Fresno Baquero María, Álvarez Ríos Sergio, Rodríguez Rodríguez Elena, Díaz Romero Carlos, Darias Martín Jacinto
Animal Production Unit. Canary Agronomic Science Institut (ICIA). Aptdo nº 60. 38200 La Laguna, Tenerife.
Department of Analytical Chemistry, Nutrition and Food Science. University of La Laguna. 38201-La Laguna, Tenerife.
J Dairy Res. 2011 May;78(2):250-6. doi: 10.1017/S0022029911000161.
Dry matter, protein, fat, pH, mineral (Na, K, Ca and Mg) and trace elements (Fe, Cu, Zn and Se) concentrations were determined in samples of goats' milk and in fresh, semi-hard and hard cheeses to study the effect of the goats' diet and the type of rennet used for the cheese processing of the Palmero Protected Designation of Origin cheeses. Two groups of 20 Palmero goats were fed 2 different diets: a Palmero diet (PD supplied by native forages adapted to subhumid areas, which had a high ratio of long fibre to concentrates (65:35), and an actual diet (AD), the most commonly used by goat farmers, with a low ratio of long fibre to concentrates (35:65). In general, the cheese samples from goats fed with PD had higher mean Ca, Zn, Cu and Se concentrations than the samples obtained from AD fed goats. The diet exhibited a greater influence on the chemical composition of the cheeses than the rennet used in their production. Applying a stepwise linear discriminant analysis a complete percentage of correct classifications of the three types of cheeses according to the diet of the goats was observed.
测定了山羊奶以及新鲜、半硬质和硬质奶酪样本中的干物质、蛋白质、脂肪、pH值、矿物质（钠、钾、钙和镁）和微量元素（铁、铜、锌和硒）浓度，以研究山羊饮食以及用于帕尔马罗原产地保护奶酪加工的凝乳酶类型的影响。两组各20只帕尔马罗山羊被喂食两种不同的饮食：一种是帕尔马罗饮食（PD，由适应亚湿润地区的本地草料提供，长纤维与浓缩饲料的比例很高（65:35）），另一种是实际饮食（AD），这是山羊养殖户最常用的，长纤维与浓缩饲料的比例很低（35:65）。一般来说，喂食PD的山羊所产奶酪样本中的钙、锌、铜和硒平均浓度高于喂食AD的山羊所产样本。饮食对奶酪化学成分的影响大于生产中使用的凝乳酶。通过逐步线性判别分析，观察到根据山羊饮食对三种类型奶酪进行正确分类的完整百分比。
