Desempenho de juvenis de carpa-capim (Ctenopharyngodon idella) alimentados com silagem de diferentes forrageiras tropicais

Abstract

The objective of this study was evaluated the effect of different tropical forages in the feeding of juvenile grass carp, the treatments were: elephant grass (Pennisetum purpureum); coloniao grass (Panicum maximum); tifton grass (Cynodon dactylon) and Brachiaria sp, being the first three ensilad and the last in natura. All the experimental treatments were supplemented with an experimental pelletized ration with 30% CP and 3000 kcal/ digestively energy /kg in the proportion of 10% of the alive weight. Significant difference was not observed in the chemical composition of forages appraised. There was no difference (P>0,05) of the weight gain in the juveniles fed with Brachiaria sp., coloniao or elephant grass. However, the silage of tifton grass provided (P <0,05) larger weight earnings. The results demonstrate the good potential of tifton grass in the grass use in feed-grass cover, it provides higher weight gain.

Integrated multitrophic aquaculture in ponds using substrate for periphyton as natural source of food

“…Based on the results of the present study and on studies that analyzed supplementation of the grass carp diet with different protein sources and silages (Camargo et al, 2006;Costa et al, 2008;Nascimento et al, 2018;Sponchiado et al, 2018), we recommend including grass forage in IMTAs with grass carp. Feed supplementation with tifton grass silage for grass carp fed with extruded feed (30% CP) improved weight gain (23.1 g in 45 days) and apparent feed conversion (1.45) of this species (Nascimento et al, 2018). However, this management should be recommended with caution, because, when fed exclusively with forage, grass carp presented problems on nutrition and high mortality (Camargo et al, 2006;Satiro et al, 2021).…”