Nutritional value

Nutritional value In vitro digestibility of several varieties were performed on samples from the 1st cutting at Korpa (two dates) and Lännäs (one date) 2010. The harvest in Lännäs was later than normal for this location. The results are shown in Table 5. Furthermore, NIR analyses of different feeding qualities were performed on samples from Fureneset 2012. Those results are presented in Table 6. According to Table 5 Birger (perennial ryegrass) had the best digestibility followed by Snorri (timothy) and Kasper (meadow fescue). A little behind these three varieties were Knut, Swaj and Laban. Leikvin had the lowest digestibility. All varieties were harvested at the same time, however, which means that they were harvested at different developmental stages and it was not feasible to harvest each variety at its optimal developmental stage. The pattern in Table 6 is not very different from this except that Leikvin and Swaj were unexpectedly high in digestibility. Thorvaldsson & Kristjánsdóttir (2010) presented results from some of these species where perennial ryegrass was highest in digestibility, followed by timothy and meadow fescue and cocksfoot a little lower. Festulolium var. Felina is a festucoid type (L. multiflorum x F. arundinacea) very much resembling tall fescue, also shown by a stronger similarity to tall fescue var. Swaj than with the perennial ryegrass varieties which more resemble the loloid type festulolium (Østrem et al., 2014).

Table 5. In vitro digestibility (% DM) of several varieties at Korpa (two dates) and Lännäs (one date) for 1st cutting, 2010.

Variety Species Korpa

Lännäs June 19 June 24 June 24 Birger L. perenne 74.2 74.0 72.3 Snorri P. pratense 72.1 69.9 72.0

Kasper F. pratensis 69.5 69.3 72.5

Knut P. pratensis

67.2 69.7 70.4 Swaj F. arundinacea 68.7 68.5 68.7 Laban D. glomerata Leikvin A. capillaris 67.4 67.9 69.6 65.1 63.4 66.6

Rakel P. pratense 69.3

Felina x Festulolium 69.4 Average 73.5 71.3 70.4 69.1 68.6 68.3 65.0

Fig. 10. Clover plots at Fureneset (LØ).

Table 6. Results from NIR analysis of nutritional value at Fureneset, Norway in year 2012, for 2 out of 3 cuttings.

Result from NIR analyses, % DM - Fureneset 2012

Digestibility Crude protein ADF1) ADL2) UNDF3)

Variety 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut Timothy Snorri Noreng Grindstad Lidar Rakel Switch Perennial ryegrass Birger Figgjo Ivar Festulolium Felina Meadow fescue Norild Kasper Smooth meadow grass Kupol Knut Cocksfoot Laban Tall fescue Swaj Common bent grass Leikvin 72.6 18.9 28.6 2.9 5.7 73.0 19.3 28.7 2.6 5.1 68.5 15.2 34.0 2.9 7.7 69.4 15.0 33.4 2.8 6.8 69.8 15.5 33.4 2.9 7.2 69.7 16.1 30.9 2.7 6.9

80.0 69.9 14.7 16.1 22.9 29.9 1.6 2.5 4.6 8.2 78.6 70.6 14.7 16.5 24.5 30.1 1.6 2.4 5.2 8.3 79.6 71.8 15.3 15.5 22.9 28.8 1.6 2.3 4.7 7.8

72.6 72.5 15.8 16.8 28.1 28.7 2.0 2.0 8.5 8.7

75.1 73.2 14.8 18.7 26.6 28.8 2.1 2.2 6.5 5.1 74.4 73.2 15.8 19.1 26.7 28.8 2.1 2.1 6.8 4.8

65.9 67.3 14.6 17.0 32.2 34.6 2.8 2.5 12.4 10.4 72.6 71.7 18.9 17.0 26.8 28.3 2.3 2.2 8.4 7.5

66.7 69.3 14.8 21.4 30.7 29.0 2.7 2.8 10.1 6.9

73.5 70.4 16.4 15.1 27.8 30.0 2.0 2.0 7.1 8.5

76.0 68.7 19.6 21.0 23.8 28.9 2.2 2.6 6.7 7.6 Average grasses 74.1 70.7 15.9 17.3 26.6 30.3 2.1 2.5 7.4 7.2

Digestibility Crude protein ADF1)

ADL2) UNDF3) Clover Variety 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut 1st cut 2nd cut Red clover SW Torun 66.4 70.1 21.4 24.1 29.2 26.2 4.3 3.9 7.4 5.1 78 69 SW Yngve 66.4 71.5 21.7 23.9 29.6 26.6 4.1 3.6 5.9 4.7 65 54 Lavine 66.1 70.6 20.8 24.4 29.9 26.4 4.2 3.7 6.0 5.1 74 60 Lea 66.9 70.2 21.3 23.4 28.2 27.0 4.3 3.7 6.1 5.5 86 58 White clover Norstar Litago Alsike clover Alpo 69.8 71.4 20.0 19.5 30.5 28.3 2.9 2.9 6.8 7.5 15 26 69.9 70.8 21.8 18.4 30.0 28.7 3.2 3.0 6.0 8.3 26 30

72.9 74.5 21.5 20.8 28.2 26.5 3.3 3.1 4.5 5.1 37 32

Mixture Red and white 68.8 69.8 21.5 24.1 30.1 26.2 3.8 4.0 5.5 5.0 52 70 Average clovers 68.4 71.1 21.3 22.3 29.5 27.0 3.8 3.5 6.0 5.8 54.1 49.9

1) Acid detergent fibres. 2) Acid detergent lignin. 3) Undigestible neutral detergent fibres.