampling tube and the natural orifice of the human body, which is not only convenient for sampling but also convenient for transportation of the specimen.
Greenhouse tomato watering technique