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بررسی تأثیر پر مرغ، ورمی کمپوست و هومات پتاسیم بر روی خصوصیات فیزیکی خاک | ||
آب و خاک | ||
مقاله 4، دوره 33، شماره 3 - شماره پیاپی 65، شهریور 1398، صفحه 417-430 اصل مقاله (1007.23 K) | ||
نوع مقاله: مقالات پژوهشی | ||
شناسه دیجیتال (DOI): 10.22067/jsw.v0i0.72579 | ||
نویسندگان | ||
محمدرضا دلالیان* ؛ فاطمه ذبیحی؛ انورالسادات پاک نژاد؛ مینا خوشخوان | ||
دانشگاه آزاد اسلامی- واحد تبریز | ||
چکیده | ||
یکی از راهکارهای اصلی بهبود شرایط فیزیکی خاکهای تحت کشت، اضافه کردن اصلاحکنندههای آلی و معدنی به خاک میباشد. این تحقیق با هدف بررسی تأثیر سه نوع ماده اصلاحی شامل هوماتپتاسیم، پرمرغ و ورمیکمپوست با درصدهای وزنی متفاوت بر روی خصوصیات فیزیکی خاک و در سطوح مختلف رطوبتی در شرایط مزرعه (تحت کشت گندم) اجراء گردید. طرح به صورت فاکتوریل در قالب طرح پایه بلوکهای کامل تصادفی در سه تکرار انجام شد. مواد اصلاحکننده به طور یکنواخت تا عمق 10 سانتیمتری با خاک مخلوط و تیمارهای رطوبتی اعمال شد. قبل و بعد از آزمایش از کرتها نمونهبرداری به عمل آمد. پارامترهای فیزیکی شامل: جرم مخصوص ظاهری (Bd)، رطوبتهای ظرفیت مزرعهای (FC) و نقطه پژمردگی دائم (PWP)، پایداری خاکدانههای مرطوب (WAS)، هدایت هیدرولیکی اشباع (KS)، مقاومت فروروی (PR)، شیب منحنی رطوبتی در نقطه عطف (Si)، میانگین وزنی قطر خاکدانهها (MWD) و بعد فراکتالی جرمی خاکدانهها (Dm) محاسبه گردید. نتایج نشان داد مصرف موادآلی موجب کاهش Bd (89%) و افزایش FC ،PWP (87% و 91% ) Ks و WAS (7/3 و 5/2 برابر) میگردد. با افزایش سطوح رطوبتی و مقدار مادهآلی بخصوص هوماتپتاسیم، میزان Si کاهش یافت (101%). PR با افزایش سطوح رطوبتی کاهش یافت. بر خلاف انتظار با افزایش میزان مادهآلی،Dm و MWD کاهش یافت. مواد آلی در زمانهای طولانیتر و در رطوبتهای بالا موجب بهبود پایداری خاکدانهها میگردد. با توجه به تأثیر مثبت مواد آلی بر بسیاری از پارامترهای فیزیکی خاک، این مواد بخصوص پرمرغ بعلت ارزانتر و دردسترس بودن، برای اصلاح خاکها پیشنهاد میگردد. | ||
کلیدواژهها | ||
پرمرغ؛ خصوصیات فیزیکی؛ گندم، مواد اصلاح کننده؛ ورمی کمپوست؛ هومات پتاسیم | ||
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