TY  - JOUR
AU  - Pereira, Lucas Felisberto
AU  - Ribeiro Junior, Walter Quadros
AU  - Ramos, Maria Lucrécia Gerosa
AU  - Santos, Nicolas Zendonadi dos
AU  - Soares, Guilherme Filgueiras
AU  - Casari, Raphael Augusto das Chagas Noqueli
AU  - Muller, Onno
AU  - Tavares, Cássio Jardim
AU  - Martins, Éder de Souza
AU  - Rascher, Uwe
AU  - Guimarães, Cristiane Andréa de Lima
AU  - Pereira, André Ferreira
AU  - Mertz-Henning, Liliane Márcia
AU  - Sousa, Carlos Antonio Ferreira de
TI  - Physiological changes in soybean cultivated with soil remineralizer in the Cerrado under variable water regimes
JO  - Pesquisa agropecuária brasileira
VL  - 56
SN  - 1678-3921
CY  - Brasília
M1  - FZJ-2021-03363
SP  - e01455
PY  - 2021
AB  - The objective of this work was to evaluate the influence of the soil remineralizer fine-graded mica schist (FMS) on soybean (Glycine max) physiology, yield, and grain quality under different water regimes (WRs) in the Brazilian Cerrado. The experiment was conducted under field conditions for two years, using four WRs and three treatments: mica schist, conventional fertilization, and control. In 2017 and 2018, the following WRs were evaluated: WR1, WR2, WR3, and WR4, corresponding to a mean value of 100, 65, 44, and 28% of crop evapotranspiration replacement, respectively. Photosynthesis, stomatal conductance, transpiration, internal CO2 concentration, effective quantum yield of photosystem II (PSII) (Fv’/Fm’), quantum yield (PSII) (ᶲFSII), and electron transport rate reduced as a function of the advanced phenological stage of soybean and the reduction in WR. Grain quality was only affected by the WR. The mica schist was statistically similar to conventional fertilization and the control in 2017 and 2018. Yield decreased due to the anticipation of soybean phenological age and WR, but there were no differences between the three treatments in 2017 and 2018. The reduction in soybean yield is attributed to stomatal closure, loss of photoprotective capacity, and damage to the photosynthetic machinery caused by drought.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000691766300001
DO  - DOI:10.1590/s1678-3921.pab2021.v56.01455
UR  - https://juser.fz-juelich.de/record/894711
ER  -