تأثیر قارچ آسپرژیلوس نایجر و کود سبز بر انحلال فسفر خاک در شرایط انکوباسیون

آب و خاک

مقاله 5، دوره 31، شماره 2 - شماره پیاپی 52، تیر 1396، صفحه 597-608   

نوع مقاله: مقالات پژوهشی

شناسه دیجیتال (DOI): 10.22067/jsw.v31i2.55407

نویسندگان

آزاده احسانی نژاد^* ؛ علی عباسپور؛ حمیدرضا اصغری؛ حمیدرضا صمدلویی

دانشگاه صنعتی شاهرود

چکیده

حل شدن فسفر خاک توسط ریز جانداران حل‌کننده فسفات و استفاده از مواد آلی در مدیریت حاصلخیزی خاک مناسب‌تر از کودهای شیمیایی است. به‌منظور بررسی اثر آسپرژیلوس نایجر و کود سبز بر فراهمی فسفر خاک آزمایشی به صورت فاکتوریل در قالب طرح بلوکهای کامل تصادفی با 10 تیمار و سه تکرار طی یک دوره 70 روزه و به صورت انکوباسیون انجام شد. تیمارهای آزمایشی عبارتند از: C: شاهد ، As: آسپرژیلوس نایجر ، A: کود سبز ، S: ساکارز ، P: سنگ فسفات، As+ A ، As+S ، As+P ، As+P +S ، As+P + A. پس از 70 روز pH ، هدایت الکتریکی، فسفر قابل جذب و محلول در خاک اندازه گیری شدند. نتایج نشان داد در طول زمان با به کارگیری تیمارها pH خاک کاهش و هدایت الکتریکی، فسفر محلول و فسفر قابل دسترس خاک افزایش یافته است. بیشترین فسفر محلول و قابل دسترس در تیمار As+P + A مشاهده شد بطوری که فسفر محلول را 58 درصد و فسفر قابل دسترس خاک را 43 درصد افزایش داد. نتایج حاصله مؤید آن است که استفاده از ریز جانداران حل کننده فسفات و مواد آلی می تواند موجب افزایش انحلال فسفر خاک گردد.

کلیدواژه‌ها

قارچ حل کننده فسفات؛ اسیدآلی؛ سنگ فسفات؛ فسفر؛ ماده آلی

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