Influence of different housing systems on reproductive performance of large white and crossbreeds sows in Central Viet Nam

Housing has an important role for the productive performance of exotic and crossbreeds sows in Central Vietnam. When reviewing and evaluating the role of the different housing systems for the fertility of sows in householder pig farms, within 3 years from 2006 to 2009, the research on different housing systems have been carried out, which were applied to exotic and crossbreed sows in different provinces of Quang Tri, Thua Thien - Hue and Quang Nam. The results were conducted there more than 54 sows, the new housing system was a higher for reproductive performance of sows, as number of piglets (CS) was 11.12 ± 2.57 versus old housing system 8.20 ± 2.16, P 0.01; and number of litters per sow per year as 2.05 ± 0.25 of improved to 1.92 ± 0.21 of traditional housing systems. Simultaneously, the improved and adopted of a new housing system also improved the growth rate of suckling piglets significantly, 126.25 ± 19.50 g/day compared with 107.12 ± 15.42 g/day, P 0.05 and no significant differences for infection rates of piglets diarrhea, 0.53 ± 0.75 compared to 2.53 ± 1.33 piglets per litter. Innovative housing systems can improve the environmental factors in the microclimate area for exotic and crossbred sows in all 3 provinces with an average temperature was significantly higher, compared with 25.62 ± 2.720C and 22.19 ± 4.510C in the wet season but lower during the dry season compared to 29.52 ± 5.520C with 32.51 ± 6.250C. Temperature index (TI) is a large variation in types of improved housing systems (new style), compared with 23.2 ± 2.07 and 19.58 ± 5.51 in the rainy season, while the index of 27.32 ± 3.25 below shows the markedly improved when there is better ventilation, compared to 32.71 ± 4.65 in old housing system, show that only the temperature changes big old housing system (old style) and will cause the reaction temperature for piglets more the new housing types. Humidity will be improved in the second season for the improved housing system (new style) compared with the traditional ringing tone from 89.9 ± 7.13% to 85.25 ± 2.25% and 86.17 ± 4.11% reduced to 81.9 ± 2.04%. Wind speed improvements in style roof ventilation is higher in traditional housing systems (old style) 0.2 compared to 0.1m/sec.