ارزیابی تناسب اراضی و پتانسیل تولید تابشی- حرارتی چغندرقند به روش فائو در اراضی دانشکده کشاورزی لرستان و مقایسه آن با دشت سیلاخور

نوع مقاله: کامل علمی - پژوهشی

نویسندگان

1 استادیار دانشکده کشاورزی- دانشگاه لرستان

2 استادیار مؤسسه تحقیقات چغندرقند

چکیده

این تحقیق در اراضی دانشکده کشاورزی دانشگاه لرستان بین طول شرقی و  عرض شمالی انجام گرفت. براساس اطلاعات نزدیک‌ترین ایستگاه هواشناسی سینوپتیک، منطقه مورد مطالعه، جزء اقلیم نیمه خشک می‌باشد. میانگین حداکثر درجه حرارت روزانه منطقه در تیرماه برابر با 5/29 و میانگین حداقل درجه حرارت روزانه در دی‌ماه 5/5 درجه سانتی‌گراد ثبت شده است. متوسط بارندگی منطقه 509 میلی‌متر در سال است. چهار نیمرخ شاهد از تعداد 30 نیمرخ حفر شده انتخاب گردید. خاک‌ها در دو ردۀ اینسپتی سول و انتی سول قرار گرفتند و در مجموع چهار فامیل و 12 واحد اراضی خاک تشخیص داده شد. هدف از این تحقیق مقایسه ارزیابی کیفی تناسب اراضی و پتانسیل تولید تابشی– حرارتی به روش فائو در دو منطقه خرم‌آباد و دشت سیلاخور بود. نتایج نشان داد که پتانسیل تولید چغندرقند در خرم‌آباد برابر با 67590 کیلوگرم در هکتار و کلاس‌های تناسب اراضی به روش پارامتریک S2 و S3 می‌باشد. در صورتی که در دشت سیلاخور کلاس تناسب اراضی S2، S3 و Ns به‌دست آمد. محدودیت‌های اصلی خاک در خرم‌آباد شامل کربنات کلسیم، پستی و بلندی و سنگریزه است، در صورتی که در دشت سیلاخور زهکشی، پستی و بلندی، بافت خاک، سنگریزه، واکنش خاک و درصد سدیم تبادلی می‌باشند. بنابراین عملکرد کشاورزان می‌تواند با رفع محدودیت‌های قابل اصلاح خاک و ارتقاء مدیریت افزایش یابد. در این روش به جای نمونه برداری از کلیه پروفیلها از نیمرخ های انتخابی نمونه گیری کردند، لذا هزینه‌های آزمایش‌های شیمیایی، فیزیکی و مینرالوژیکی نمونه‌های خاک در این روش کمتر است.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of land suitability and radiation-thermal production potential of sugar beet by FAO method in the fields of Department of Agriculture of Lorestan, Iran and its comparison with Silakhoor Plain

نویسندگان [English]

  • A. Sohrabi 1
  • M.A. Chegini 2
1 Assistant Professor of Department of Agriculture, University of Lorestan,Iran
2 Assistant Professor of Sugar Beet Seed Institute (SBSI),Iran
چکیده [English]

The study was carried out in the fields of Department of Agriculture, University of Lorestan, Iran(Lat. 32°18´ N., Long. 45°22´ E.). According to the data gathered in the nearest synoptic meteorological station, the studied region is classified under semi-arid climates. Mean maximum and minimum daily temperatures have been recorded in July and January as 29.5 and 5.5°C, respectively. Mean annual precipitation is 509 mm. Four control profiles were selected out of 30 dug profiles. The soils were in two categories of Inceptisols and Entisols. In total, 4 families and 12 soil field units were recognized. The objective of the current study was to compare the qualitative evaluation of land suitability and radiation-thermal production potential of sugar beet in two regions of Khorramabad and Silakhoor Plain, Iran, by FAO method. Results showed that sugar beet production potential was 67950 kg.ha-1 in Khorramabad and the land suitability classes were determined as S2 and S3 by parametric method, whereas land suitability classes were S2, S3 and Ns in Silakhoor Plain. The main soil constraints included CaCO3, relief and detritus in Khorramabad, while they were drainage, relief, soil texture, detritus, soil reaction and exchangeable Na percentage in Silakhoor. Therefore, farmers can improve the productivity by removing the modifiable limitations and improving management. But, the expenses of physical, chemical and mineralogical analysis of soil samples were low in this study.

کلیدواژه‌ها [English]

  • FAO method
  • land evaluation
  • Parametric Method
  • Radiation-thermal production potential
  • sugar beet

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