Ársrit Ræktunarfélags Norðurlands - 01.01.1965, Page 68

TAFLA 1. Áhrif köfnunarefnisáburðar á aminósýru- og
hráproteininnihald grasmjöls.
The effect of nitrogen fertilizer application on the amino acid and
crude protein content in grass meal.
Staður Trial site Reykhólar Akureyri
Aminósýra Amino acid % aminósýra í þurrefni % amino acid in dry matter
KgN/ha 0 40 80 120 80 120
Asparaginsýra 1.30 1.49 1.81 2.09 1.24 1.62
Threonin 0.65 0.73 0.81 0.84 0.54 0.65
Serin 0.62 0.70 0.69 0.58 0.65
Glutaminsýra 1.58 1.79 1.90 1.93 1.32 1.55
Prolin 0.83 0.87 0.83 0.89 0.66 0.73
Glycin 0.77 0.84 0.90 0.93 0.67 0.76
Alanin 1.23 1.35 1.42 1.47 0.94 1.10
Valin 0.85 0.95 1.05 1.11 0.66 0.80
Isoleucin 0.68 0.75 0.82 0.84 0.54 0.65
Leucin 1.22 1.32 1.38 1.42 0.99 1.13
Tyrosin 0.50 0.49 0.57 0.52 0.41 0.45
l’henylalanin 0.76 0.87 0.89 0.92 0.61 0.64
y-aminósmjörsýra 0.19 0.23 0.25 0.28 0.12 0.12
Lysin 0.80 0.91 0.94 0.99 0.60 0.71
Histidin 0.32 0.36 0.33 0.38 0.26 0.32
Arginin 0.83 0.79 0.92 0.93 0.68 0.74
Summa 12.5 14.4 15.5 16.2 10.8 12.6
% hráprótein í þurrefni .... % crude protein in dry matter 17.1 18.2 19.5 20.5 12.9 14.9
Grassýnishornin voru hitaþurrkuð og fínmöluð fyrir efnagreiningu og
eru því nefnd grasmjöl.
The grass samples were heat dried and finely ground before analysis
and are therefore named grass meal.
2 b. Niðurstöður, umræður og ályktanir.
Tafla 1 sýnir innihald grasmjölsins af aminósýrum í pró-
sent af þurrefni. Eins og sjá má af töflunni eykur köfnunar-
efnisáburður, allt að 120 kg N/ha, aminósýruinnihald grass-
ins verulega. Samanborið við engan köfnunarefnisáburð