Resumen

MULLER, Liziany et al. Effect of nutrient solutions on production and quality of hydroponic forage wheat (Triticum aestivum L.). Zootecnia Trop. [online]. 2006, vol.24, n.2, pp.137-152. ISSN 0798-7269.

The objective of this study was to evaluate the effect of different nutrient solutions and harvest date on production and nutritive quality of hydroponic forage wheat (Triticum aestivum L.). The experiment was conducted inside a protected environment at Fitotecnia Department of the Universidade Federal at Santa Maria, Brazil. The experimental design was a randomized complete block. Treatments consisted of two nutrient solutions (SIN: inorganic solution by Neves (2001), and SONC: organic solution of the vermicompost) and four harvesting dates (4, 8, 12, and 16 days after emergence), distributed in a 2x4 factorial scheme. It was observed interaction (P<0.05) between nutrient solution and harvest date for the variables plant height, dry weight (DW), crude protein (CP), soluble protein (SP), and neutral detergent fiber (NDF). SONC and SIN showed a decrease in DW values when delayed harvest dates. SONC presented an increase in the values of DW, CP, and SP, but a decrease in NDF in comparison with SIN in all harvest dates. It was observed an increase in acid detergent fiber (ADF), lignin (LIG), and cellulose (CEL) and a decrease in digestibility “in vitro” when delaying the harvesting dates. It was not observed statistical difference (P>0.05) in ADF, LIG, CEL, and digestibility “in vitro” among the solutions. The best quality characteristics (CP and digestibility “in vitro”) of hydroponic forage wheat were obtained when harvest was 8 to 12 days after sowing.

Palabras clave : protected environment; hydroponic system; vermicompost.