Comparing investigations on the nutrient supply of grazing or indoor fed dairy cows: 1. Communication: Experimental schedule, feed quality and feed intake

Manusch, P.; Schwarz, F.J.; Kirchgessner, M.

Wirtschaftseigene Futter 39(1): 87-100

1993


Accession: 008353656

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Abstract
In five experimental series the grass intake of grazing or indoor fed dairy cows was compared. For both treatments the experimental milk herd, which contained high pregnant heifers and cows and early lactating cows or primus paraous cows, too, was divided into two identical populations. The ad lib.-offered grass ration was completed with maize silage (2.8 kg dry matter (DM) per cow, daily) and concentrate ( gt 16 kg of milk). The grass intake was measured by the 'difference method' before and after grazing and by weighing the ration for indoor feeding in a single feeding system. In each of the five experimental series grass of the first growth or regrowth (second to fourth) was fed. In average of all experiments the grass has 17.3% of DM, 11.7,19.6, 3.4 and 22.8% i. DM of crude ash, crude protein (CP), crude fat and crude fibre and 5.9 MJ NEL (NE) per kg DM, respectively. The overall daily intake of grass, roughage or total feed of the treatment with indoor feeding was significantly lower with mean results of 9.9, 12.7 or 14.2 kg DM compared to the grazing treatment with 10.9, 13.7 or 15.4 kg DM per cow. The results distinctly showed an influence of the possibility of the selection for grass. Therefore, the content of CP and NE of consumed grass with grazing significantly increased up to an average of CP of 21.1% i. DM and NE of 6.2 MJ NEL per kg DM, while the contents of consumed grass with indoor feeding scarcely differed to the offered grass in CP of 20.1% i. DM and NE of 6.0 MJ NEL per kg DM.