Nitrogen is one of the main factors limiting the productivity of various ecosystems. Soil organic nitrogen must be transformed into inorganic nitrogen (mainly ammonium nitrogen and nitrate nitrogen) that can be absorbed and utilized by plants through the action of soil microorganisms. This process is called nitrogen mineralization. The desalination ability directly reflects the nitrogen supply capacity of the soil and directly affects the amount of nitrogen fertilizer applied. Nitriding capacity is mainly related to the temperature and humidity in the soil. In 1972, Stanford and Smith published a classic article stating that In the temperature range (-4~40Â°C), the nitrogen mineralization rate increases as the temperature increases. In this paper, the research on this point is carried out. The detection and control of the soil moisture temperature can be measured and analyzed using the soil moisture temperature recorder.
The soil moisture temperature recorder was used to control the soil temperature at 5, 15 and 25Â°C. The soil moisture content was controlled at 30%, 50% and 70%. The soil nitridation was performed by measuring the soil nitrate nitrogen and ammonium nitrogen. After the determination of the content and the determination results, the data of the two were analyzed and processed. It was found that nitrification was dominated by the mineralization process, and the suitable mineralization temperature range varied with the soil type, which was a manifestation of the evolutionary adaptation of nitrifying microorganisms. This study found that under the same water conditions, the maximum net mineralization rate appeared at 25Â°C, and the net mineralization rates at 5 and 15Â°C were significantly lower than 25Â°C, indicating that the net mineralization rate had a turning point at 15Â°C, indicating that there was 25Â°C In favor of nitrification of black soil, the critical temperature of nitrification in the soil of alfalfa grassland in autumn is about 15Â°C. At low temperature, both ages show net nitrogen retention. Under low temperature conditions, nitrogen mineralization mainly accumulates NH4+-N, which is expressed as nitrogen retention. This is because the process of nitrification is slowed down at low temperature, and nitrifying bacteria are more important than ammoniated microorganisms. It takes longer to adapt to the cold environment. As the culture temperature is gradually reduced, the microbiological nitrogen and total nitrogen retention rate will also increase due to the growth of suitable microbial populations.
From the correlation between temperature and net mineralization rate, it can be seen that the net mineralization rate is positively correlated with temperature, and the determination coefficient between the net nitrogen mineralization rate and temperature is basically higher than the determination coefficient between the net mineralization rate and moisture. Temperature is the main factor that determines the rate of mineralization.
We are the leading manufacturere of Robots for fully automatic or semi-Automatic Production Line of kitchenware:pan, bowl, dish, cover, basin, cup etc. stainless steel products and other metal-processed products.
Our robots match the corresponding machines: punch, beader, trimmer, annealing machine, oilling machine etc. and serve as soaking liquid device too to realize the automatic production replace the manual operation in the dangerous and harmful working conditions.
It composits of PLC system, Pneumatic system, sensors, sheet inspectors etc. Working under parameter setting and adjusted according the actual conditions.
It imitate human action, hold products with fixed procedure, handle item to control the prodction speed with feature: precision position, stable production quality, Working rhythm adjustable, stable running and reliable, easy maintenance.
To run in the overheated working conditions, our Annealing Robot is the best choice.
Automatic Annealing Robot, Automatic Annealing Robot of Hardware Production Line
Shantou Jiesheng Robot Technology Co. Ltd. , http://www.stjsrobot.com