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تأثیر پلیمر سوپر جاذب بلور آب A، پرلیت و زئولیت بر ویژگیهای فیزیکی خاک لوم شنی | ||
تحقیقات آب و خاک ایران | ||
مقاله 15، دوره 50، شماره 5، مهر 1398، صفحه 1219-1230 اصل مقاله (957.87 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2018.263434.667987 | ||
نویسندگان | ||
مرضیه مرادیان1؛ عباس ملکی* 2؛ افسانه عالی نژادیان بیدآبادی3 | ||
1گروه آب، دانشکده کشاورزی دانشگاه لرستان | ||
2گروه آب، دانشکده کشاورزی، دانشگاه لرستان | ||
3گروه علوم و مهندسی خاک، دانشکده کشاورزی و منابع طبیعی دانشگاه لرستان، خرم آباد، ایران | ||
چکیده | ||
یکی از راهکارهای افزایش بازده آبیاری در مناطق خشک و نیمهخشک استفاده از اصلاحکنندههای خاک است. تحقیق حاضر با هدف تأثیر سطوح مختلف پلیمر سوپر جاذب بلور آب A، پرلیت و زئولیت بر ویژگیهای فیزیکی خاک لوم-شنی، در قالب آزمایش فاکتوریل با طرح بلوکهای کامل تصادفی با سه نوع مادهی اصلاحی پلیمر سوپر جاذب A، پرلیت و زئولیت در پنج سطح (صفر، 5/0، 1، 5/1، و 2 گرم در کیلوگرم خاک) در چهار تکرار اجرا شد. رطوبت خاک در مکشهای 10 تا 1500 کیلو پاسکال در 7 مکش تعیین شد. نتایج پژوهش نشان داد در بین اصلاحکنندهها، پلیمر سوپر جاذب در سطح ۲ گرم در کیلوگرم در مقایسه با تیمار شاهد به ترتیب سبب افزایش تخلخل خاک، میانگین وزنی قطر خاکدانهها و آب قابل استفاده گیاه به میزان 6/2 ،71/2 و 40/1 برابر و کاهش 82/0 برابر جرم مخصوص ظاهری خاک شد. همچنین نتایج نشان داد که در همهی مکشها در تمام تیمارهای آزمایشی، میزان رطوبت نگهداری شده در خاک بهطور معنیداری نسبت به شاهد افزایش یافت. | ||
کلیدواژهها | ||
آب قابل استفاده گیاه؛ تخلخل؛ جرم مخصوص ظاهری؛ منحنی رطوبتی خاک | ||
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