طراحی و ساخت دستگاه اندازه‌گیری داده‌های محیطی خاک به ویژه رطوبت، دما و شوری با نام تجاری REC-P55

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار گروه مهندسی آب دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

2 دانش آموخته کارشناسی علوم و مهندسی آب، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

در دهه‌های آتی، عمده کشور‌های جهان به جهت رشد لجام گسیخته جمعیت و نیاز بیش­تر به تولیدات کشاورزی و نیز رشد سریع سطح استاندارد زندگی در کشورهای در حال توسعه و جهان سوم و به تبع آن رشد نیاز به محصولات صنعتی و کشاورزی، با بحران شدید آب مواجه خواهند شد. بنابراین استفاده مطلوب و بهینه از منابع آب از یک سو و از سوی دیگر افزایش سطح تولیدات کشاورزی و افزایش بهره­وری در کشاورزی امری ضروری و اجتناب­ناپذیر خواهد بود. در این ارتباط، طراحی و ساخت دستگاه اندازه‌گیری رطوبت و دمای خاک و نیز تعیین عصاره اشباع خاک به طور همزمان مدنظر قرار گرفت که نهایتاً تلاش سه ساله و ارتقای سطح کیفی سنسورها و دیتالاگر ساخته شده، این امر را در سال 1391 میسر ساخت. کاربرد دستگاه اندازه‌گیری داده‌های محیطی مذکور با نام تجاری REC-P55، در آزمایش‌های میدانی نشان داد که این دستگاه می‌تواند با دقت 05/0 درصد و صحت 5/0 درصد در خاک­های با بافت‌ متفاوت و نیز در اعماق مختلف داده­های رطوبت وزنی خاک را ثبت نماید. به طوری که مقایسه رطوبت ثبت شده توسط دستگاه و روش وزنی دارای همبستگی حدود 99% بود. هم­چنین با عنایت به قابلیت‌های دستگاه، مشخص شد که امکان ایجاد پروفیل‌ رطوبتی خاک به راحتی با این دستگاه وجود دارد و دستگاه در مقایسه با بلوک‌های گچی و دستگاه PR2 نتایج دقیق‌تری را بدست می‌دهد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Design and Construction of REC-P55 for Reading of Soil Moisture, temperature and Salinity

نویسندگان [English]

  • Hossein Ansari 1
  • Mohammad Hassanpour 2
1 Associate Professor of Water Engineering Department, Faculty of Agriculture, Ferdowsi University of Mashhad ., Mashhad., Iran
2 Under Graduated of Water Engineering and Science Department, College of Agriculture, Ferdowsi University of Mashhad (FUM)., Mashhad., Iran
چکیده [English]

In the next decades, rapid population growth, increasing demand of agricultural yield and the standard living especially in the developing countries will significantly reduce water availability for agriculture. Therefore, desirable and optimal use of water resources and increasing agricultural productivity are vital. So, in this research, newly developed sensor has been designed and constructed for determining and monitoring real-time temperature, salinity and water content, with three years efforts from 1390. Environmental data measurement system using the brand REC-P55 in the field experiments showed that this system can record moisture content with accuracy less than 0.05% and validity less than 0.5% in different soil textures and depths. Moreover, the correlation coefficient for actual recorded data and REC-P55 one is 99%. Also, according to the capabilities of REC-P55, it was found that soil moisture profiles can be easily created and the results are of a high precision in comparison with the electrical resistance sensor and PR2.

کلیدواژه‌ها [English]

  • soil moisture
  • irrigation
  • Temperature
  • Salinity
  • Measurement
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