In the production of vegetables, it is necessary to insist on balanced fertilization, soil testing, formula fertilization, and fertilizer application. It is advisable to implement recommended fertilization, develop organic compound fertilizers, prevent excessive partial application of nitrogen fertilizers, and strictly enforce safety intervals of nitrogen fertilizer application. The use of organic fertilizers and other toxic fertilizers that are not harmlessly treated is prohibited. Low nitrogen fertilizer utilization is a prominent problem that hampers agricultural production. In order to reduce the loss of effective components of fertilizers and increase their economic benefits, scientists and technicians in the agricultural and agricultural sectors have been conducting research, exploration and experimentation. According to tests, when the temperature is 29°C and the soil moisture content is 13.6%, ammonium bicarbonate is applied to the surface, and after 12 hours volatilization loses 5.49%; while the same fertilizer is applied deeper to the soil below 6 cm, volatilization loss occurs after 12 hours. Only 0.3%. It can be seen that deep application of chemical fertilizers can increase the utilization efficiency of fertilizers. In addition, agro-logical measures that use chemical fertilizers combined with nitrogen-fixing agents or other fertilizers can significantly increase the effectiveness of fertilizer efficiency. 1. Fertilizer mixed application (1) Ammonium bicarbonate additive Chemical additive Ammonium bicarbonate additive is added to ammonium bicarbonate in proportion to the application, which can effectively inhibit the decomposition and volatilization of nitrogen, so that the utilization efficiency of ammonium bicarbonate can be improved by 3 - 4 times. (2) Incorporation of nitrogen-fixing agent The proportion of nitrogen-fixing agent is incorporated into the deep application of nitrogen fertilizer, and the nitrogen-fixing amount can be increased by 1.5-2.0 times, and the utilization rate of nitrogen can be increased by 10-30%. (3) Mixed application of urea and borax The application of urea and borax in the proportion of (400-500):1 can significantly reduce the volatilization loss of ammonia, increase the nitrogen utilization rate, and can effectively prevent the wheat grain from filling and the rape flower from being effectively prevented. It is not true that cotton buds do not take place. (4) Applying urea and oxalic acid to apply basic fertilizer to cotton, such as applying nitrogen fertilizer 200, phosphate fertilizer 140, potassium fertilizer 40, and oxalic acid 5, can increase the number of ammoniated bacteria by 4.6 times, nitrogen utilization rate by 17.3%, and nitrogen. Loss rate decreased by 25%. 2. Deep application of chemical fertilizers (1) Deep application of basic fertilizer The fertilizer application device shall be installed on the plow frame. When the tractor is cultivated, the fertilizer will be applied to the tillage layer along with the ploughshare. (2) Deeply applying the seed fertilizer while sowing The fertilizer application device and the seeding device are installed in the same machine, and the fertilizer is applied deep below or below the seed while sowing. To ensure that there is a 3-5 cm soil isolation layer between the seed fertilizers, to prevent seed and fertilizer mixed damage seed. (3) Apply topdressing deep in the growth process of crops use chemical fertilizer top dressing device or add topdressing device to cultivator soil cultivating machinery to complete multiple processes such as ditching, loose soil, row fertilizer and soil covering, and apply nitrogen fertilizer deep into the roots of crops. .
Disposable Piercing Guide - WPTC5
A Disposable Laparoscopic Trocar is a medical device used in minimally invasive surgery to create a small incision in the abdominal wall for the insertion of surgical instruments and a camera. It consists of a sharp, pointed tip that is inserted through the skin and into the abdominal cavity, and a sleeve that provides a pathway for the surgical instruments. Once the trocar is inserted, the sleeve is locked in place and the instruments can be inserted and removed through it. Disposable laparoscopic trocars are designed for single-use only to prevent the risk of infection and cross-contamination. They are available in different sizes and shapes to accommodate various surgical procedures.
Disposable Use Puncture Guider,All Laparoscopic Instruments,Keyhole Surgery Instruments,Surgical Laparoscopic Machine
Changzhou Weipu Medical Devices Co., Ltd. , https://www.wmlaparoscopic.com