| Continued growth in meat consumption means that slaughterhouse waste is increasing in amount. Composting is harmless, economic and effective way to dispose of organic solid waste. In this paper, the growth parameters of alfalfa, fertility index and microbial populations of degeneration soil were systematic studied with the application of pig, cattle and sheep slaughterhouse waste. The results showed increased emergence rate and shorten germination duration when compost applied, but it varied with kind of livestock and rate of composts. Fresh biomass of alfalfa increased with the application rate, being highest (11.95 g·plant-1) at 37.5 t·hm-2 of sheep slaughterhouse waste, and being lowest CK treatment. Slaughterhouse waste increased soil organic matter and nutrients, but the degree varied with soil nutrients. For soil organic matter and available potassium, they were increased by the range were 9.92%～27.12% and 5.77%～34.03%, while for available nitrogen and available phosphorus, they were elevated by a larger range of 11.79%～47.66% and 16.92%～44.97%, respectively. Applied rate 37.5 t·hm-2 of pig slaughterhouse waste resulted in the largest amount of soil bacteria in August, being 3.98×107 cfu·g-1. The results can build a theoretical foundation for utilization of slaughterhouse waste. |