Proton Binding to Humic Acids from Organic Amendments and Amended Soils by the NICA-Donnan Model

2005 ◽  
Vol 39 (17) ◽  
pp. 6692-6697 ◽  
Author(s):  
César Plaza ◽  
Gennaro Brunetti ◽  
Nicola Senesi ◽  
Alfredo Polo
Keyword(s):  
Humic Acids ◽  
Organic Amendments ◽  
Proton Binding ◽  
Amended Soils ◽  
Donnan Model

scholarly journals Combined organic amendment effects on eggplant yield, soil fertility characteristics and humic acid quality

1969 ◽  
Vol 100 (2) ◽  
pp. 101-122
Author(s):  
Ian C. Pagán-Roig ◽  
Joaquín A. Chong ◽  
José A. Dumas ◽  
Consuelo Estévez de Jensen
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Soil Fertility ◽  
Humic Acids ◽  
Organic Amendments ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
Agricultural System ◽  
Vegetable Production ◽  
Amended Soils

Soil fertility and organic matter have been hindered due to unsustainable agricultural practices. There is a need to develop and better understand the effect of combined organic amendments that have the potential to increase soil fertility and agricultural system sustainability. Compost incorporations, the use of coordinated fallows and other biological amendments are alternatives to better the soil and increase crop yield. Information is scarce about the effect of combined organic amendments over soil chemical properties and their impact on vegetable production. The objective of the present study was to assess the effect of a combination of organic amendments we termed soil treatment management cycles (STMC) on soil chemical properties and eggplant yield in a San Antón soil. The STMC amendments consisted of incorporating organic matter from coffee pulp compost, planting and incorporation of a mixture of four green manure species, adding a mycorrhizae culture to the soil as well as compost tea. The different STMC were: control, no STMC (CL0); one STMC (CL1); two consecutive STMC (CL2); and three consecutive STMC (CL3). Results showed that CL1 was enough to significantly increase organic matter, P, K and S content in the soil compared with the non-amended soil. The concentration of Ca was significantly increased by three (CL3), and that of Mg by three (CL3) and two (CL2) STMC, compared to the other treatments. All treatments significantly changed soil pH, buffering it toward neutrality with increasing cycles when compared with pH 7.9 of no STMC control soils. Treatments CL1, CL2 and CL3 increased humic acid content 2.8, 3.8 and 5.9 times, respectively, when compared with CL0. Humic acids, extracted from unamended soils exhibited more condensation and more aromaticity when compared with those of amended soils. Nevertheless, the humic acids of amended soils showed high levels of polymerization. The enhancement in soil properties promoted by STMC resulted in an increase in eggplant fruit yield and biomass production.

ADSORPTION OF ALACHLOR BY HUMIC ACIDS FROM SEWAGE SLUDGE AND AMENDED AND NON-AMENDED SOILS

Soil Science ◽  
1994 ◽  
Vol 157 (3) ◽  
pp. 176-184 ◽  
Author(s):  
NICOLA SENESI ◽  
GENNARO BRUNETTI ◽  
PAOLO LA CAVA ◽  
TEODORO M. MIANO
Keyword(s):  
Sewage Sludge ◽  
Humic Acids ◽  
Amended Soils

scholarly journals Characterization of humic acids extracted from biosolid amended soils

2014 ◽  
pp. 0-0
Author(s):  
M Antilén ◽  
K Silva ◽  
S Acevedo ◽  
F Amiama ◽  
M Faúndez ◽  
...  
Keyword(s):  
Humic Acids ◽  
Amended Soils

Proton Binding by Humic and Fulvic Acids from Pig Slurry and Amended Soils

2005 ◽  
Vol 34 (3) ◽  
pp. 1131-1137 ◽  
Author(s):  
César Plaza ◽  
Juan C. García-Gil ◽  
Alfredo Polo ◽  
Nicola Senesi ◽  
Gennaro Brunetti
Keyword(s):  
Fulvic Acids ◽  
Pig Slurry ◽  
Humic And Fulvic Acids ◽  
Proton Binding ◽  
Amended Soils

Proton Binding by Groundwater Fulvic Acids of Different Age, Origins, and Structure Modeled with the Model V and NICA−Donnan Model

1998 ◽  
Vol 32 (21) ◽  
pp. 3346-3355 ◽  
Author(s):  
Jette B. Christensen ◽  
Edward Tipping ◽  
David G. Kinniburgh ◽  
Christian Grøn ◽  
Thomas H. Christensen
Keyword(s):  
Fulvic Acids ◽  
Proton Binding ◽  
Donnan Model

scholarly journals Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

Agronomy ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1166
Author(s):  
María José Carpio ◽  
Carlos García-Delgado ◽  
Jesús María Marín-Benito ◽  
María Jesús Sánchez-Martín ◽  
María Sonia Rodríguez-Cruz
Keyword(s):  
Microbial Community ◽  
Microbial Biomass ◽  
Microbial Activity ◽  
Soil Microbial Community ◽  
Organic Amendments ◽  
Herbicide Application ◽  
Amended Soils ◽  
Soil Microbial ◽  
Unamended Soil ◽  
Over Time

The soil microbial activity, biomass and structure were evaluated in an unamended (S) and organically amended soil treated with two commercial formulations of the herbicides chlorotoluron (Erturon®) and flufenacet plus diflufenican (Herold®) under field conditions. Soils were amended with spent mushroom substrate (SMS) or green compost (GC). Soil microbial dehydrogenase activity (DHA), biomass and structure determined by the phospholipid fatty acid (PLFA) profiles were recorded at 0, 45, 145, 229 and 339 days after herbicide treatment. The soil DHA values steadily decreased over time in the unamended soil treated with the herbicides, while microbial activity was constant in the amended soils. The amended soils recorded higher values of concentrations of PLFAs. Total soil microbial biomass decreased over time regardless of the organic amendment or the herbicide. Herbicide application sharply decreased the microbial population, with a significant modification of the microbial structure in the unamended soil. In contrast, no significant differences in microbial biomass and structure were detected in S + SMS and S + GC, untreated or treated with herbicides. The application of SMS and GC led to a significant shift in the soil microbial community regardless of the herbicides. The use of SMS and GC as organic amendments had a certain buffer effect on soil DHA and microbial biomass and structure after herbicide application due to the higher adsorption capacity of herbicides by the amended soils.

Fe(II)-catalyzed transformation of Fe (hydr)oxides in particle-size soil organic matter fractions from amended agricultural soils

2020 ◽  
Author(s):  
Beatrice Giannetta ◽  
Ramona Balint ◽  
Daniel Said-Pullicino ◽  
César Plaza ◽  
Maria Martin ◽  
...  
Keyword(s):  
Particle Size ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Agricultural Soils ◽  
Solid Phase ◽  
Organic Amendments ◽  
Fine Sand ◽  
Organic C ◽  
Amended Soils ◽  
Mineral Transformations

<p>Redox-driven changes in Fe crystallinity and speciation may affect soil organic matter (SOM) stabilization and carbon (C) turnover, with consequent influence on global terrestrial soil organic carbon (SOC) cycling.<span> </span>Under reducing conditions, increasing concentrations of Fe(II) released in solution from the reductive dissolution of Fe (hydr)oxides may accelerate ferrihydrite transformation, although our understanding of the influence of SOM on these transformations is still lacking.<span> </span></p><p>Here, we evaluated abiotic Fe(II)-catalyzed mineralogical changes in Fe (hydr)oxides in bulk soils and size-fractionated SOM pools (for comparison, fine silt plus clay, FSi+Cl, and fine sand, FSa) of an agricultural soil, unamended or amended with biochar, municipal solid waste compost, and a combination of both.<span> </span></p><p>FSa fractions showed the most significant Fe(II)-catalyzed ferrihydrite transformations with the consequent production of well-ordered Fe oxides irrespective of soil amendment, with the only exception being the compost-amended soils. In contrast, poorly crystalline ferrihydrite still constituted <em>ca. </em>45% of the FSi+Cl fractions of amended soils, confirming the that the higher SOM content in this fraction inhibits atom exchange between aqueous Fe(II) and the solid phase. Building on our knowledge of Fe(II)-catalyzed mineralogical changes in simple systems, our results evidenced that the mechanisms of abiotic Fe mineral transformations in bulk soils depend on Fe mineralogy, organic C content and quality, and organo-mineral associations that exist across particle-size SOM pools. Our results underline that in the fine fractions the increase in SOM due to organic amendments can contribute to limiting abiotic Fe(II)-catalyzed ferrihydrite transformation, while coarser particle-size fractions represent an understudied pool of SOM subjected to Fe mineral transformations.<span> </span></p>

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