Ruohojauhon vaikutus teurassikojen ruokinnassa

Authors

• Elsi Ettala Pohjois-Suomen sikatalouskoeasema, Haapajärvi

DOI: https://doi.org/10.23986/afsci.71707

Abstract

The 108 experimental animals were divided into three groups, receiving 0 %, 5 %, and 10 % ground grass respectively. The mean crude fibre content of the grass was 21.2 %/dry matter, and 1.23 kg of the grass was equivalent to 1 fodder unit (1 kg barley). Two-factor analysis of variance showed that there was a highly significant difference in daily gain between the control group and those groups receiving the grass. Partial regression analysis of the simultaneous effects of % ground grass and total fodder units on the daily gain gave regression coefficients of –5.767 and –1.116 respectively. The combined coefficient of determination in the daily growth of these two factors was 74 %. Fodder consumption per kilo weight increase and the feeding period required to reach slaughter weight rose considerably in the groups receiving the ground grass. The killing-out percentage of the 10 % grass group was significantly (P < 0.05) less than that of the control; likewise the back fat was thinner (P < 0.05) than in the control. The results show that the cost of ground grass is a decisive factor in the feed of fattening pigs.