In the same horizontal belt within the pine forest as measured by the Soil Acidity Automatic Logger, five plots of woodland with the same slope, aspect, and soil type were selected, with 15 trees per plot; in the east, west, south, and north of each plot, In the middle of the 5 sampling points, 20 grams of roots in the rhizosphere of the trees were excavated with 100 grams of soil. After being thoroughly mixed, they were packed in disinfected soil bags and brought back to the room for cultivation, analysis, and statistics.
The soil acidity recorded by the automatic soil logging instrument was extremely acidic in the forest soil, with a pH range of 3.0% to 3.90, and the range of soil acidity in the five communities did not vary greatly. The microbial enzyme activity directly affects the soil fertility, and the microbial activity is weak. The adenosine enzyme is the lowest, only 0.094-0.153, and the enzyme activity is even weaker as the soil acidity increases. The main role of chymase is to promote the hydrolysis of urea to ammonia and carbon dioxide, while ammonia is the direct source of nitrogen nutrition in higher plants. Therefore, the poor growth of the forest is directly related to the acidity of the soil. There are few kinds of soil microorganisms in the woodland, and the number is low, indicating that the acidic soil has a more obvious inhibitory effect on actinomycetes.
Through the soil acidity automatic recorder, the analysis of the existing Pinus taeda forest lands is recommended: In addition to strengthening the conventional management, the application of urea and calcium, magnesium, potassium fertilizers, with or without application of acidic fertilizers, or even a certain amount of lime Soil buffers and other methods neutralize or slow the acidification of the soil. It is also possible to improve soil fertility by applying organic fertilizers, increasing soil organic matter, improving soil physical and chemical properties, increasing soil microbial population and enzyme activity.
Molybdenum can increase steel`s corrosion resistance in the acid-based solutions and liquid metals, thus improve its wear resistance, hardenability, weldability, and heat resistance. As an element which easy to form carbides, molybdenum can effectively avoid oxidation during steel making process, and it can be used alone or mix with other alloy element to achieve the best performance.
A pure molybdenum rod is a cylindrical bar made entirely of molybdenum, a chemical element with the symbol Mo and atomic number 42. Molybdenum is a refractory metal known for its high melting point, excellent thermal conductivity, and resistance to corrosion. Pure molybdenum rods are commonly used in various applications, including the manufacturing of electrodes, heating elements, and high-temperature furnaces. They are also utilized in the aerospace, defense, and medical industries due to their exceptional mechanical and thermal properties.
High temperature smelting additives
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