How to do the rice soil testing and formula fertilization? Soil testing and formula fertilization not only helps farmers to use fertilizers rationally, but also saves money and has a multiplier effect. It also greatly contributes to protecting the soil environment and ecological balance. Rice soil testing and formula fertilization is the use of soil testing and formula fertilization meter to carry out basic analysis of soil nutrients, and then determine the use of fertilizer types, quantity, collocation, time waiting. It includes fertilization type, fertilization time, fertilization amount, fertilization method, and nutrient ratio. If any of these technologies cannot be implemented correctly, it will lead to a reduction in the economic benefits of fertilization. The following issues should be noted in the formula fertilization of rice. 1 At the same time as the formula fertilization of rice, combined with the application of organic fertilizer Formula fertilization for rice generally refers to the application of chemical fertilizers, especially nitrogen, phosphorus, and potassium fertilizers. Therefore, formula fertilization must not be used as the only fertilization method for rice production. The nutrients needed for rice growth are various and there are a large number of elements. There are also trace elements in the medium-quantity element. In addition to the nutrients provided by formula fertilization, other nutrients have to be obtained by organic fertilizer or other fertilization methods. While formula fertilization, combined with the application of organic fertilizer, in the release of nitrogen, phosphorus, potassium and other nutrients, some trace elements are also dependent on the decomposition of organic matter released; second, organic fertilizer can improve the soil structure and solve the water and air in the soil The contradiction between them will increase the utilization rate of fertilizers. Third, organic fertilizers provide the carbon source needed for the propagation of soil microorganisms and create a soil environment that is suitable for the exuberant activity of microorganisms, thus ensuring the sustainable high yield and stable production of rice. 2 Application of formula fertilization should be combined with growth and uptake of rice When formulating fertilization according to the rice yield target and soil nutrient status, it is necessary to pay attention to the application according to the absorption characteristics of each rice growth. During the entire growth process of rice, the general trend of the demand and absorption of nitrogen, phosphorus, and potassium is less in the early and late stages of growth, and more in the middle stage. In formula fertilization, special attention should be paid to the application of the critical period (seedling period) and maximum efficiency period (elongation period) of rice nutrition. 3 Combination of formula fertilization and cultivation management Rice cultivation and management measures directly affect the absorption and utilization of fertilizers. First, suitable water conditions will increase the utilization rate of fertilizers. The lack of water and excess water will seriously affect the absorption and utilization of fertilizers. Second, management measures will have many impacts. Corresponding soil cultivation will reduce the loss of nitrogenous volatiles. Concentrated application of phosphate fertilizer can effectively reduce the amount of phosphate fertilizer fixed by the soil and increase crop absorption and utilization. Therefore, fertilization and field management must be combined. The above fertilization methods are for reference only. In actual production, due to the long growth cycle of rice, soil fertility and planting levels are different, so fertilization techniques and methods will be different. In short, as long as we seriously according to the law of rice growth, due to soil When fertilizing, it will achieve a good yield increase. Bakelite Injection Molding Machine Bakelite, also known as bakelite, also known as phenolic molding, is a thermosetting plastic with high impact toughness, stable quality, corrosion resistance, heat resistance and low temperature. Generally speaking, the process of Dewei forging bakelite Injection Molding Machine brand is divided into the following processes. You can have a look together to better understand the knowledge of bakelite injection molding. Bakelite Injection Molding Machine,Bakelite Injection Molding Machine ,Bakelite Injection Moulding,Automatic Bakelite Moulding Machine Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachine.com
1. Bakelite mold heating
Unlike Plastic Mold, bakelite mold can be produced after being put on the machine. It takes a long time to heat up bakelite mold.
2. Temperature rise of bakelite injection molding material
The customized material of bakelite injection molding machine is generally powder. Under the friction formed by the barrel heating device and the screw, the thermosetting plastic in the barrel is melted by heat to achieve the effect of pre-setting plastic material.
3. Injection molding of bakelite products
After the completion of pre-molding, the mold closes, the screw rod starts to inject, and the molten material is pushed by the screw from the barrel nozzle through the main channel, the diversion channel and the gate of the mold into the mold core, and the mold core is fully filled. Because the melted material is cut and heated during injection molding and the mold is at high temperature, the temperature of the melted material rises rapidly into a fast response situation. The injection time of bakelite products is different from that of plastic products, and the injection time of bakelite products is relatively long.
4. Dry and solid under pressure
After injection, it will enter the pressure maintaining state immediately. The effect of pressure maintaining has two aspects: one is shrinkage, and the other is to ensure that the product structure produced by the bakelite injection molding machine manufacturer can be close and firm. After the completion of pressure maintaining, it will be delayed for a period of time, waiting for the material to be completely dry and solid, and then the product will be finalized.
5. Ejection of bakelite products
Open the mold to eject the finished product, clean the mold, and wait for the next the first mock examination product to go out.