This research was aimed at evaluating effects of supplementing enzymes, organic acids, bentonite to the diet on N and P excretion and hydrogen sulfide and ammonia emissions from slurry of 65-90 kg pigs. The experiment was done on 30 Duroc x Fl (Landrace x Yorkshire) crossbred pigs with initial body weight of 66.7 + or - 3.5 kg. The experiment was arranged in a randomized complete block design with one fator including one control = without supplementing enzymes, organic acids, bentonite and four treatments (i) control + enzymes; (ii) control+ organic acids; (iii) control + enzymes + organic acids; (iv) control + bentonite. Air emitting from the manure pit was collected to measure ammonia and hydrogen sulfide emission. Slurry samples were collected to measure slurry chemical characteristics of dry matter, pH, N and P contents. Results showed that supplementing enzymes; organic acids; enzymes + orgnic acids to the diet did not affect daily weight again and feed convesion efficiency of 65-90 kg pigs (P 0.05). Supplementing enzymes, organic acids, enzymes + orgnic acids, bentonite to the diet reduced ammonia emssion (P0.05) from pig slurry compared to the control diet 22.1 percent, 24.8 percent, 38.3 percent and 1.7 percent, respectively. Supplementing enzymes, organic acids, enzymes + orgnic acids, bentonite to the diet did not affect dry matter content ( percent), N and P content ( percent in dry matter), the amount of N and P excreted in the slurry (g/pig/day) and H2S emssion from the slurry (P0.05) from pig slurry.
Lọc theo danh mục
Lượt truy cập :
19,686,750
Xem toàn văn