Estimation of red clover (Trifolium pratense L.) forage quality parameters depending on the variety, cut and growing year
2006
Drobna, J.,Vyskumny Ustav Rastlinnej Vyroby, Piestany (Slovak Republic) | Jancovic, J.,Slovenska Polnohospodarska Univ., Nitra (Slovak Republic)
A field trial was conducted to determine the nutritive value of eight Slovak and Czech red clover varieties and to quantify the effects of variety, cut and year on red clover forage quality. There were significant differences between the evaluated varieties concerning their quality, i.e. PDIE, intestinal digestibility of rumen non-degraded protein, net energy values and ash content (P less than 0.01). The diploid variety Viglana had the best quality with high protein and energy values. The tetraploid varieties Javorina and Dolina were outstanding in protein content, but had the lowest energy values. The nutritive value was significantly affected by the cut number. The first cut provided forage with a significantly lower (P less than 0.01) crude protein (CP) content, CP digestibility, CP degradability (degNL), PDIN, PDIE, and with a significantly higher crude fibre content and energy values (P less than 0.01). The differences between varieties were more pronounced in the second and in the third cut. Significantly higher (P less than 0.01) PDIE, PDIN, degNL, net energy values and ash contents were found in the first production year than in the two other years.
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