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The influence of dietary factors on manure composition and gas emission was studied in pigs. A total of 128 pigs weighing 63.19.67 kg were divided by weight and sex into two dietary treatments: one high (HD) and other low (LD) in energy and lysine, but maintaining lysine:energy ratio (LD; 13.97 MJDE kg-1, 0.72 g lysine MJ-1DE and HD; 14.39 MJDE kg-1, 0.77 g lysine MJ-1DE). Average daily gain and daily feed intake were controlled during 41 days (phase 1). After the productive study, 12 females of 103.33.15 kg (6 per treatment) were selected and housed individually (phase 2). Feces and urine (slurry) were collected during 3 consecutive days. After collection, slurry was pooled by treatment and six 30L buckets (3 per treatment) were filled and stored during a 11-day period. Initial and final composition (dry matter (DM), organic matter (OM), total Kjeldahl nitrogen (TKN), volatile fatty acids (VFA) and pH) were analyzed. Gas emission was measured using a photoacoustic gas monitor. Both, males and females fed HD diets grew more efficiently than pigs fed LD diets (p<0.05). Slurry from pigs fed LD diets showed greater DM, OM, TKN and VFA concentrations and a lower final pH than slurry from HD pigs (p<0.05). Carbon dioxide and ammonia emission did not differ between treatments. Thus, the combination of high energy and lysine content used in the present study for growing pigs (HD) led to a more efficient growth and a lower nutrient concentration in slurry, with no significant differences in gas emission.