Preliminary communication

VARIABILITY IN NUTRIENT COMPOSITION AMONG RAPESEED VARIETIES

Eva Straková ; Veterinarsko i farmaceutsko Sveučilište Brno, Češka republika
Vlasta Šerman ; Veterinarski fakultet Sveučilišta u Zagrebu, Hrvatska
Pavel Suchý ; Veterinarsko i farmaceutsko Sveučilište Brno, Češka republika
Nora Mas ; Veterinarski fakultet Sveučilišta u Zagrebu, Hrvatska
Vladimír Večerek ; Veterinarsko i farmaceutsko Sveučilište Brno, Češka republika

Abstract

The aim of the study was to show differences in basic substances contained in seeds including amino acids of several varieties of rapeseed. Attention was particularly focussed on the levels of nitrogen-containing substances and amino acids in order to find out whether rapeseed can be used as a suitable source of protein diet for farm animals. The work provides the results of analyses of 26 species of winter rapeseed harvested in 2006. The levels of individual substances including amino acids are related to 100% of dry matter to allow the objective comparison of individual varieties analysed. The levels of substances analysed in winter rapeseed varieties (related to 100% dry matter) varied as follows: proteins -203.6 – 238.0 g/kg, fat – 314.9 – 422.0 g/kg, fat following hydrolysis 441.7
– 508.5 g/kg, fibre - 172.1 – 238.7 g/kg, ADF - 111.3 – 149.6 g/kg, ADL -38.6 – 67.8 g/kg, NDF 243.4 – 315.3 g/kg, nitrogenfree extracted substances 137.7 – 203.7 g/kg, starch – 32.5 – 40.4 g/kg, organic mass –951.3 – 958.9 g/kg, ash – 41.1 – 48.7 g/kg, calcium 4.6 – 6.7 g/kg, phosphorus 6.5 – 8.6 g/kg, magnesium - 2.0 – 3.5 g/kg, and gross energy -27.6 – 28.6 MJ/kg. Aminoanalysis shows that individual rapeseed varieties differ significantly in the amino acids content which confirms qualitative differences in protein composition of individual varieties. We found variability in individual amino acids among the rapeseed varieties investigated (related to 100% of dry matter in a sample): aspartic acid -10.0 – 16.9 g/kg, threonine - 5.5 – 10.0 g/kg, serine - 5.6 – 9.9 g/kg, glutamic acid - 23.4 – 38.2 g/kg, proline - 1.8 – 16.4 g/kg, glycine - 6.5 –12.2 g/kg, alanine - 3.2 – 11.0 g/kg, valine - 7.8 – 12.5 g/kg, methionine -1.6 – 4.4 g/kg, isoleucine - 5.7 – 9.5 g/kg, leucine - 9.9 – 16.7 g/kg, tyrosine - 4.1 – 6.6 g/kg, phenylalanine - 5.8 – 9.7 g/kg, histidine - 4.0 – 6.5 g/kg, lysine - 10.1 – 14.6 g/kg, arginine - 10.2 – 16.9 g/kg. It follows from the results obtained that the varieties studied vary great by in the levels of individual amino acids rather than in gross nutrient composition.

Keywords

nutrient composition; rapeseed varieties

Hrčak ID:

28967

URI

https://hrcak.srce.hr/28967

Publication date:

9.10.2008.

Article data in other languages: croatian

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