Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials
The paper is devoted to the development and performance testing of a soil conditioner based on leonardite humic substances (LHS) modified with 3-aminopropyltriethoxysilane (APTES). The modified HS were obtained by adding APTES to LHS solution at different mass ratios of LHS and APTES, followed by th...
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-01-01
|
| Series: | Agronomy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4395/11/1/150 |
| _version_ | 1797411507601932288 |
|---|---|
| author | Natalia A. Kulikova Alexander B. Volikov Olga I. Filippova Vladimir A. Kholodov Nadezhda V. Yaroslavtseva Yulian R. Farkhodov Anna V. Yudina Vitaly A. Roznyatovsky Yuri K. Grishin Oral T. Zhilkibayev Irina V. Perminova |
| author_facet | Natalia A. Kulikova Alexander B. Volikov Olga I. Filippova Vladimir A. Kholodov Nadezhda V. Yaroslavtseva Yulian R. Farkhodov Anna V. Yudina Vitaly A. Roznyatovsky Yuri K. Grishin Oral T. Zhilkibayev Irina V. Perminova |
| author_sort | Natalia A. Kulikova |
| collection | DOAJ |
| description | The paper is devoted to the development and performance testing of a soil conditioner based on leonardite humic substances (LHS) modified with 3-aminopropyltriethoxysilane (APTES). The modified HS were obtained by adding APTES to LHS solution at different mass ratios of LHS and APTES, followed by the investigation of siloxane structures using <sup>31</sup>Si NMR spectroscopy. The Urbic Technosol was used as a model soil. The size and amount of water-stable soil aggregates were estimated using wet sieving and laser diffraction, respectively. Toxicity was evaluated by monitoring microbial substrate-induced respiration (SIR) and seedling bioassay. Laboratory column experiments demonstrated an increase in water-stability of the 3–5 mm soil aggregates after LHS-APTES application. Field tests showed an increase in the average weighted diameter of micro aggregates (from 59 to 73 μm) and water-stable macroaggregates (from 1.6 to 2.9 mm) due to the LHS-APTES amendment. A substantial increase in SIR from 5 to 9 mg CO<sub>2</sub> (kg h)<sup>−1</sup> was detected. Better survival of seedlings was observed. The obtained beneficial results indicate that APTES-modified HS can be successfully used as a soil conditioner. The formation of extended siloxane networks was suggested as the main mechanism of the observed improvement in the structure of the amended soils. |
| first_indexed | 2024-03-09T04:47:03Z |
| format | Article |
| id | doaj.art-910b7d479e164f358def9373f410cdc2 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T04:47:03Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-910b7d479e164f358def9373f410cdc22023-12-03T13:14:28ZengMDPI AGAgronomy2073-43952021-01-0111115010.3390/agronomy11010150Modified Humic Substances as Soil Conditioners: Laboratory and Field TrialsNatalia A. Kulikova0Alexander B. Volikov1Olga I. Filippova2Vladimir A. Kholodov3Nadezhda V. Yaroslavtseva4Yulian R. Farkhodov5Anna V. Yudina6Vitaly A. Roznyatovsky7Yuri K. Grishin8Oral T. Zhilkibayev9Irina V. Perminova10Department of Soil Science, Lomonosov Moscow State University, Leninskiye Gory 1-12, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, RussiaDepartment of Soil Science, Lomonosov Moscow State University, Leninskiye Gory 1-12, 119991 Moscow, RussiaDokuchaev Soil Science Institute, Pyzhyovskiy Lane 7 Build. 2, 119017 Moscow, RussiaDokuchaev Soil Science Institute, Pyzhyovskiy Lane 7 Build. 2, 119017 Moscow, RussiaDepartment of Soil Science, Lomonosov Moscow State University, Leninskiye Gory 1-12, 119991 Moscow, RussiaDokuchaev Soil Science Institute, Pyzhyovskiy Lane 7 Build. 2, 119017 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, RussiaDepartment of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, RussiaDepartment of Chemistry, Al Farabi Kazakh National University, 71 al-Farabi Ave., Almaty 050040, KazakhstanDepartment of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1-3, 119991 Moscow, RussiaThe paper is devoted to the development and performance testing of a soil conditioner based on leonardite humic substances (LHS) modified with 3-aminopropyltriethoxysilane (APTES). The modified HS were obtained by adding APTES to LHS solution at different mass ratios of LHS and APTES, followed by the investigation of siloxane structures using <sup>31</sup>Si NMR spectroscopy. The Urbic Technosol was used as a model soil. The size and amount of water-stable soil aggregates were estimated using wet sieving and laser diffraction, respectively. Toxicity was evaluated by monitoring microbial substrate-induced respiration (SIR) and seedling bioassay. Laboratory column experiments demonstrated an increase in water-stability of the 3–5 mm soil aggregates after LHS-APTES application. Field tests showed an increase in the average weighted diameter of micro aggregates (from 59 to 73 μm) and water-stable macroaggregates (from 1.6 to 2.9 mm) due to the LHS-APTES amendment. A substantial increase in SIR from 5 to 9 mg CO<sub>2</sub> (kg h)<sup>−1</sup> was detected. Better survival of seedlings was observed. The obtained beneficial results indicate that APTES-modified HS can be successfully used as a soil conditioner. The formation of extended siloxane networks was suggested as the main mechanism of the observed improvement in the structure of the amended soils.https://www.mdpi.com/2073-4395/11/1/150water-stable aggregatesoil structuresiloxanepolyelectrolyte complexesUrbic Technosol |
| spellingShingle | Natalia A. Kulikova Alexander B. Volikov Olga I. Filippova Vladimir A. Kholodov Nadezhda V. Yaroslavtseva Yulian R. Farkhodov Anna V. Yudina Vitaly A. Roznyatovsky Yuri K. Grishin Oral T. Zhilkibayev Irina V. Perminova Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials Agronomy water-stable aggregate soil structure siloxane polyelectrolyte complexes Urbic Technosol |
| title | Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials |
| title_full | Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials |
| title_fullStr | Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials |
| title_full_unstemmed | Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials |
| title_short | Modified Humic Substances as Soil Conditioners: Laboratory and Field Trials |
| title_sort | modified humic substances as soil conditioners laboratory and field trials |
| topic | water-stable aggregate soil structure siloxane polyelectrolyte complexes Urbic Technosol |
| url | https://www.mdpi.com/2073-4395/11/1/150 |
| work_keys_str_mv | AT nataliaakulikova modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT alexanderbvolikov modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT olgaifilippova modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT vladimirakholodov modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT nadezhdavyaroslavtseva modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT yulianrfarkhodov modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT annavyudina modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT vitalyaroznyatovsky modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT yurikgrishin modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT oraltzhilkibayev modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials AT irinavperminova modifiedhumicsubstancesassoilconditionerslaboratoryandfieldtrials |