Influence of Classical and Conservative Tillage Systems on Physiological Parameters and Yield on Soybean Culture in the Transylvanian Plain

Marius Bărdaş, Felicia Cheţan, Alina Şimon, Valeria Deac, Alin Popa, Vasile Oltean

Abstract


The research was carried out during two years between 2017 and 2018 at ARDS Turda, using Onix and Felix
soybean varieties in a classic and conventional system under the conditions of the Transylvanian Plain. The measurements
of physiological parameters were achieved when the culture was fully matured, on 10 plants x 5 readings x 3 repetitions
at the end of June, in the two experimental years, at the beginning of the formation of the pods. Among the physiological
parameters there were selected: the net photosynthesis (An -μmolm
-2
 s
-1
), the evapotranspiration (Evap- mmolm
), leaf
temperature (T
leaf
-
o
C), the active photosynthesis (PAR -μmolm
-2
 s
-1
), the leaf water deficit (VPD-kPa) and water use in
photosynthesis (WUE - μmol mol
-1
). In soybean culture the technology used showed that soy varieties had the  net
assimilation (24 and 28 μmolm
-2
 s
-1
) and the physiological parameters higher  at conventional tillage system (plowing)
compared with the conservative tillage system (chisel) variant, respectively a higher yield (of 2600 and 3000 kg/ha) under
the conditions of the Transylvanian Plain.The main aim of the paper is to identify the important physiological moments
in the development of the soybean culture in the two tillage system classical (plowed) and conservative system tillage
(chisel variant).

Keywords


soybean, variant, yield, tillage system, physiological parameters.

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