First, vegetables
1. Principle of fertilization: mainly organic fertilizer, supplemented with other fertilizers, mainly multi-component fertilizers, supplemented by single element fertilizers;
Mainly to Shiji Fei, supplemented by topdressing.
2. Basal fertilizer: Basal fertilizer refers to the fertilizer applied to the field before or after the planting of vegetables. Basal fertilizers should be dominated by organic fertilizers and mixed with appropriate amounts of chemical fertilizers. When establishing the variety and quantity of basal fertilizer, the following points must be taken care of: 1 to prevent obstacles in fertilizer concentration; 2) nitrogen fertilizers for base fertilizers mostly use nitrate nitrogen and use less ammonia nitrogen; 3) nitrogen fertilizers supply 70% of the nitrogen content of crops For basal fertilizer, 30% for top dressing; 4 Phosphate fertilizer should be all as base fertilizer. Phosphorus uptake by vegetables is 100% when nitrogen is 100. Phosphorus should not be too high for 5 base fertilizers. Under normal circumstances, the amount of potash applied is 0.8-1.4 times that of vegetable crops.
3. Top dressing: Top dressing refers to the addition of fertilizer after sowing or after planting. Top dressing should be top-dressed in appropriate amount according to different vegetables and growth periods to meet the needs of various growth stages of vegetables.
The focus of various vegetable dressings is as follows: 1 vegetable, with emphasis on root or stem enlargement. 2 Long-growing green leafy vegetables such as Chinese cabbage, Chinese cabbage, and Chinese color, etc. The top dressing is mainly at the beginning of the ball or the beginning of the flower bulb (cauliflower). 3 Melons, Solanaceae, Beans, Top dressing focuses on the result of the first female flower (èš).
4, outside the root dressing: refers to the vegetable leaf surface, with spray fertilizer solution or fertilizer powder method, so that vegetables through the leaves for nutrient absorption. The top-dressing fertilizer is suitable for fertilizers that are easily fixed and leached by the soil and when the soil is too wet in long-term spring rains. The concentration of the fertilizer solution used for top dressing is different from that of crops and external conditions, and is generally between one thousandth and one percent.
In hot die forging press, the automatic line for host is active the development direction of forging crankshaft production, the production line will be widely used precision shearing blanking, forging (cross wedge rolling) blocking, medium frequency induction heating, finish hydraulic press and other advanced technology, and equipped with robots, conveyor belt,back mold device of the turntable in auxiliaries, such as formation of flexible manufacturing system (FMS).
Through FMS, the work piece and mold can be replaced automatically and parameters can be adjusted automatically.Display and record the data of the thickness and maximum pressure of the Forging Parts and compare it with the fixed value. Select the optimal deformation amount to obtain the quality products.The whole system is monitored by the central control room to realize unmanned operation.The crankshaft forged by this forging method has the full fiber property of internal metal streamline and can increase the fatigue strength by more than 20%.
Forging Parts
Forging Parts,Forged Components,Forging Casting Parts,Machinery Forged Parts
YaoPeng Metal Products Co., Ltd. , https://www.ypmfg.com