اثر پلیمر پلی‌وینیل‌استات بر تغییرات مقاومت سطحی خاک

نوع مقاله : پژوهشی

نویسندگان

1 استادیار گروه مهندسی آبخیزداری، دانشکده‌ی منابع طبیعی ساری، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

2 دانشجوی کارشناسی‌ارشد، گروه مهندسی آبخیزداری، داﻧﺸﮑﺪه‌ی منابع طبیعی ساری، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

3 دانشیار گروه مهندسی آبخیزداری، دانشکده‌ی منابع طبیعی ساری، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ایران

چکیده

امروزه یکی از مشکلات مهم جهان، فرسایش خاک است که سبب ﻛﺎﻫﺶ حاصل‌خیزی ﺧﺎﻙ، ﺍﻓﺰﺍﻳﺶ ﻏﻠﻈﺖ ﺭﺳﻮﺏ ﺩﺭ رودخانه‌ها و مخازن سدها میﺷﻮﺩ. پژوهش حاضر برای بررسی تغییرات مقاومت سطحی خاک با استفاده از پلیمرپلی‌وینیل‌استات با مقادیر 5، ۱۰، ۱۵، ۲۰ و ۲۵ میلی‌لیتر و اندازه‌ی کاربرد ۵، ۱۰، ۱۵ و ۲۵%، در شرایط آزﻣﺎﯾشگاهی و مقیاس کرت انجام داده شد. نتایج نشان داد که پلیمراستفاده‌شده می‌تواند مقاومت سطحی خاک را بیش‌تر از تیمار شاهد افزایش دهد. کاربرد پلیمربا غلظت ۲۵% و مقدار ۲۵ میلی‌لیتر در سطح 79/0 سانتی‌مترمربع بیشترین مقاومت سطحی خاک با مقدار ۳/۳ کیلوگرم بر سانتی‌مترمربع را به‌دنبال داشت. با توجه به نتایج به‌دست‌آمده و درنظرگرفتن هزینه‌ی اقتصادی (هر لیتر پلی‌وینیل‌استات 100000 ریال) غلظت ۱۵% می‌تواند مقدار بهینه برای افزایش مقاومت سطحی خاک دانسته شود. می‌توان نتیجه گرفت که پلیمراستفاده‌شده، علاوه‌بر افزایش مقاومت خاک سطحی ممکن است در حفاظت خاک و مهار فرسایش آبی مؤثر باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of polyvinyle acetate polymer on soil surface resistance variations

نویسندگان [English]

  • Leila Gholami 1
  • Zahra Haghjoo 2
  • Ataollah Kavian 3
1 Assistant Professor, Department of Watershed Management Engineering, Collage of Natural Resources, Sari of Agricultural Sciences and Natural Resources, Sari, Iran
2 M.Sc. Student, Department of Watershed Management Engineering, Collage of Natural Resources, Sari of Agricultural Sciences and Natural Resources, Sari, Iran
3 Associate Professor, Department of Watershed Management Engineering, Collage of Natural Resources, Sari of Agricultural Sciences and Natural Resources, Sari, Iran
چکیده [English]

One of the most important problems in the world nowadays is the soil erosion, which reduces soil fertility, increases sediment concentration in rivers and dam’s reservoirs. For this purpose, the present study was conducted to investigate soil surface resistance changes using a polyvinyl acetate polymer with rates of 5, 10, 15, 20 and 25 ml and application concentrations of 5, 10, 15, 20, 25 percent in laboratory conditions and plot scale. The polymer application with a concentration of 25 percent and a rate of 25 ml in the level of 0.79 m2 had the most soil surface resistance with a rate of 3.3 kg cm-2. According to the obtained results and the economic cost (each litre of polyvinyl acetate of 100000 Rials) can state that the level of 15 percent can be selected as an optimum level for increasing soil surface resistance. With regard to the results it can be concluded that the used polymer in addition to the increasing soil surface resistance can have an effect on the soil conservation and control of water erosion.

کلیدواژه‌ها [English]

  • Inorganic Amendments
  • Laboratory Conditions
  • Rainfall Simulation
  • Soil Surface Resistance
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