Effects of the application of manioc starch residual water on the soil and on the cultivation of sorghum
Abstract
The present work had the objective to assess the behavior of a sorghum culture submitted to doses of manioc starch residual water. The study was carried out at the Irrigation Technical Center, Maringá State University. The residual water samples were collected in the last pond, at a depth of no more than 0.50 m. Lisimeters of 1,0 m3 volume and 2,0m2 of area were used, applied to a sorghum culture. The experiment constituted of three treatments, in six repetitions, using a random block outline. The treatment consisted of the application of doses of 150, 450 and 900 m3/ha-1 per year of residual waters. The manioc starch residual water supplied the necessity demanded by the sorghum for its full development and production of green mass (dry mass), with a positive response in growth until the maximum dose added of 450 m3/ha-1. The exception was for the variable ‘senescent leaves’, element that, when analyzed in comparison with the others, presented a negative correlation. The residual water demonstrated a fertilizing effect, assessed by the sorghum culture growth in relation to the macronutrients, due to potassium increase.
Published
2008-08-13
Section
Environment
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