Journal of Food, Agriculture and Environment

Hydric and physiological monitoring of soybean in oxisol and oxisol incorporated with biodegradable waste residue 

Author(s):

Alexandre C. Salvestro*, Paulo Sergio Lourenço de Freitas, Roberto Rezende, Erci Marcos Del Quiqui, Cláudia Regina Dias Arieira, José Carlini Junior, Magnun Rodrigo Silva, Vinicius Hicaro Frederico Abe, Matheus A. Mendes

Recieved Date: 2014-05-06, Accepted Date: 2014-09-28

Abstract:

The objective of this work was to determine and compare the evapotranspiration of soybean cultivation at vegetative stage in two soils, oxisol and oxisol incorporated with biodegradable organic waste, for environmental incorporation and water retention, as well as to determine the physiological conditions of the culture in relation to moisture.The experiment was conducted in Umuarama, PR, at the State University of Maringá in the greenhouse. Sowing was carried out in October 2011 in pots with two hydraulic systems (field capacity and 80% of field capacity). The physiological parameters, net photosynthetic rate (A) and stomatal conductance (gs), were assessed using IRGA (Infrared Gas Analyze). From A and gs the efficiency of water use (A/gs) was determined. During the physiological assessments, mass measurements of the pots were carried out through gravity balance, which together with the data from the meteorological station site determined the evapotranspiration of the cultivation. The conclusion was that the average evapotranspiration of the culture at the vegetative phase was 3.0 mm day^-1 for both moisture and soil conditions and culture coefficient of 0.86, where oxisol had lower water use efficiency  than the soil incorporated with biodegradable waste. 

Keywords:

Evapotranspiration, soil moisture, soy

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 3&4
Category: Agriculture
Pages: 265-268

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