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Effect of organic matter concentration on agricultural limestone dissolution in laboratory soil–water systems
Author(s) -
Han Yangxue,
Boyd Claude E.
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13810
Subject(s) - alkalinity , organic matter , lolium perenne , soil organic matter , environmental chemistry , agronomy , dissolved organic carbon , soil water , environmental science , biology , soil science , chemistry , ecology , poaceae , organic chemistry
Laboratory soil – water systems in which soil organic matter was increased by 0.0%, 0.5%, 1.0%, 2.0% and 4.0% by adding dry, chopped ryegrass ( Lolium perenne ) shoots to sandy soil containing 0.06% organic matter. Agricultural limestone was added to the systems, and pH , alkalinity and hardness of the water were monitored for 65 days. The pH , alkalinity and hardness increased with greater soil organic matter concentration. Amounts of carbon dioxide released by microbial respiration increased at the higher soil organic matter concentrations, and this resulted in more rapid and greater solubility of agricultural limestone. The results suggest that greater soil organic matter concentrations in ponds favour the rate and extent of agricultural limestone dissolution.