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بررسی تأثیر بیوچار فعالشده و هیدروچار حاصل از جلبکChlorella vulgaris بر ویژگیهای زیستی و آنزیمی خاک | ||
| تحقیقات آب و خاک ایران | ||
| دوره 56، شماره 9، آذر 1404، صفحه 2613-2637 اصل مقاله (2.02 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2025.399702.669988 | ||
| نویسندگان | ||
| جعفر صوفیان1؛ محمد بابااکبری* 1؛ آرمن آوانس2؛ صلاح الدین مرادی3 | ||
| 1گروه علوم خاک، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران | ||
| 2گروه شیمی، دانشکده علوم پایه، دانشگاه مراغه، آذربایجان شرقی، ایران | ||
| 3گروه کشاورزی، دانشگاه پیام نور تهران، تهران، ایران | ||
| چکیده | ||
| میکروارگانیسمهای خاک نقش حیاتی در چرخه عناصر غذایی و فرآیندهای بیوشیمیایی ایفا میکنند و فعالیت آنها تا حد زیادی به در دسترس بودن منابع کربنی بستگی دارد. در این مطالعه، تأثیر بیوچار فعالشده و هیدروچار حاصل از جلبک Chlorella vulgaris در دو غلظت 5/0 و ۱ درصد بر ویژگیهای زیستی خاک و فعالیت آنزیمی مورد بررسی قرار گرفت. این آزمایش شامل سه بخش (1) اندازهگیری تنفس میکروبی طی ۹۰ روز، (2) بررسی pH خاک و جمعیتهای میکروبی طی 84 روز و (3) ارزیابی فعالیت آنزیمها (آلکالین فسفاتاز، اسید فسفاتاز، آریلسولفاتاز، -βگلوکوزیداز، اینورتاز، پروتئاز و دهیدروژناز) و ویژگیهای میکروبی در پایان هفته دوازدهم بود. تنفس میکروبی در تیمارهای بیوچار با مقدار 33/315 میلیگرم دیاکسیدکربن در هر کیلوگرم خاک خشک در روز آغاز شد و تا روز یازدهم کاهش شدید و پس از آن کاهش تدریجی داشت. فعالیت آنزیم آریلسولفاتاز در تیمار 5/0 درصد هیدروچار بیشترین مقدار (۲۸۶ میکروگرم PNP در هر گرم خاک در ساعت) و در تیمار شاهد کمترین مقدار (۱۶۶ میکروگرم PNP در هر گرم خاک در ساعت) را نشان داد. در تیمار هیدروچار،pH خاک ابتدا افزایش یافت، در حالیکه در تیمار بیوچار در پایان کاهش نشان داد. هر دو تیمار موجب افزایش کربن و فعالیت آنزیمی زیستتوده میکروبی شدند، اما تأثیر هیدروچار چشمگیرتر بود. این نتایج نشان میدهند که هیدروچار میتواند به عنوان اصلاحکنندهای مؤثرتر نسبت به بیوچار در بهبود فعالیت آنزیمی، تنوع میکروبی و تنفس میکروبی خاک مورد استفاده قرار گیرد. | ||
| کلیدواژهها | ||
| اریلسولفاتاز؛ اصلاحکننده خاک؛ اینورتاز؛ تنفس میکروبی؛ میکروارگانیسمهای خاک | ||
| مراجع | ||
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