Biology BulletinBiology BulletinИзвестия Российской академии наук. Серия биологическая1026-34703034-5367The Russian Academy of Sciences68763610.31857/S1026347025040086ECOLOGYЭКОЛОГИЯResearch ArticleThe content of nitrogen, phosphorus in cereals and dicot grasses leaves and features of their rhizosphere microflora in multi-age fly ash dumpsСодержание азота, фосфора в листьях злаков и двудольных трав и особенности их ризосферной микрофлоры на разновозрастных золоотвалахBetekhtinaA. A.БетехтинаА. А.
Russian Federation
a.a.betekhtina@urfu.ruNekrasovaO. A.НекрасоваО. А.
Russian Federation
a.a.betekhtina@urfu.ruMalakheevaA. V.МалахееваА. В.
Russian Federation
a.a.betekhtina@urfu.ruVoropaevaO. V.ВоропаеваО. В.
Russian Federation
a.a.betekhtina@urfu.ruMalevaM. G.МалеваМ. Г.
Russian Federation
a.a.betekhtina@urfu.ruUral Federal University named after the first President of Russia B. N. YeltsinФГАОУ ВО Уральский федеральный университет им. первого Президента России Б.Н. Ельцина0408202544434541607202516072025Copyright ©; 2025, Russian Academy of SciencesCopyright ©; 2025, Российская академия наук2025Russian Academy of SciencesРоссийская академия наукhttps://medjrf.com/1026-3470/article/view/687636

The nitrogen (N) and phosphorus (P) content was studied in the leaves of 6 cereals and 18 non-legume dicotyledonous grass species, as well as directly in the substrates of non-recultivated areas of two different age fly ash dumps. The total number of microorganisms and nitrogen fixers capable of phosphate solubilization and indole-3-acetic acid (IAA) synthesis was analyzed in the rhizosphere of two pioneer (Alopecurus aequalis, Ranunculus sceleratus) and two late successional (Poa pratensis, R. auricomus) plant species. Higher N and P content and lower N/P ratio were found in the leaves of dicot grasses compared to cereals. The number of nitrogen fixers in the rhizosphere of dicots was higher, which coincided with the higher content of total nitrogen in it. The proportion of nitrogen fixers with an increased ability to phosphate solubilize and IAA produce was significantly higher in the early stages of ash dump overgrowth.

Исследовано содержание азота (N) и фосфора (P) в листьях 6 видов злаков и 18 видов небобовых двудольных трав, а также непосредственно в субстратах нерекультивированных участков двух разновозрастных золоотвалов. Проанализировано общее количество микроорганизмов и азотфиксаторов, способных к фосфатсолюбилизации и синтезу индолил-3-уксусной кислоты (ИУК) в ризосфере двух пионерных (Alopecurus aequalis, Ranunculus sceleratus) и двух позднесукцессионных (Poa pratensis, R. auricomus) видов растений. Обнаружено более высокое содержание N и P и более низкое соотношение N/P в листьях двудольных трав по сравнению со злаками. Численность азотфиксаторов в ризосфере двудольных была выше, что совпадало с более высоким содержанием в ней общего азота. Доля азотфиксаторов, обладающих повышенной способностью к солюбилизации фосфатов и продукции ИУК, была существенно больше на ранних этапах зарастания золоотвала.

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