Application of soil nutrient analyzer in soil testing and formula fertilization

In recent years, soil tests and fertilizer tests have been conducted for the purpose of achieving balanced fertilization. A series of scientific fertilization techniques, such as special fertilizer configuration and fertilization technical guidance, are the so-called soil testing and fertilization techniques. This technique is not a simple technical task. It consists of a series of theories, methods, technologies, and extension models. system. The agricultural technology promotion system shall be responsible for soil testing, formulation, and guidance for the core of fertilization, and establish a technology promotion platform; the soil testing and fertilization test station, fertilizer production enterprise, fertilizer seller, etc. shall do a good job in formulating fertilizer production and supply services, and establish a good Production and marketing mechanisms; research and teaching units should focus on solving restrictive technologies or problems, and constantly improve and improve soil testing and fertilizer application techniques.

Soil nutrient analyzer mainly refers to portable instruments that can be brought to the field and quickly test soil nutrients. It is a good tool to promote soil testing, formula fertilization, and farmers' awareness of soil testing and fertilizer application. However, it is generally not scientific and accurate. Guide farmers to fertilize. First, the soil nutrient analyzer is operated in the field, and it is difficult to control external environmental conditions. Accuracy and accuracy of soil nutrient test results are difficult to guarantee. Second, the soil nutrient test results are relative values. It is necessary to have matching fertilizer field plots to establish a recommended fertility indicator system. At present, most soil nutrient analyzers have not yet established perfect recommended fertilization indicators. The third is that when there are only 1 or 2 soil samples, the soil nutrient fastness meter can reflect “fast”; on the contrary, when the number of samples reaches a certain batch (more than 3), compared with the routine test of the laboratory, "Testing" becomes "slow testing". Therefore, when carrying out soil testing and fertilizer application in large areas, conventional soil nutrient testing is the best and most effective means to understand soil nutrients.

Field trials are the fundamental way to get the best amount of fertilizers, fertilization time, and fertilization methods for various crops. They are also the basic steps for screening and verifying soil nutrient testing techniques and establishing fertilization indicators. Through field trials, the optimal fertilization amount, base, top dressing distribution ratio, fertilization period, and fertilization method for each fertilizer unit in different crops were grasped, and basic parameters such as soil nutrient correction coefficient, soil nutrient supply, crop manure requirement, and fertilizer utilization rate were figured out. Construct a crop fertilization model to provide basis for fertilizer partitioning and fertilizer formulation.

Soil testing with soil nutrient meter is one of the important basis for formulating fertilizer formula. With the continuous changes in the structure of the modern cropping industry and the continuous emergence of high-yield crop varieties, changes in soil nutrients have become increasingly evident. Only by conducting soil nutrient tests such as NPK can understand the status of soil fertility.

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