A plant seedling nutrient profit and loss state identification method and spectral detection system

Abstract

The present invention relates to the technical field of crop nutritional status detection, and in particular to a method for identifying the nutrient profit and loss status of plant seedlings, comprising the following steps: S1, adding fertilizers in different quantities or proportions during the sowing or growing process of plant seedlings, so that the growth of plant seedlings presents different growth patterns. Nutrient profit and loss status; S2, during the growth process of the seedling, collect the near-infrared spectrum of the cotyledon of the plant seedling; S3, process the near-infrared spectral data to obtain the position information of the red edge of the cotyledon of the plant seedling; S4, according to the red edge of the cotyledon of the plant seedling The location information obtains the red edge position distribution of the cotyledons of the plant seedlings under different nutrient profit and loss states; S5, finds the boundary point for distinguishing the nutrient profit and loss states of the plant seedlings in the red edge position distribution of the plant seedling cotyledons. The invention solves the problem that the existing plug seedlings are fertilized mostly by experience, and the time point of fertilization is not controlled precisely, and the reference value does not need to be obtained through physical and chemical experiments, and the modeling method is simple and feasible.

Description

technical field [0001] The invention relates to the technical field of crop nutritional status detection, in particular to a method for identifying the nutritional profit and loss status of plant seedlings and a spectral detection system. Background technique [0002] At present, in the process of tomato planting, the nutrient status of seedlings is directly related to the quality and yield of tomato planting. If the ratio or quantity of nutrient supply is unreasonable, it will affect the normal growth of seedlings, resulting in a decline in appearance quality and poor growth, especially for seedlings. High-concentration instant fertilizers may have adverse effects on the growth of tomato seedlings. In order to avoid nutrient deficiency, some producers overuse nitrogen, phosphorus, and potassium fertilizers, which not only cause waste of fertilizers and environmental pollution, but also reduce tomato quality and yield. [0003] The paper "Rapid Diagnosis of Tomato Nitrogen,...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing methods for identifying the nutrient profit and loss state of plant leaves need to obtain measured values ​​through physical and chemical methods as reference values ​​to participate in modeling, and the modeling process is complex and tedious, time-consuming and labor-intensive.

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