Method for detecting nutrient content in excrement and application thereof

The invention relates to the technical field of bioinformatics, in particular to a method for detecting the content of chemical components in excrement and application of the method. Comprising the following steps: acquiring near infrared spectrum information of excrement; preprocessing the near infrared spectrum information and then substituting the near infrared spectrum information into the near infrared calibration model; the near-infrared calibration model is obtained by modeling near-infrared spectrum information of a plurality of excrement samples by adopting a partial least square method; the pretreatment comprises the following steps: aiming at dry matters, adopting a spectrum-free pretreatment method; aiming at total energy and total organic matters, adopting a vector normalization method; preprocessing the crude protein by adopting a first-order derivative and multivariate scatter correction; the method comprises the following steps: preprocessing crude fat, acid detergent fibers and neutral deterg