NIRS : Near Infrared Spectroscopy

NIRS is an analytical technic based on the concept of electromagnetic radiation absorption by organic matter. This technic allows a fast, frequent and inexpensive evaluation (prediction) of the chemical composition of various types of organic samples (fodder, fertilizer, soil...). A field portable NIRS allows the evaluation of forage quality or soil fertility directly on the farm. This action aims to develop and disseminate this type of tool for resource management in real time, as well as rationing ruminants or correct fertilization of agricultural fields.

In the ECLISPE project, the SPIR is used on forages to analyse their nutrient values using a portable spectrometer, making it possible to assess the quality of the forages directly on the farm. This action aims to develop and disseminate this type of tool for real-time resource management.

The implementation of the portable SPIR tool requires a preliminary calibration step. This phase requires the collection of a large number of spectral measurements in the field (forages and soils), coupled with chemical analyses carried out using traditional laboratory methods in order to make the tool usable and as accurate as possible.

The tool has made it possible to characterize the quality of "unconventional" feeds in order to develop adaptation strategies via feeding for livestock farms. Coupled with a sociological approach, the NGO DAHARI in the Comoros has shown that cultivated fodder is the most interesting to incorporate into the animals' ration because it is more energetic and high in protein.

Photo : ECLIPSE project, all rights reserved