Magnesium leaching processes from sod-podzolic sandy loam reclaimed by increasing doses of finely ground dolomite

Abstract

The results of 8-variable column experiment on a strongly acidic sod-podzolic sandy loam reclaimed by the finely ground dolomite in a wide dose range are presented. The aim of the research was to measure and estimate leaching of magnesium (Mg) and its migration pattern. The dolomite powder at the different doses calculated by hydrolytic acidity (Hy) was applied at 225, 337.5, 450, 675, 900, 1350 and 1800 mg, that corresponded to 0.5, 0.75, 1.0, 1.5, 2.0, 3.0 and 4.0 Hy, respectively. The migratory ability of Mg was studied in 12-times washing column experiment. Each washing was carried out by 400 ml distilled water, simulating the volume of annual precipitation percolating through the soil stratum yearly. The increase in the amount of leaked moisture contributed to the enhancement of the eluvial losses of Mg. The maximum loss of Mg due to migration was established in the filtrates of the first washing. As the dose of dolomite increased, the amount of the soil Mg migrating with the total amount of Mg decreased from 27% to 7.5%. Complete removal of water-soluble Mg from the soil was not achieved in any of the studied treatments. Applied empirical estimations correctly described the process of leaching of Mg during repeated washing of the soil. Based on the data on the amount of leached Mg from soil reclaimed by a wide range of dolomite doses, a clustering of the empirical equations was performed. It was shown that in the 1 st stage of the experiment (from 1 to 4 washings) the rate of Mg leaching increased significantly with an increase in the dose of the dolomite. In the 2 nd stage (4 to 12 washings) such a pattern was not established. Depending on the dolomite dose applied, the losses of Mg increased from 14.05 to 50.6 mg compared to 3.8 mg in the non-limed (control) treatment. The main finding is that finely ground dolomite in an amount exceeding a full dose calculated by 1 Hy applied to sod-podzolic forest soil resulted in unproductive losses of Mg, i.e., with increasing dolomite dose, the losses of Mg increased.

Leaching characteristics of electrochemically precipitated struvite compared to other common phosphorus fertilizers in differing soils

“…Gransee and Führs (2013) reported that exchangeable Mg is readily mobile in the soil in comparison to other cations and is greatly influenced by the presence of Ca, K, and NH 4 . Being weakly bound to silicate clay minerals as well as SOM, soil solution Mg concentrations tend to be larger than that of other cations and increase with the addition of Ca 2+ and K + (Adomaitis et al., 2013; Litvinovich et al., 2021; Mikkelsen, 2011). The enhanced mobility of Mg in neutral to acidic soil, which characterizes the soils used in this study, tends to limit Mg retention (Yan & Hou, 2018).…”

“…Ca is known to be a largely migratory element in water which is a function of Ca's large ionic radius that limits Ca from forming non‐exchangeable, Ca‐containing crystal lattices with other minerals, particularly under acidic soil conditions, such as those characterizing the soils used in this study (Table 1), thus rendering Ca to be highly leachable in humid environments with excess rainfall (Adomaitis et al., 2013; Litvinovich et al., 2021). Similar to the observations in this study, where leachate Ca had a generally inverse relationship with leachate NH 4 + , Adomaitis et al.…”

“…After 7 weeks of incubation and thereafter, leachate-Ca concentration changes in all soils were similar to one another and similar to a change of zero relative to their respective UC treatments (Figure 5). Ca is known to be a largely migratory element in water which is a function of Ca's large ionic radius that limits Ca from forming non-exchangeable, Ca-containing crystal lattices with other minerals, particularly under acidic soil conditions, such as those characterizing the soils used in this study (Table 1), thus rendering Ca to be highly leachable in humid environments with excess rainfall (Adomaitis et al, 2013;Litvinovich et al, 2021)…”

Impact of dolomite rock waste on soil acidity and absorption of Ca and Mg by barley and wheat

“…Over the past 10 years, negative changes in the quality of agricultural land are mainly caused by a significant reduction in the use of all types of fertilizers and liming (Polyakov et al, 2022). Extensive researches are devoted to various aspects of the liming of acidic soils (Danilov;Yakovleva;Nikolaeva, 2020;Islam et al, 2021;Kamprath;Smyth, 2005;Lavrishchev et al, 2020;Litvinovich et al, 2021aLitvinovich et al, , 2021bMohammed;Aman;Zewide, 2021;Nebolsin;Nebolsina, 2010;Opala, 2017). One of the problems of reclamation of acid soils is that most liming materials are quickly depleted in this soil due to leaching and fixation of cations (Lavrishchev et al, 2020;Rashid et al, 2021;Xu et al, 2022).…”

90 Years of Agrophysical Institute as a History of Priority Achievements in Russian and World Agrophysical Science

“…Так, в Меньковском филиале АФИ создана многоуровневая система полевых экспериментов, которая служит методической базой для масштабных фундаментальных и прикладных исследований (60). Благодаря ей с использованием новых методических подходов были существенно развиты фундаментальные и прикладные основы точных систем удобрения посевов (61,62), методология фитосанитарного мониторинга и прикладные аспекты прецизионной интегрированной защиты растений (63,64), разработаны теоретические вопросы взаимодействия мелиорантов с почвой, исследованы адаптационные, агроэкологические и агроэкономические аспекты мелиорации и окультуривания дерново-подзолистых почв, в том числе на вторично осваиваемых сельскохозяйственных угодьях (60,62,65).…”