Colonialgras (Panicum maximum Jacq.) mixed with five tropical legumes on fertilized with increasing levels of N was studied in a field plot experiment carried out at the Estação Experimental de Nova Odessa of the Instituto de Zootecnia, in the State of São Paulo. The soil of the place is a Red-Yellow Podzolic one, variation laras. The legumes studied were: centrosema (Ceritrosema pubescens Benth.), perennial soybean (Glycine wightii), siratro (Macroptilium atropurpureum (DC.) Urb.), galáxia (Galaxia striata (Jacq.) Urb ), and stylo (Stylosanthes guyanensis (Aubl.) Sw). Results of three years shoved that colonial grass (Galactia striata) mixture yielded the equivalent to colonial grass alone fertilized with 181 kg of N/ha/year. Colonialgrass mixed with either one of the other four legumes yielded the equivalent of the grass alone fertilized with 40 to 93kg of N/ha/ year. Colonialgrass mixed with either one of the five legumes showed greater protein, P and Ca contents than colonialgrass fertilized with the hightest level of N used (225 kg of N/ha/year).
Effects of mineral nitrogen and legumes na colonialgrass, Ponicum maxinium Jacq., dry matter production/ Efeitos do nitrogênio mineral e de leguminosas sobre a produção do capim-colonião (pronicum maximum jacq.)