In this work was evaluated the response of yam (Dioscorea alataL.), Mimoso clone, to sources and dosis of organic manures. The sowing was established in 1998, november, on a dark clay texture distroferric Eutrustox soil, planted with vegetables in last years. It was utilized a ramdomized block experimental design with three replications. The treatments were arranged in fatorial scheme, formed by four organic manuring levels (0, 1, 2 and 3), in relation to three sources (organic compost, enriched compost and bed of chicken manure). The Levels 0, 1, 2 and 3 were corresponded to 0, 3, 6 and 9 t.ha-1 in dry matter, of organic compost and bed of chicken manure and to 0, 2, 4 and 6 t.ha-1 of enriched compost. The results indicated that manures don't elevated the rizomes yield, which varied from 17 to 25 t.ha-1, due to the experimental area presented satisfatory levels of fertility to the nutritional yam needs. Nevertheless, these manures elevated the production of rizomes which varied from 150 to 600 g, which are best valuated to market.
Yam; organic manuring; nutrition and manuring
