Abstract: In order to explore the whole wheat silage method, Wenxin black pig and Sanyuan (Ductile×Landrace×Yorkshire) hybrid pigs were taken as the research object, and the feasibility of using whole wheat silage in Chinese local pigs and imported Sanyuan pigs was proved through feeding comparative experiment. In this study, 120 Wenxin black pigs with similar body weight were selected and fed the basal diet or the basal diet was replaced with 14% wheat whole plant. The average daily feed intake and average daily gain (ADG) were measured. At the same time, 24 pigs (Duroc×Landrace×Yorkshire) with similar body weight of (60±0.16 kg) were randomly divided into 2 treatments with 3 replicates per treatment and 4 pigs per replicate. The experiment was divided into two stages: early fattening (60~90 kg) and late fattening (90 kg to out). In the control group, pigs were fed basal diet for 2 consecutive stages, and nutrient requirements of finishing pigs were referred to NRC(1998). In the experimental group, 20% and 40% whole silage wheat were used to replace the basal group with the same amount of silage wheat at two stages. Production performance, slaughter performance, organ weight and meat quality were determined. The results showed that Wenxin black pigs had higher acceptance of wheat silage and had no effect on feed intake. The end weight of experimental group was 5.8% higher than that of control group. The average daily gain and average daily feed intake in the control group were significantly higher than those in the test group (P<0.01), while the feed to gain ratio in the test group was significantly higher than that in the control group (P<0.01). The average daily gain(ADG), average daily feed intake(ADFI) and feed/gain (F/G) in the control group were significantly higher than those in the test group (P<0.01), but slaughter performance and meat quality were worse than those in the test group. It is proved that using whole wheat silage to feed Wenxin black pig can not only keep its good quality, but also save the cost of breeding. The performance of the test group adding 40% whole plant silage wheat was higher than that of the test group adding 20% whole plant silage wheat. The addition of whole plant silage wheat in the diet increased the volume of stomach and small intestine, and improved the carcass performance and meat quality.

Key words: wheat silage, wenxin black pig, sanyuan pig, production performance, meat quality