First, soil management 1. Qingyuan deep turn. After the fruit is harvested in autumn, the leaves are turned yellow until the leaves are cleared before the deep turning. During this period, the temperature is higher, and the second peak of root growth occurs. The roots of the roots are easily healed and new roots are generated. Soil nutrient conversion is faster, which is beneficial to the tree body. Accumulation of nutrients. 2. Fertilization. In combination with soil deep turning, the basal fertilizer is applied, and the basal fertilizer is mainly organic fertilizer. According to walnut yield, site conditions, tree nutrients fertilization. Generally, 5 kg of organic fertilizer is applied to 1 kg of walnuts for production, and an appropriate amount of phosphorus and potassium fertilizer is mixed. Saplings 20-30 kilograms per plant, 30-50 kilograms per tree at the beginning, and 50-80 kilograms per tree at fruitage. At the same time with the application of 2 to 5 kg of superphosphate. The amount of basal fertilizer accounted for more than 30% of the annual fertilization amount. 3. Watering. The combination of deep-turning and basal fertilizer should be immediately watered, not only conducive to soil conservation, and can promote the decomposition of base fertilizers, increase nutrient reserves of trees, improve the ability of young trees overwintering, but also conducive to early spring budding and flowering. Where conditions permit, pour frozen water before freezing. Second, pruning and updating rejuvenation 1. Trim time. After the fruit is harvested in the autumn and before the leaves are yellowed, it cannot be trimmed one month after the defoliation and before the budding. These two periods are the peaks of the wound flow. 2. Walnut tree shape. A reasonable tree shape is the basis of high yield. The natural happy shape is mostly used for small and medium crowns and early solid planting gardens; the trunk sparse layer shapes are mostly used for sparsely planted trees, scattered trees, and intercropping trees. 3. Trim. Pruning at this stage will reduce the leaf area and affect the nutrient accumulation of the tree body. At this time, the tree body is free from injurious flow and is suitable for adjusting the skeleton structure of the tree, mainly pruning large branches, eliminating dense branches, pests and branches, and shading branches. Behind the branches, retracting drooping branches. Other prunings should wait until the second year before budding. 4. The renewal and rejuvenation of aging trees. After the walnut enters the aging period, peripheral branches grow weaker, droop, and large and middle branches die. At this time, if the rejuvenation is updated in time, the result can be extended. Update the big update, medium update, and small update. The big update is also called the trunk update, which means that the tree trunk with a taller trunk and a weaker tree is sawn from the appropriate part of the trunk; the medium update is also called the trunk update, which means that the appropriate part of the main branch is sawn off; the small update is also Call the collateral update, that is, retract the collateral. The rejuvenation should be based on the tree potential, and there should be more post-updates. Third, pest and disease control The pests and diseases of walnuts are relatively few, but they must also be effectively controlled in a timely manner. Based on the principle of “prevention as the mainstay and comprehensive prevention and controlâ€, the prevention and control of specific pests and diseases in the walnut gardens should be conducted in a timely manner.
Rabies Vaccine (Vero Cell) for Human Use
The first company develops and employs the technology of microcarrier bioreactor for production of Rabies Vaccine (Vero Cell) for Human Use in China. The culturing process has good repeatability, the product shows reliable quality and in reasonable stability and has the comparable effect with lyophilized formulation.
Rabies Vaccine For Human Use,Used To Prevent Rabies,Against Rabies Virus Changchun BCHT Biotechnology Co.,Ltd , https://www.ccbcht.net
