HUBUNGAN KUALITAS SUSU DENGAN JUMLAH SEL SOMATIK PADA SAPI PENDERITA MASTITIS SUBKLINIS DI WILAYAH KOPERASI SUSU WARGA MULYA PAKEM SLEMAN YOGYAKARTA

The milk consumption of Indonesia citizen has always been increasing every year. However, domestic milk production has not been able to fulfill the national demand of milk consumption. Due to this reason, the government attempts to increase the capacity of domestic milk production that hopefully could fulfill the national demand of milk. Increasing the number of milk product solely would not be enough without the quality improvement of the product itself. There are many causative factors that actually could decline the quality of the milk product. One of those is the increasing number of the somatic cell that could possibly caused by subclinical mastitis. The aim of this research was to identify the quality of the milk and to measure the number of somatic cells on milk. Eighty and 311 samples were randomly taken from dairy farmer of Koperasi Susu Warga Mulya. 500 mL and 10 mL of each samples was put inside the test tubes. Milk quality assessment used in this research consisted of the milk appearance observation and milk composition assessment. The somatic cell of the 10mL sample inside the tube was examined using Breed method. The obtained data was analyzed using the chi-square method to measure the relationship of the milk quality and the number of somatic cells. The result of the milk quality assessment shown that 15% of the samples are on good quality, 43.75% of the samples are beyond the average level and 41.25% of the samples are on the average level of the milk quality. The minimum number of the somatic cells is 373.980cells/mL. The highest number of somatic cells of all samples is 1.024.380cells/mL with an average number of 633.568,9 89.543,9 The calculation result using chi-square method (x2 = 11,64