NCGD is one of the most common parameters in our INGOT database. But what is it?

NCGD stands for Neutral Cellulase Gammanase Digestibility and it is used to estimate digestibility especially in ruminant feed. To calculate NCGD a feed sample is first treated with a neutral detergent (see NDF) to remove all components with the exception of the insoluble fibre. This residue is then treated with fibre-degrading enzymes (cellulase and gammanase) to give an indigestible residue. This residue is measured on dry matter basis and then subtracted from 100% to give NCGD. The higher the value of NCGD, the higher the digestibility.