During the cultivation process, due to adverse environmental conditions, cultivation measures, management methods and other factors, yam caused changes in the internal structure of yam during the growth process, resulting in all kinds of strange shapes, such as the decentralization of the upper end of the yam tubers and the decentralization of the lower end. Snake-shaped, flat-headed, foot-shaped, gourd-shaped, hemp-shaped, etc. These are collectively referred to as deformed yam. Causes (1) Influence of foreign matter in the soil. (2) blind application of fertilizer. When planting yam, vegetable growers applied various kinds of seed fertilizer (ditching the ditch in front of a yam plant after planting a ditch) but due to too much fertilizer application or insufficient soil mixing, the yam plant was planted. At the time of the planting, the seedlings come into contact with the seed fertilizer, and the buds or growth points are burned out, causing tuberculosis, tuberculosis, and other malformations. (3) Unripe organic fertilizer is applied in the yam ditch. (4) Underground pest damage. In the cultivation of yam, there are no pesticides used to control underground pests in the trenches. Underground pests cause damage to the growth of yam tubers during the growth process, such as biting and cutting growth points, so that the yam tubers can not grow normally, resulting in yam deformities. Preventive measures (1) Remove foreign substances in the trench. When artificially digging the mountain ditch, it should be carried out before the winter. Through winter and spring snow erosion and weathering, the soil blocks will be weathered and crushed. With weathering and thawing, the ditch will be filled with gullies, and the ditch will be carefully removed to remove stones and bricks from the soil. Gravel and other hard objects. Do not fill large blocks into the ditch. (2) When planting, operate according to technical regulations, do not apply seed fertilizer in the planting trench, and do not blindly increase the dose when controlling poisonous soil or poison bait for underground pests. (3) Apply adequately cooked organic fertilizer. Such as human excrement, compost, manure and high-quality soil miscellaneous fertilizers, to take advantage of the favorable conditions of high temperatures in the summer and fall seasons, easy to ferment and ripen, and early tanning. Advocate organic fertilizer and some chemical fertilizers to be applied to the yam line after planting Chinese yam, apply the decomposed organic fertilizer to the surface of the yam between the two lines, and plunge about 15 centimeters deep to make the soil and fertilizer fully mixed. , And then cover the soil on the sides of the yam ridge.
Vaccine For Rabies Prophylaxis
Travelers to areas where rabies is endemic may be at risk, especially if they are likely to come in contact with animals in areas where dog or other animal rabies is enzootic and immediate access to appropriate medical care is unlikely. Canine rabies remains highly endemic in certain areas of the world. Need for rabies preexposure vaccination depends on the nature of risk and associated level of potential exposure. preexposure vaccination based on local incidence of rabies in the country to be visited, availability of appropriate agents for rabies postexposure prophylaxis in that country, and intended activity and duration of stay
Vaccine For Rabies Prophylaxis,Rabies Prophylaxis Vaccine,Freeze Rabies Prophylaxis Vaccine,Freeze Vaccine For Rabies Prophylaxis
Changchun Zhuoyi Biological Co., Ltd , https://www1.zhuoyi-bio.com