[Effect of certain trace elements on the nitrogen balance and productivity of silkworms].
D000818:Animals; D012831:Bombyx; D003035:Cobalt; D007477:Ions; D008345:Manganese; D009584:Nitrogen; D014131:Trace Elements; D015032:Zinc
D007477:Ions; D014131:Trace Elements; D003035:Cobalt; D008345:Manganese; D015032:Zinc; D009584:Nitrogen
COBALT; MANGANESE; NITROGEN; SILKWORMS; ZINC