Condiciones ambientales y calidad de la leche cruda de un hato Jersey especializado en el trópico húmedo de Costa Rica Rodolfo WingChing-Jones1 y Esteban Mora Chaves2 1. 2.

Escuela de Zootecnia. Centro de Investigación en Nutrición Animal (CINA). Módulo Lechero-SDA. Universidad de Costa Rica. San José, Costa Rica. Correo electrónico: [email protected] Unidad de Calidad de la Leche. Cooperativa Productores de Leche Dos Pinos R.L, Costa Rica. Correo electrónico: [email protected] Recibido 18-IX-2014 • Corregido 14-XI-2014 • Aceptado 30-IV-2015

ABSTRACT: Environmental variables and Jersey cattle milk quality in the humid tropic of Costa Rica. Climatic conditions affect milk production in the humid tropics. They have an effect on on somatic cell count (SCC) and total solids (TS), fat, protein (CP) and lactose concentration in milk. We studied these variables in Turrialba, Costa Rica, for 52 weeks between 2009 and 2010. We collected 784 samples (100 ml each) of milk from 19 animals and analyzed them with the FOSS Electric A/S for MilkoScan TM FT 120 Type 71200. Somatic cell count was done with the 400 Series Fossomatic. Temperature affected TS, fat and lactose content (p