Deep ploughing and soil improvement: The soil quality of the new vegetable field is generally poor. The cultivated layer is only about 15 cm, which is changed to vegetable soil. Due to the increase in the number of planting ridges and the consumption of nutrients, the tillage layer should be gradually deepened to improve its physical properties. The deep ploughing time can be arranged when the summer and autumn vegetables leave the garden, each of which is turned twice, so that the tillage layer reaches 25~40 cm.

Adding organic fertilizer: To improve the soil structure, it is necessary to have substances that can stabilize the structure, such as improvers, urban organic waste, and organic fertilizer. The application of organic fertilizer can not only supply the needs of vegetables for nitrogen, phosphorus and potassium, but also promote the formation of soil aggregate structure, improve the ability of water retention and fertilizer retention and increase the buffer capacity of soil. It is the material guarantee for fertilizing new vegetable fields. Great attention should be given.

Planting legume green manure: legume green manure fixes the nitrogen in the atmosphere. After picking the edible part, the straw is returned to the field, especially the fresh stems and leaves such as peas and broad beans are pressed to increase the soil organic matter and nitrogen content.

Reasonable rotation: continuous cropping of vegetables can lead to soil acidification, salinization and disease spread. In the area of ​​grain-changing vegetables, special attention should be paid to rational rotation, using the differences in the absorption of different varieties of vegetables, slowing the excessive consumption of certain nutrients, avoiding or alleviating the above problems, so as to give full play to the production potential of the new vegetable fields. For example, in the rotation, some mustard, peas, etc. can be used to absorb phosphorus and potassium that cannot be used by ordinary vegetables, and 14% to 34% are re-used in the soil in the available state to improve phosphorus and potassium nutrition for the sorghum vegetables. situation. There are many ways to rotate, but one season of legumes should be arranged in the rotation.

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Hip Joint

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.
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.

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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