L-arginine application triggered soil hydrolytic activity
Department of Soil Science, College of Agriculture, Isfahan University of Technology, Iran
Sajedeh Khosrozadeh   

Department of Soil Science, College of Agriculture, Isfahan University of Technology, 84156-83111, Isfahan, Iran
Data nadesłania: 23-08-2022
Data ostatniej rewizji: 09-12-2022
Data akceptacji: 11-02-2023
Data publikacji online: 12-02-2023
Data publikacji: 19-05-2023
Soil Sci. Ann., 2023, 74(1)161147
Application of amino acids to soils is reportedly associated with controversial responses in soil enzyme activities. The effects of L-arginine application on the fluorescein diacetate (FDA) hydrolysis and protease activity in an oak forest soil was investigated. The FDA hydrolysis and protease activity were regularly measured over a standard incubation period. The addition of L-arginine increased both FDA hydrolysis and protease activity after a lag time of 10 days. After 30 days, the ratio of FDA hydrolysis and protease activity in L-arginine-amended soil samples to those in the control reached 2.0 and 3.7, respectively. Moreover, FDA hydrolysis was found significantly (r = 0.67, P < 0.05) correlated with protease activity. It was concluded that L-arginine was able to stimulate FDA hydrolysis and protease activity, thereby making the soil hydrolytic system capable of facing more complicated substrates.
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