Nondestructive testing method for quality of compost products

Abstract

The invention relates to a nondestructive testing method for the quality of compost products, comprising the following steps: 1) utilizing a near infrared ray diffuse reflectance spectrum collection device to collect near infrared ray diffuse reflectance spectrums of representative samples of the compost products, and converting spectrum information into corresponding digital information; 2) determining standard content of modeling; 3) implementing the extraction and pretreatment for characteristic spectrums on the near infrared ray diffuse reflectance spectrums obtained in the step 1), to result in optimal spectrum data information in the near infrared ray diffuse reflectance spectrums; 4) regarding a spectrum data point combination, preferably selected in the step 3), as an input vector, and based on support vector machine regression method in combination with leave-one-out cross validation method, establishing a correction model for the contents of major technical indexes of the near infrared ray diffuse reflectance spectrums of the compost products to be tested, in combination with standard contents of samples measured in the step 2); 5) evaluating the model; and 6) collecting and inputting the near infrared ray diffuse reflectance spectrums of the compost products to be tested to the correction model established in the step 4), and computing the contents of major technical indexes predicating the samples to be tested. The nondestructive testing method can perform rapid and efficient testing on the quality of organic fertilizer products after high-temperature aerobic composting and is suitable for the rapid and nondestructive high-accuracy quantitative testing for the major technical indexes of organic fertilizer products after the high-temperature aerobic composting of agricultural and forest remainders.

Description

technical field [0001] The invention relates to a detection method of an organic fertilizer product, in particular to a non-destructive detection method of the quality of a compost product. Background technique [0002] With the intensive development of animal husbandry, the annual output of livestock and poultry manure in my country is showing a growing trend. If a large amount of livestock and poultry manure is not handled properly, it will easily cause ecological and environmental pollution. In recent years, the high-temperature aerobic composting treatment method has become an important way for the harmless and resourceful utilization of a large number of livestock and poultry manure in my country. Moisture content, organic matter, total nutrient content (nitrogen, phosphorus, potassium content) and pH are important technical indicators to measure the quality of compost products. Traditional composting product quality testing methods are cumbersome, time-consuming, lab...

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Problems solved by technology

Traditional composting product quality testing methods are cumber

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