بررسی سطوح مختلف عمق و شدت پادلینگ بر خواص مهندسی خاک لومی رسی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه ماشینهای کشاورزی دانشکده کشاورزی سنقر

2 گروه مکانیک واحد الیگودرز، دانشگاه آزاد اسلامی الیگودرز، ایران

3 عضو هیئت علمی/گروه مهندسی مکانیک بیوسیستم، دانشکده مهندسی زراعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

خصوصیات مهندسی خاک در کنار خواص شیمیایی و بیولوژیکی می­توانند وسیله­ای برای توجیه رفتار خاک باشند. در این تحقیق، جرم مخصوص ظاهری خاک، رسانایی هیدرولیکی، مقاومت به نفوذ و مقاومت برشی تحت تاثیر سطوح مختلف عمق و پادلینگ با استفاده از آزمایش فاکتوریل در قالب طرح کاملاً تصادفی در سه تکرار اندازه‌گیری گردید. نتایج نشان داد جرم مخصوص ظاهری خاک، مقاومت به نفوذ، مقاومت برشی و رسانایی هیدرولیکی با افزایش سطح پادلینگ کاهش و با افزایش عمق همه به غیر از رسانایی هیدرولیکی، افزایش یافتند. رنج تغییرات جرم مخصوص ظاهری(gr/cm3 32/1- 68/0) بود. کمترین و بیشترین رسانایی هیدرولیکیm/s 5/8 و 3/ 0بود که به ترتیب در تیمار P0 در عمق 10 سانتی­متری و تیمار P2 در عمق 30 سانتی­متری گزارش شدند. می­توان گفت تیمار پادلینگ P1 برای حفظ رطوبت، کاهش تخریب خواص فیزیکی، مکانیکی خاک و کاهش انرژی مورد نیاز برای آماده سازی اراضی شالیزاری مناسب‌تر از تیمار P2 می­باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effect of Depth and Puddling Intensity on Engineering Properties of Clay Loam Soil

نویسندگان [English]

  • nahid aghilinategh 1
  • mahtab rezaei 2
  • Reza Tabatabaei kolor 3
1 Department of Agricultural Machinery Engineering, Sonqor Agriculture Faculty, Razi University, Kermanshah, Iran
2 1- Department of Mechanic, Aligoudarz, Branch, Islamic Azad University, Aligoudarz, Iran
3 Scientific member/Department of Mechanics of Biosystems Engineering, Faculty of Crop Engineering, Sari University of Agricultural Sciences and Natural Resources
چکیده [English]

Engineering properties of soils besides the chemical and biological properties can be a tool for justifying the behavior of soil. In this study bulk density, hydraulic conductivity, soil penetration resistance and Shear strength were measured. Different levels of depth and puddling intensity and their interactions on the properties in randomized complete design with three replications in a factorial experiment was investigated. Results indicated puddling intensity decreased the soil hydraulic conductivity, bulk density, penetration resistance, shear strength and with increasing depth, bulk density, penetration resistance and shear strength increased. The changes in bulk density were 0.68-1.32. The highest and lowest hydraulic conductivity were reported 0.3 and 8.5 in treatment P0 depth 10 cm and treatment P2 depth 30 cm respectively. It can be said that puddling treatment P1 is more suitable than treatment P2 to keep moisture, reduce physical and mechanical damage, energy required to prepare the paddy fields.

کلیدواژه‌ها [English]

  • Hydraulic conductivity
  • Bulk density
  • penetration resistance
  • puddling
  • shear strength
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