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اثر ریزجانداران حلکننده سیلیکات بر سینتیک آزادسازی پتاسیم از کانیهای پتاسیمدار | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 16، دوره 48، شماره 3، مهر 1396، صفحه 639-649 اصل مقاله (639.81 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2017.63449 | ||
| نویسندگان | ||
| ساناز اشرفی سعیدلو1؛ میرحسن رسولی صدقیانی* 2 | ||
| 1دانشگاه ارومیه-گروه علوم خاک | ||
| 2دانشکده کشاورزی دانشگاه ارومیه | ||
| چکیده | ||
| در این پژوهش بهمنظور مقایسه سینتیک رهاسازی پتاسیم از فلدسپار، ایلایت و فلوگوپایت در شرایط تلقیح میکروبهای حلکننده سیلیکاتها، آزمایشی بهصورت فاکتوریل در قالب طرح کاملاً تصادفی با 3 تکرار اجرا گردید. فاکتورهای آزمایش شامل تلقیح میکروبی (باکتری، قارچ و بدون تلقیح)، کانی پتاسیمی (فلدسپار، ایلایت و فلوگوپایت) و زمان انکوباسیون (1، 2، 4، 8، 12، 16، 24، 32، 48 و 64 ساعت) بودند. نتایج نشان داد که تلقیح میکروبی منجر به افزایش رهاسازی پتاسیم شد و پتاسیم محلول (Ksol) در نمونههای تلقیح یافته با باکتری و قارچ به‌ترتیب 3/92 و 8/92 درصد نسبت به نمونههای شاهد افزایش یافت. تأثیر نوع کانی بر سینتیک رهاسازی پتاسیم نیز معنادار بود، به‌طوریکه رهاسازی پتاسیم از فلوگوپایت در مقایسه با فلدسپار و ایلایت به‌ترتیب 11/1 و 13/1 برابر بیشتر بود. بیشترین کاهش pH و افزایش Ksol در تیمار تلقیح یافته با قارچ در حضور کانی فلوگوپایت مشاهده شد، به‌طوریکه pH در این تیمار 69/2 واحد نسبت به شاهد (بدون تلقیح) کاهش و Ksol 38/7 واحد در مقایسه با شاهد افزایش یافت. در بین معادلات سینتیکی برازش داده شده، با توجه به مقادیر R2 و SEE سینتیک رهاسازی پتاسیم توسط معادلات ایلوویچ، تابع توانی، مرتبه اول و پخشیدگی سهموی به خوبی توصیف شد. در بین این چهار معادله، معادله تابع توانی به‌عنوان بهترین مدل برای برازش دادهها تشخیص داده شد. همبستگی معنادار و معکوسی (***83/0- r=) بین Ksol و pH نیز مشاهده گردید. به‌طورکلی حضور ریزجانداران حلکننده سیلیکات منجر به افزایش میزان رهاسازی پتاسیم از کانیهای پتاسیمدار میشود. | ||
| کلیدواژه‌ها | ||
| تلقیح میکروبی؛ فلدسپار؛ مدل سینتیکی؛ برهمکنش میکروب-کانی؛ پتاسیم | ||
| عنوان مقاله [English] | ||
| The role of silicate-solubilizing microorganisms on potassium release kinetics from K-bearing minerals | ||
| نویسندگان [English] | ||
| Sanaz Ashrafi Saeidloo1؛ MirHasan Rasouli Sadaghiani2 | ||
| 1Urmia University | ||
| 2Urmia University | ||
| چکیده [English] | ||
| In this study a factorial experiment in a completely randomized design performed in order to compare the kinetics of potassium (K) release from feldspar, illite and phlogopite in presence of microbial inoculation. The first factor involved microbial inoculation (bacteria, fungi and control), the second factor was K mineral types (feldspar, illite and phlogopite) and the third factor was incubation time (1, 2, 4, 8, 12, 16, 24, 32, 48, and 64 hours). The results showed that microbial inoculation caused an increase in potassium release and soluble-K (Ksol) which in samples inoculated with bacteria and fungi increased 92.3 and 92.8 percent in comparison to control, respectively. Mineral type showed significant impact on the kinetics of potassium release, potassium release from phlogopite was 1.11 and 1.13 times higher than feldspar and illite, respectively. The maximum reduction of pH and the highest increase of soluble-K, was observed in phlogopite treatment which was inoculated with fungi. pH amount in this treatment was decreased 2.69 unit and Ksol was increased 7.38 unit compared to the control. Among the kinetic models which were fitted, according to R2 and SEE, kinetics of potassium release was described with ellovich, power function, first order and parabolic diffusion equations satisfactorily. Among these four equations, the power function equation was detected as the best model for data fitting. Significantly inverse correlation (r = -0.83**) was observed between Ksol and pH. Therefore, the presence of silicate solubilizing microorganisms increase the rate of potassium release from K- bearing minerals. | ||
| کلیدواژه‌ها [English] | ||
| Feldspar, Kinetics model, Microbe-mineral interaction, potassium | ||
| مراجع | ||
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