Concentration of acid detergent insoluble nitrogen in grassland forage
2001
Verbic, J. | Babnik, D. | Resnik, M. (Agricultural Inst. of Slovenia, Ljubljana (Slovenia))
The relations between the proportion of acid detergent insoluble nitrogen (ADIN, in g kg*[-1) total N) on one hand and concentrations of crude protein and crude fibre on the other have been investigated. It was found that with increasing concentration of crude protein (CP) the proportion of ADIN in grassland forages decreased while with increasing concentration of crude fibre (CF) it increased. At given CP concentration the proportion of ADIN in legumes was higher than in grasses. Proportion of ADIN in hay from extensively managed grasslands was considerably higher than in hay from intensively managed grasslands. At given CP concentration there was a tendency of lower proportion of ADIN in first cut silages in comparison to silages which were made from consecutive cuts. Equations which enabled prediction of the proportions of ADIN in the samples of green forage, hay and silage on the basis of concentration of CP were calculated. It was established that they allowed rough estimates. For the present, accurate concentration of ADIN can be achieved only by the means of chemical analysis.
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