Polyethylene wax (PE wax), also known as polymer wax for short. It is widely used because of its excellent cold resistance, heat resistance, chemical resistance and wear resistance. In normal production, this part of wax can be added directly to polyolefin processing as an additive, and it can increase the gloss and processing performance of the product. As a lubricant, it is chemically stable and has good electrical properties. Polyethylene wax has good compatibility with polyethylene, polypropylene, polyvinyl acetate, ethylene propylene rubber and butyl rubber. It can improve the fluidity of polyethylene, polypropylene, ABS and the mold release of polymethyl methacrylate and polycarbonate. For PVC and other external lubricants, polyethylene wax has stronger internal lubricating effect compared with other external lubricants. Polyethylene wax can be used as a disperant, slip agent, resin additive, and mold release agent.
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Nitrogen and magnesium are the main components of leaf green, so there is a close relationship between chlorophyll and nitrogen. Researchers used chlorophyll meter to study the chlorophyll content and nitrogen of fruit trees such as pear, grape and citrus at different stages. The results of the relationship show that there is a high degree of correlation between the two, so this also shows that it is feasible to use the chlorophyll meter to perform crop nutrition diagnosis.
In fact, people with rich experience in agricultural production will notice that if the fruit tree lacks nutrients, especially if it lacks nitrogen fertilizer, its leaf color can be reflected. It is only through preliminary observation that it is difficult to qualitatively quantify. However, using the chlorophyll meter to measure can objectively colorize the leaf to a numerical standard. It is more accurate and reasonable for the nutritional diagnosis of crops, and can more clearly understand the nutritional status of fruit trees, so as to reasonably manage the fertilization of fruit trees and the orchards. Soil management, in order to achieve high yield and fruit tree planting efficiency.
At present, with the concept of precision agriculture, agricultural production tends to be more scientific. Therefore, the application of scientific instruments such as chlorophyll meter is indispensable, and the data measured by chlorophyll meter can be used as observation and diagnosis of crop nutrition. Standards, such as fruit trees for applying Xia Fei, can be determined based on chlorophyll meter measurements or stop fertilization, avoid crop inhibition and agricultural pollution problems caused by nitrogen abuse, and achieve more refined and higher-yield agricultural production. effect.
Using chlorophyll meter to carry out crop nutrient diagnosis
It can be said that as long as the green plant organs contain chlorophyll, and as a measure of leaf green content chlorophyll analyzer, the application prospects in modern fruit tree production and research prospects are broad. The chlorophyll analyzer is small in size, easy to carry, requires no reagents, and has a direct reading. The result is accurate and reliable. It has very remarkable advantages and is an important measuring instrument in modern agricultural research.