Oldenbroek J K
Instituut voor Veeteeltkundig Onderzoek 'Schoonoord', Zeist.
Tijdschr Diergeneeskd. 1989 Feb 15;114(4):207-11.
In four experimental studies on feed intake, two completely mixed rations containing 0 and 50 per cent of concentrates respectively were fed ad lib. to dairy cattle of four different breeds: the Jersey, the Holstein-Friesian (HF), the Dutch Black-and-White (FH) and the Dutch Red-and-White (Meuse-Rhine-Yssel). There are considerable differences in feed intake between the breeds, particularly between the Jerseys and the heavier breeds (HF + MRY + FH). The experimental studies in the Jerseys showed that there was an interaction between breed and the composition of the feed, which is due to differences in nutrient requirements between breeds. These variations are attributable to differences in composition of the milk. The dairy breeds, Jersey and HF, use a large part of the energy taken up for milk production and a smaller part for maintenance than do the double-purpose breeds: FH and MRY.
在四项关于采食量的实验研究中，分别向四个不同品种的奶牛自由投喂两种完全混合日粮，其中一种日粮含0%精饲料，另一种含50%精饲料。这四个品种分别是泽西牛、荷斯坦-弗里生牛（HF）、荷兰黑白花牛（FH）和荷兰红白花牛（默兹-莱茵-伊塞尔牛，MRY）。不同品种之间的采食量存在显著差异，尤其是泽西牛与体型较大的品种（HF + MRY + FH）之间。对泽西牛的实验研究表明，品种与饲料组成之间存在相互作用，这是由于不同品种对营养需求的差异所致。这些差异归因于牛奶成分的不同。奶牛品种泽西牛和荷斯坦-弗里生牛用于产奶的能量占摄入能量的比例较大，用于维持身体的能量比例较小，而兼用型品种FH和MRY则相反。
