1. What are you going to test?
For the detection of soil, reference may be made to forest soil testing methods, agricultural soil testing methods, environmental soil testing methods, etc.; for detecting chemical fertilizers, reference may be made to compound fertilizer testing methods, organic fertilizer testing methods, and the like.
Then refer to the relevant standard specifications to determine the detection elements, the standard preferred mandatory national standard (such as: GB7874-87), followed by the recommended national standard (such as GB/T1591), which is mandatory (such as HJ591), then It is a recommended line (such as HJ/T1591).
For the relevant standards and specifications for soil and fertilizer, users can go to Zhengzhou Pengshen Agricultural Technology Co., Ltd. official website to view the relevant standards in the "Technical Support-Download Center".
Second, which method is tested?
At present, commonly used detection methods include chromatography, spectroscopy, mass spectrometry, electrochemistry, etc., and the user has to choose one that is most suitable.
Which test method is recommended by the national standard, this is the first choice, but consider your own specific circumstances, such as funds, the national standard recommended atomic absorption method, you can not afford atomic absorption, then you can consider titration or colorimetry.
Which testing methods are commonly used in the industry, this can be used as a reference to see which instruments are used in other people's laboratories to detect, peers are generally more easily accepted by users, so you can consult.
Third, where to buy instruments?
Zhengzhou Pengjian Agricultural Science and Technology Co., Ltd. is a comprehensive high-tech enterprise specializing in agricultural practical technology research such as soil testing and fertilization, agricultural research and development, production and sales, technical consultation and agricultural technology promotion. According to national standards and market demand, Relying on the scientific research strength of universities, R&D has produced more than 100 kinds of agricultural special instruments and related integrated system solutions.
The main products are soil nutrient speed measuring instrument (earth measuring instrument), fertilizer detector / compound fertilizer detector / organic fertilizer detector (fertilizer speed measuring instrument), pesticide residue speed measuring instrument, plant disease diagnostic instrument, chlorophyll measuring instrument; The laboratory construction of the crop hospital, the construction of the farmer's dealer laboratory, the construction of the cooperative laboratory, and the solution for the construction of the fertilizer/organic fertilizer manufacturer's laboratory.
The company is committed to agricultural science and technology to promote modern agriculture, and insists on providing the most practical agricultural instruments for rural cooperatives, greenhouse farmers, contracted land farmers, agricultural resources distributors and fertilizer/organic fertilizer manufacturers!
Fourth, which instrument to buy?
This is the most important thing. Users should purchase instruments according to their own measurement requirements. According to their long-term planning, it is best to do the plan within 10 years. Try to meet the development requirements within 10 years. Don’t just buy them, the parameters are not satisfied, and they are eliminated. That would not be worth it. So choose the necessary model according to your own development.
The soil fertilizer and nutrient speed measuring instrument developed by Zhengzhou Pengjian has practical, standard, functional and second-generation functional types according to the test items and accuracy. The utility model can detect nitrogen, phosphorus, potassium, organic matter, water, calcium, magnesium, sulfur, boron and silicon chloride in soil fertilizer; standard type can detect nitrogen, phosphorus, potassium, organic matter, moisture, calcium, magnesium, sulfur, iron, manganese, boron and zinc in soil fertilizer. , copper, chlorine, silicon; functional type can detect nitrogen, phosphorus, potassium, organic matter, water, calcium, magnesium, sulfur, iron, manganese, boron, zinc, copper, chlorine, silicon, lead, arsenic, chromium, cadmium, Mercury; the second-generation functional type has all the features of the function and is more accurate.
Users can choose the right model according to their needs and budget.
For the most common waxy and sweet corn on the market, waxy corn has a higher nutrient content than regular corn, containing 70-75% starch (and almost all straight-chain starch), more than 10% protein, 4-5% fat and 2% multivitamins, with more grains, VA, VB1 and VB2 in protein than rice, with the highest fat and VB2 content. Yellow maize also contains carotenoids, such as rice and wheat. The molecular weight of waxy maize starch is more than 10 times smaller than that of ordinary maize, and the starch makes glutinous rice sticky and soft, softer than ordinary hard maize. It is more than 20% more digestible to eat than regular maize and it is suitable for people with less than perfect teeth. At the same time, it is not suitable for diabetics because of the very high content of straight-chain starch (a polysaccharide).
Waxy maize is also known as sticky maize. The grain has coarse, waxy endosperm, similar to shiny, glassy (clear) grains such as hard and dent maize. Its chemical and physical characteristics are controlled by a recessive gene, which is located on chromosome 9. 100% of the starch in the endosperm is straight-chain starch.
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