AZEVEDO, Márcia R. de Q. A.; BELTRÃO, Napoleão E. de M.; KÖNIG, Annemarie.; AZEVEDO, Carlos A. V. de.; PORDEUS, Roberto Vieira.; TAVARES, Tatiana de L.
Abstract:
The development of the root system is a very important factor, among others, for
sustentation or fixation of the plants to the soil; a root system well developed avoids the falling of the
plants, mainly when the aerial part reaches considerable heights. The objective of this research was to
evaluate the influence of the nitrogen manuring and of the irrigation with wastewater on length and
weight of the root of herbaceous cotton plant cultivated in sandy-clay-loam soil. The results showed
that the irrigation with wastewater promoted larger length and weight of the roots than with water of
provisioning, and that the weight increased lineally with the increase of the applied doses of nitrogen.
The plants that just received wastewater presented root length corresponding to the one obtained by
the plants that received foundation manuring with phosphorus and potassium and dose of nitrogen of
240 kg ha-1. The same happening in relation to the weight of root plants where the irrigation with
wastewater promoted weight superior to the one obtained by the plants that received the largest dose
of nitrogen, becoming evident, in what concerns the weight of the root of herbaceous cotton plant in
those edaphic-climatic conditions, that the use of wastewater substituted completely the mineral
manuring up to 320 kg ha-1 of nitrogen.
