The effect of anaerobic digestate derived composts on the metabolite composition and thermal behaviour of rosemary

Abstract

The study reports on the effect of anaerobic digestate derived composts on the metabolite composition and thermal behaviour of rosemary ( Rosmarinus officinalis L.). Plants were cultivated in semiarid soil under four different fertiliser treatments (composts of anaerobic digested cattle (C) or pig slurry (P) at 30t/ha and 60 t/ha, and two control treatments (inorganic fertiliser and no fertiliser application). Samples of leaves and stems were analysed to investigate the effect of treatment on chemical composition and thermochemical properties. Three orthogonal analytical approaches were used, namely: Fourier transform mid infrared spectroscopy (FTIR), gas chromatography/mass spectrometry (GC/MS) and thermochemical gravimetric analysis (TGA). FTIR and GC/MS showed fertiliser treatment resulted in tissue specific changes in sample metabolite composition. Fertiliser treatment was detected to change the thermogravimetric properties of the leaf samples and from inorganic and composted pig slurry digestate treatments had greater ash content and lower proportions of fixed carbon compared with samples from the unfertilised control treatment. This study provides information on how the composition of rosemary might be altered by fertiliser application in regions of poor soil, and has implications for biomass quality when rosemary is grown on semi-wild sites for the purpose of soil improvement.

Physiological Biochemistry-Combined Transcriptomic Analysis Reveals Mechanism of Bacillus cereus G2 Improved Salt-Stress Tolerance of Glycyrrhiza uralensis Fisch. Seedlings by Balancing Carbohydrate Metabolism

“…The next three important steps in the TCA cycle are conversion of isocitrate to α-ketoglutarate catalyzed by ICDH, succinate to fumarate catalyzed by SDH with the generation of energy in the form of FADH 2 , and malate to oxaloacetate catalyzed by MDH ( Saha et al, 2012 ). Specifically, ICDH regulates nitrogen assimilation by maintaining the 2-oxoglutarate level ( Bustamante et al, 2019 ), thereby linking C and N metabolism, and relates to plant antioxidants ( Liu et al, 2010 ). In our study, G2 increased ICDH activity in G. uralensis under salt stress, which could affect C and N metabolism and antioxidant system.…”

Analysis of Biogas Component Production during Anaerobic Digestion of Sour Cabbage in Microaeration Conditions under Different pH Conditions

“…Low organic acids, carbon dioxide, and hydrogen are obtained in acidogenesis (in DF case process stops here). Then, in AD, hydrogen with carbon dioxide is converted into methane [4]. DF in an AD process is sometimes called hydrogenotrophic anaerobic digestion [5].…”