Comparative effects of mineral fertilizer and digestate on growth, antioxidant system, and physiology of lettuce under salt stress

Abstract Salt stress in plants presents a major challenge to future agricultural production. Digestate has various effects on plant growth, but little information is available its the antioxidant system and physiological characteristics of lettuce under salt stress. In this study, impacts mineral fertilizer digestate application edible parts were compared three salinities. Experimental treatments comprised two types (mineral digestate) NaCl concentrations (0, 3, 7.5 dS m − 1 ). High resulted significantly lower photosynthesis, indices with those no addition. However, condition, (DA) increased fresh weight (42%), dry (27%), photosynthetic pigment contents photosynthesis (20%) that (MFA). Accumulation reactive oxygen species was markedly lower, membrane stability index therefore higher, DA MFA within same salinity level. Lipid peroxidation all treatments. up-regulated further enzymatic non-enzymatic capability MFA. addition, total water use water-related indices, such as efficiency weight, relative content, higher The instead could be promising practice alleviate negative impact productivity plants.