esoilБюллетень Почвенного института имени В.В. ДокучаеваDokuchaev Soil Bulletin0136-16942312-4202V.V. Dokuchaev Soil Science Institute10.19047/0136-1694-2024-SPYC-73-104esoil-842Research ArticleСпецвыпуск по результатам молодежной конференцииSpecial Issue "Selected papers from Young Scientists Conference 2022"Влияние доступности почвенной влаги на свойства растворенного органического вещества и содержание микробного углерода в ризосфере Poa pratensis L.Influence of soil moisture availability on dissolved organic matter properties and microbial carbon content in Poa pratensis L. rhizospherehttps://orcid.org/0000-0003-1564-5365ДанилинИ. В.DanilinI. V.

Игорь Вячеславович Данилин - отдел биологии и биохимии почв, младший научный сотрудник.

119017, Москва, Пыжевский пер, 7, стр. 2

7 Bld. 2 Pyzhevskiy per., Moscow 119017

danilin.i@mail.ruХолодовВ. А.KholodovV. A.

Владимир Алексеевич Холодов

119017, Москва, Пыжевский пер, 7, стр. 2

7 Bld. 2 Pyzhevskiy per., Moscow 119017

vkholod@mail.ruЗиганшинаА. Р.ZiganshinaA. R.

Алия Рустамовна Зиганшина

119017, Москва, Пыжевский пер, 7, стр. 2

7 Bld. 2 Pyzhevskiy per., Moscow 119017

mpum6009@gmail.comДанченкоН. Н.DanchenkoN. A.

Наталья Николаевна Данченко

119017, Москва, Пыжевский пер, 7, стр. 2

 

7 Bld. 2 Pyzhevskiy per., Moscow 119017

nataly_danch@mail.ruБурякА. Д.BuriakA. D.

Анастасия Дмитриевна Буряк

119017, Москва, Пыжевский пер, 7, стр. 2

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poh.yolla@gmail.comФарходовЮ. Р.FarkhodovYu. R.

Юлиан Робертович Фарходов

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7 Bld. 2 Pyzhevskiy per., Moscow 119017

yulian.farkhodov@yandex.ruЯрославцеваН. В.YaroslavtsevaN. V.

Надежда Васильевна Ярославцева

119017, Москва, Пыжевский пер, 7, стр. 2

7 Bld. 2 Pyzhevskiy per., Moscow 119017

nadezhdayros@gmail.comФИЦ "Почвенный институт им. В.В. Докучаева"РоссияFederal Research Centre “V.V. Dokuchaev Soil Science Institute”Russian Federation20242511202400Специальный выпуск по материалам VII конференции молодых ученых “Почвоведение: Горизонты будущего. 2023"73104Copyright © Данилин И.В., Холодов В.А., Зиганшина А.Р., Данченко Н.Н., Буряк А.Д., Фарходов Ю.Р., Ярославцева Н.В., 20242024Данилин И.В., Холодов В.А., Зиганшина А.Р., Данченко Н.Н., Буряк А.Д., Фарходов Ю.Р., Ярославцева Н.В.Danilin I.V., Kholodov V.A., Ziganshina A.R., Danchenko N.A., Buriak A.D., Farkhodov Y.R., Yaroslavtseva N.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://bulletin.esoil.ru/jour/article/view/842

Цель работы заключалась в оценке изменения содержания микробного углерода и свойств растворенного органического вещества (РОВ) ризосферы мятлика полевого (Poa pratensis L.) в ответ на воздействие иссушения и переувлажнения почв. В работе использовали метод вегетационного эксперимента с вариантами без растений и со сплошным посевом в вегетационных сосудах на черноземе типичном (Haplic Chernozem). Свойства растворенного органического вещества оценивали на основании изучения водоэкстрагируемого органического вещества (ВЭОВ), для которого определяли оптические свойства методами UV-Vis спектрометрии и спектрофлуориметрии. Для оценки микробной биомассы почву фумигировали и проводили экстракцию водой. Показано, что содержание микробного углерода во внекорневом черноземе не зависит от влажности почвы, в то время как в ризосфере – увеличивается при иссушении и уменьшается при оптимальной и избыточной влажности. На свойства ВЭОВ внекорневого чернозема в большей степени влияет влажность почвы, а ризосферы – жизнедеятельность растения. Содержание микробного углерода в ризосфере больше, по сравнению с внекорневой почвой, только при иссушении, что связано с адаптацией растения к абиотическому стрессу. При оптимальном и избыточном увлажнении содержание микробного углерода во внекорневой почве больше, по сравнению с ризосферой, что может быть связано с более активной реакцией микроорганизмов чернозема на краткосрочное увлажнение, по сравнению с ризосферными микроорганизмами, а также регулирующим влиянием растения. Несмотря на меньшую микробную биомассу, по сравнению с внекорневой почвой, микробиом ризосферы мятлика способен на более интенсивную трансформацию органического вещества почвы. Динамичность свойств ризосферы мятлика обеспечивает ее более активное и устойчивое функционирование.

The goal of the work was to assess changes in microbial carbon content and the properties of dissolved organic matter (DOM) of the Poa pratensis L. rhizopshere in response to the effects of soil drying and waterlogging. The vegetation experiment without plants and with dense sowing in vegetative vessels on Haplic Chernozem surfacewas used in the work. The properties of dissolved organic matter were evaluated based on the study of water-extractable organic matter (WEOM), in which the optical properties were assessed by UV-Vis spectrophotometry and spectrofluorimetry. Soil microbial carbon content was assessed by fumigation method. It has been shown that microbial carbon content in the bulk Chernozem does not depend on soil moisture, while in the rhizosphere it increases with drying and decreases with optimal and excess moisture. Soil moisture greatly affects WEOM properties of the bulk Chernozem, whereas the rhizosphere properties are influenced by the activity of the plant. Despite the lower microbial biomass compared to the bulk soil, the microbiome of P. pratensis L. rhizosphere is capable of more intense transformation of soil organic matter. The dynamic properties of P. pratensis L. rhizosphere ensure its more active and sustainable functioning compared to bulk soil.

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The authors declare that there are no conflicts of interest present.