Recently, the author discovered during the process of changing the shed that there are many problems with various kinds of vegetables in the shed. A large crop of eggplant leaves are yellowing, tomatoes are slow to puff the fruit, can't stand the fruit, and there are many deformed peppers, etc. Vegetable farmers are very confused about it. This is mainly due to the fact that the weather is suddenly warm and cold, sandy and dusty weather occurs frequently, the temperature fluctuates up and down, and the root growth, nutrient absorption, and flower bud differentiation of vegetables are affected. So, what issues should vegetable farmers pay attention to in daily management? Increase light and increase yield Spring is the frequent period of sand and dust weather. In spring, the shed film is easy to be covered with sand and dust, and the light transmittance of the shed film decreases, which causes the shed temperature to rise slowly, the photosynthetic accumulation of leaves decreases, and the color change of solanaceous fruits is affected. It is recommended that vegetable farmers should wipe the shed film frequently to increase the transmittance of the shed film, so that even if it is overcast, it can diffuse light to increase the light in the shed and promote high yield. Timely removal of diseased and old leaves can also increase the light, reduce the mutual shade of the leaves, increase the photosynthetic area of ​​the leaves, and promote the accumulation of organic matter. At the same time, it can increase the ventilation and light transmission in the shed and reduce the probability of disease. Controlling temperature and coordinating growth The physiological activities of vegetable growth and development must be carried out under certain temperature conditions, so the temperature management of the shed should focus on three points. First of all, adjust the temperature of the shed to a suitable temperature for the growth of vegetables, at least to ensure that the temperature in the shed is maintained within the range of the lowest temperature and the highest temperature that the vegetables can withstand, so that the vegetables can grow normally. Second, control the temperature difference between day and night. The suitable temperature difference between day and night is 10℃-15℃, which can not only prevent vigorous growth, promote plant growth and robustness, optimize flower bud differentiation, but also effectively reduce the occurrence of virus diseases. The temperature in a vegetable farmer's shed in Gucheng Street, Shouguang City, Shandong Province is above 30°C during the day and 8-9°C at night when the temperature is the lowest. Tomatoes grow weakly and can't hold flowers. The main reason is that the temperature in the shed is changed too much due to the delay of heat preservation and improper ventilation, which affects the absorption of nutrients by the root system, resulting in insufficient nutrient supply. Finally, the temperature required for vegetables in different growth stages is different, and temperature should be adjusted according to their biological characteristics. For example, the temperature should be lowered in the cucumber seedling stage to prevent growth, and the high temperature can be used to raise the melon in the fruiting stage. Reasonable supply of water and fertilizer to promote strong roots Watering depends on the weather conditions. Avoid watering on cloudy days or continuous cloudy days after watering, resulting in a drop in ground temperature, causing vegetable roots and even dead trees, or increasing air humidity in the shed, leading to the occurrence and spread of diseases. Vegetable farmers should choose to water in the morning on a sunny day, and there will be continuous sunny days after watering; it is recommended to irrigate furrows and ridges, and flood irrigation is not allowed to avoid lowering the ground temperature to affect root growth and nutrient absorption. Do not blindly use fully water-soluble fertilizers when flushing fertilizers, and should be used together with root care products. This fertilization can not only supplement a large amount of nutrients, but also stimulate the growth of plant roots, so as to achieve the purpose of rooting, growing and strengthening roots, and prevent dead trees and rotten roots from occurring. Early disease prevention To reduce the humidity of the air in the shed and inhibit the occurrence of diseases, the commonly used methods of dehumidification include heating and dehumidification, ventilation and dehumidification, covering with mulch, laying rice husks, and pouring small water under the mulch. Reduce the source of bacteria, remove diseased leaves, fruits, and branches in time, bring them out of the shed and bury them in a concentrated way to reduce the source of bacteria in the shed. At the same time, combined with spraying prevention to inhibit the occurrence and reproduction of pathogens, vegetable farmers can spray chlorothalonil mixed with Zhongshengmycin throughout the shed, which has a good disease prevention effect. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
In hip joint replacement surgery, can be broadly divided into two kinds,cemented artificial hip and cementless artificial hip, due to the selection of different materials, the price is also very different.
Total cementless hip system indications
1.The main purpose of total hip replacement is to relieve hip pain,and the second is to improve hip function. The main indication for total hip arthroplasty is hip pain caused by hip lesion over 60 years old,which can not be used for other operations but only for head and neck resection.
2.Replacement surgery may be considered in patients over 45 years of age with subluxation of the hip,traumatic arthritis, pain, or loss of function.Due to the insufficient depth of the acetabulum,the upper margin of the acetabulum is inclined, which affects the stability of the acetabulum cup,and the acetabulum should be deepened or covered.
3.Indications of the need for replacement include hip pain due to loosening of the prosthesis,stem fracture,prosthesis dislocation, manual reduction failure,central dislocation caused by acetabulum wear caused by prosthesis and pain.
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Generally , the cemented type is suitable for osteoporosis, poor bone conditions, 65 to 70 years of age and older patients. The use of bone cement for artificial hip joints allows for early mobility, which is also suitable for older patients. In addition, elderly patients are generally less active, artificial joint wear is also light, replacement of an artificial joint can be, generally need less revision. The price of bone cement type artificial joint is low.
Cementless type is also known as biological fixation type, suitable for young and middle-aged patients with good bone conditions, such artificial joints have micropores or biological coating materials on the surface, bone can grow into it to achieve the role of fixing artificial joints, so it is often called biological fixation type. Cementless artificial hip joints allow their bones to slowly grow together with the artificial joint to achieve a fixed role.