This study investigated the nitrogen fixation activity of the aquatic plant Azolla caroliniana in different nutrientmedia (D and W) under the influence of various concentrations of hexavalent chromium (Cr⁶⁺). During the experiments,biomass production, growth dynamics, and nitrogen fixation activity of Azolla were evaluated using the acetylenereduction method. The results showed that in chromium-free nutrient media, nitrogen fixation activity gradually increasedover 10–30 days and exhibited a declining trend after day 35. Nitrogen fixation activity in the W-type nutrient medium washigher compared to the D medium. Although increasing chromium concentrations significantly reduced nitrogen fixationactivity, the process did not completely cease even at high concentrations (3 mg/L). The results indicate that Azollacaroliniana is a relatively stable biological object in water environments contaminated with heavy metals.
| Mualliflar | Sh. Azimov, E. Egamberdiev, S. Turabdajanov |
|---|---|
| Jurnal | Муҳандислик ва Иқтисодиёт |
| Nashriyot | Плеханов номидаги Россия иқтисодиёти университетининг Тошкент шаҳридаги филиали |
| ISSN | 3060-463X, 3060-463X |
| Nashr sanasi | 2026-01-01 |
| Jild | 4 |
| Son | 1 |
| Til | Ingliz |
| Indeksga qo‘shilgan | 2026-08-26 |
Azolla caroliniana, nitrogen fixation, chromium (Cr⁶⁺), nutrient medium, biomass, acetylene reduction method, Anabaena azollae.
| APA | Sh. Azimov, E. Egamberdiev, & S. Turabdajanov (2026). NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺). Муҳандислик ва Иқтисодиёт, 4(1). https://muhandislik-iqtisodiyot.uz/index.php/journal/article/view/1908 |
|---|---|
| GOST (OAK) | Sh. Azimov, E. Egamberdiev, S. Turabdajanov NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺) // Муҳандислик ва Иқтисодиёт. – 2026. – T. 4, № 1. |
| MLA | Sh. Azimov, E. Egamberdiev, and S. Turabdajanov. “NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺).” Муҳандислик ва Иқтисодиёт, 4(1), 2026. https://muhandislik-iqtisodiyot.uz/index.php/journal/article/view/1908 |
| Chicago | Sh. Azimov, E. Egamberdiev, and S. Turabdajanov. “NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺).” Муҳандислик ва Иқтисодиёт, 4(1) (2026). https://muhandislik-iqtisodiyot.uz/index.php/journal/article/view/1908 |
| Harvard | Sh. Azimov, E. Egamberdiev, and S. Turabdajanov (2026) ‘NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺)’, Муҳандислик ва Иқтисодиёт, 4(1). https://muhandislik-iqtisodiyot.uz/index.php/journal/article/view/1908 |
| BibTeX | @article{shazimov2026,
title = {NITROGEN FIXATION CHARACTERISTICS OF AZOLLA CAROLINIANA UNDER THE INFLUENCE OF HEAVY METAL (CR⁶⁺)},
author = {Sh. Azimov and E. Egamberdiev and S. Turabdajanov},
journal = {Муҳандислик ва Иқтисодиёт},
year = {2026},
volume = {4},
number = {1},
url = {https://muhandislik-iqtisodiyot.uz/index.php/journal/article/view/1908}
} |
Boshqa maqola uchun iqtibos tayyorlash
Mazkur tadqiqotda muqobil energiya vositalarini joriy etish holatining statistik tahlili amalga oshirilgan.Tadqiqotning asosiy maqsadi qishloq hududlarida muqobil energiya manbalaridan foydalanish ko‘lamini, ularning…
Mazkur maqolada O‘zbekiston oliy ta’lim muassasalarida faoliyat yuritayotgan axborot-resurs markazlarining(ARM) strategik boshqaruv masalalari tadqiq etilgan. Amaldagi boshqaruv amaliyotini tahlil qilish asosida…
Ushbu maqolada ESG (Environmental, Social, Governance) konsepsiyasining mohiyati hamda uningmehmonxona sanoatidagi ahamiyati ilmiy adabiyotlar asosida tahlil qilinadi. Tadqiqotning asosiy maqsadi ESGtamoyillarining…
Mazkur ilmiy maqolada davlat-xususiy sheriklik (DXSh) mexanizmlaridan foydalanish orqali hududlarninginvestitsiyaviy jozibadorligini oshirish hamda xorijiy investitsiyalarni jalb etish masalalari tizimli ravishda tadqiq…
Ushbu maqolada mintaqa iqtisodiyotining barqaror rivojlanishida tadbirkorlik faoliyati samaradorligining roliempirik jihatdan tahlil qilinadi. Xorazm viloyatida 2019–2024-yillar davomida yalpi hududiy mahsulot (YaHM)…
Mazkur maqolada ekologik tadbirkorlikni rivojlantirishda davlat siyosati hamda normativ-huquqiy tartibgasolish mexanizmlarining iqtisodiy, institutsional va ijtimoiy ta’siri kompleks tarzda tahlil qilinadi. Tadqiqotda…
Maqolada korporativ boshqaruv tizimida ESG (Environmental-Social-Governance) tamoyillari hamda ularningtashkilot samaradorligiga ta’siri tahlil qilinadi. ESG standartlarini joriy etish orqali kompaniyalarning barqaror…
Ushbu maqolada O‘zbekiston sanoatining hozirgi holati hamda asosiy iqtisodiy ko‘rsatkichlarining so‘nggiyillardagi dinamikasi kompleks tahlil qilinadi. Tadqiqot jarayonida sanoatda amalga oshirilayotgan institutsional…
Ushbu maqolada soliq tizimini tahlil qilishda qo‘llaniladigan klassik va zamonaviy metodologik yondashuvlartadqiq etilgan. Soliq tizimi samaradorligini baholashda fiskal, iqtisodiy va ijtimoiy omillarning o‘zaro…
Maqolada meva-sabzavotchilik tarmog‘ining eksport salohiyatini rivojlantirish masalalari, xalqarostandartlarga mos organik mahsulotlar eksporti dinamik tahliliga to‘xtalib o‘tilgan, qishloq xo‘jaligining yetakchi…
Муҳандислик ва Иқтисодиёт — barcha maqolalar · 2026-yil arxivi