ARAÚJO FILHO, G. D.; http://lattes.cnpq.br/9711818323831483; ARAUJO FILHO, Geraldo Dutra de.
Resumen:
The cultivation of economically important species for forage production in semiarid
region, such as sweet com, may be an alternative to animal feed
production system, however, one should know the limitation of production and
growth due to water deficit . Thus, the objective was to study the growth and
formation of biomass for forage production of sweet com under water stress in
the experimental área of Pombas Campus, Federal University of Campina
Grande, and the experimental unit consisted of eight planta. In a randomized
block experimental design with four replications, we studied ave irrigation.
evapotranspiration determined from the culture of sweet com (40, 60, 80, 100
and 120% ETc). The evaluations were defined by the growth, formation of
biomass and forage production, and the data submitted to analysis of variance
by F test (p <0.05) and polynomial regression analysis. The reduction applied
on the blade did not affect the growth in number of leaves and plant height, but
reduced the growth in stem diameter and leaf área, survival, sweet com under
stress reduced the área of sweatingl The increase in water availability up to
120% of ETc promoted the increased production of fresh weight of shootl the
highest concentration of dry matter was in the stem. the stem dry weight was
the most sensitive to reduced water availability, water availability has reduced
the amount of matter dry plant. Most forage production was achieved at leveis
above 1 00% of ETc.
