Organic anion-to-acid ratio influences pH change of soils differing in initial pH
Fatima Rukshana, Clayton R Butterly, Jian-Ming Xu, Jeff A Baldock, Caixian Tang
JOURNAL OF SOILS AND SEDIMENTS | SPRINGER HEIDELBERG | Published : 2014
Purpose: This study aimed to investigate the effect of initial soil pH and organic anion-to-acid ratio on changes in soil pH. Materials and methods: Two soils (Podosol and Tenosol) along with two carboxylic acids (malic and citric acid) and their anions (sodium malate and citrate), commonly found in plant residues, were used in this study. Stock solutions of either malic acid and disodium malate or citric acid and trisodium citrate were added to pre-incubated soils at anion-to-acid ratios of 0:100, 10:90, 25:75, 50:50, 75:25, 90:10, 100:0 and at 0.25 g C kg-1 soil. Soils were adjusted to 80 % field capacity and mixed thoroughly, and three replicates of 50 g of each soil were transferred into..View full abstract
Awarded by Australian Research Council
Awarded by National Basic Research Program of China
We thank Dr. XJ Wang for reviewing the manuscript. This research was supported under Australian Research Council's Discovery Projects funding scheme (projects DP0877882 and 120104100). JM Xu was supported by the National Basic Research Program of China (2011CB100502).