Sunshade net is another important new agricultural cover material after the greenhouse film and plastic film. It is made by adding vinyl resin and other weathering agents into silk after being stretched. It is light, durable, small in size, soft and easy to put, and saves time and effort compared to traditional covering materials such as straw curtains. It is especially suitable for summer vegetable production and summer and autumn seedlings. In the summer of high temperature and high light, most vegetables cannot grow normally, and the types of vegetables and the market volume are limited. With shading nets covering the shade of the original greenhouse and large, medium and small sheds and other protective facilities, it is possible to produce chillies, spinach, lettuce, and radishes that are difficult to grow in summer. Production must pay attention to the following points: 1 Hi cold vegetables before sowing with low temperature germination treatment, so that the seeds germinate smoothly. 2 The shade net should be black, and the shade effect is good. 3 The height of the cover should not be too low, in order to facilitate field operation and ventilation. 4 Coverage time, covering from 7 to 17 o'clock in sunny days. Other time and cloudy days are not covered with nets to facilitate cooling at night. Late autumn cultivation of cultivated land and wintering cultivation are generally conducted in the summer and autumn. The thunderstorms and windy weather are more severe during this period, which is unfavorable for the development of vegetable seedlings. Shading and covering with shade nets can reduce shading and temperature, and prevent rain from sprouting, which can reduce vegetable pests and diseases. Under normal circumstances, the survival rate of seedlings covered with shade nets is 40%-50% higher than that without coverage. The specific approach is: the direction of the nursery shed to extend the effect of things is good, the shed height of 1 meter, so that each corner of the nursery bed can be protected from the direct light at noon, but also get a short time in the evening "full light" Help Miao Qi Miao. After sowing, the shade net will be directly covered on the seedbed, which will cool and moisturize, and will be covered in a timely manner after emergence. When the temperature is high at 30c, it will be covered at 10am and will be revealed at 4pm; when the temperature is higher than 35c, it will be covered all day and will not be covered on cloudy days. It should be noted that the nets should be straightened, tightened, and flattened, and the concave and convex surfaces cannot be formed. Otherwise, the water in case of heavy rain can easily cause water dripping.
Safflower yellow can significantly inhibit ADP-induced platelet aggregation in rabbits, and also has a very obvious depolymerization effect on ADP-aggregated platelets. When the dosage was 0.22g/ml, the inhibition rate of aggregation and depolymerization reached 85.9% and 78.9% respectively. These effects of safflower yellow were enhanced with the increase of dosage. Safflower yellow has a very significant inhibitory effect on experimental thrombosis in rats, the inhibition rate is 73.4%. Because the thrombus material formed on the silk line is platelet aggregates, the reduction of wet weight of thrombus is obviously the result of drug inhibiting platelet aggregation. It is consistent with in vitro experiments that safflower yellow can inhibit platelet aggregation induced by ADP. Safflower yellow also significantly prolonged plasma recalcification time, prothrombin time and coagulation time in rabbits. It shows that it can affect the coagulation system both in vivo and in vitro. In addition, safflower oil can reduce blood lipid.
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