|
| Near Infrared Reflectance Spectroscopy (NIRS) Analysis |
| |
Rapid and low-cost computerized method to analyze forage and grain crops for their nutritive value. NIRS uses infrared light to determine protein, fibre, energy and mineral content.
|
|
| Net Energy (NE) |
| |
Is metabolizable energy minus the heat increment of feeding. The net energy system divides energy requirements into net energy for maintenance (NEm) and net energy for growth (NEg) or net energy for lactation (NEl) in milking cows.
|
|
| Net Energy for Growth (NEg) |
| |
An estimate of the energy value of a feed used for body tissue gain (weight gain) above that required for maintenance.
|
|
| Net Energy for Lactation (NEl) |
| |
An estimate of the energy value of a feed used for maintenance plus milk production during lactation and for maintenance plus the last two months of gestation for dry, pregnant cows.
|
|
| Net Energy for Maintenance (NEm) |
| |
An estimate of the energy value of a feed used to keep an animal in energy equilibrium, neither gaining weight nor losing weight.
|
|
| Neutral Detergent Fibre (NDF) |
| |
Commonly called “cell walls”. NDF gives a close estimate of fibre constituents of feedstuffs as it measures cellulose, hemi-cellulose, lignin, silica, tannins and cutins.
|
|
| Newton (N) |
| |
Unit of force equivalent to the force that produces an acceleration of one metre per second per second on a mass of one kilogram.
|
|
| Nitrate percent (NO3%) |
| |
Part of the nitrogen-containing feed fraction. However it contributes very little to the crude protein percentage. Feeds containing high levels of nitrate (greater than 1 percent) can be toxic to ruminants.
|
|
| Non-protein Nitrogen (NPN) |
| |
Nitrogen that comes from other than organic protein sources that can be used by ruminants to make animal protein. NPN sources are compounds like urea and ammonia.
|
|
| Nontherapeutic |
| |
Use of antibiotics at low dosage levels over long periods. Antibiotic therapy is initiated as a general treatment applied without a specific diagnosis.
|
|
| Nutrients |
| |
An element, compound or group of compounds that can be used as nourishment by an animal. Items such as protein, fat, fiber, energy, minerals, trace minerals and vitamins.
|
