Effect of different land use on Potassium forms and some soil properties in Kohgiluyeh and Boyer-Ahmad Province, Southwest Iran

Document Type: Research Paper


1 Soil and Water Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center

2 Department of Agriculture, Payame Noor University, Tehran, Iran



The pasture and forest land use change to agricultural use can effect on many properties of the soil and its productivity. The present research aims to investigate various forms of K (soluble, exchangeable, non-exchangeable, and structural forms) and some soil properties in different land use of three areas including Choram, Kakan and Bahmaei in Kohgiluyeh and Buyer-Ahmad Province. Four profiles were excavated in different land use of each area (In total, 12). All profiles were described and classified based on the Keys to Soil Taxonomy. The results showed that there is not any significant positive correlation between the clay and silt contents in different land use, while the lowest content of clay was observed in agricultural land use. The percentage of organic carbon was in its highest level in pasture land use (1.01%), and in its lowest level in agricultural (0.7%) and (0.4%) wheat cultivation. The highest and lowest pH levels were obtained in paddy soil (8.11) and garden (6.8), respectively. The average level of soluble, exchangeable, non-exchangeable, structural and total forms of K in the studied area were 0.5- 6.1, 45-262, 86-366, 835-5197 and 967-5555 mg/kg of the soil, respectively. The studied soils of Kakan and Choram areas had the lowest and highest levels of non-exchangeable, structural, and total forms of K, respectively. In addition, the highest levels of soluble and exchangeable forms of K were observed in Bahmaei and Kakan areas, respectively. The soluble and exchangeable forms of K had significant changes in different land use,


Article Title [Persian]

اثر تغییر کاربری اراضی بر شکل‌های مختلف پتاسیم و برخی خصوصیات خاک در استان کهگیلویه و بویر احمد، جنوب غرب ایران

Authors [Persian]

  • ابوالفضل آزادی 1
  • سیروس شاکری 2
1 بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان خوزستان،
2 گروه کشاورزی، دانشگاه پیام نور
Abstract [Persian]

تغییر کاربری اراضی مرتع و جنگل به اراضی کشاورزی، می‌تواند بر بسیاری از ویژگی‌های خاک و حاصلخیزی آن اثر بگذارد. این پژوهش با هدف بررسی شکل‌های مختلف پتاسیم (محلول، تبادلی، غیرتبادلی و ساختمانی) و برخی خصوصیات خاک در کاربری‌های مختلف سه منطقه چرام، کاکان و بهمئی استان کهگیلویه و بویراحمد انجام گرفت. در هر منطقه 4 خاکرخ در کاربریهای مختلف حفر شد(جمعا 12 خاکرخ). تمام خاکرخ‌ها تشریح و بر اساس کلید سیستم جامع طبقه‌بندی خاک طبقه‌بندی شدند. نتایج نشان داد تفاوت معنی داری بین میزان رس و سیلت در کاربری‌های مختلف وجود ندارد، در حالیکه کمترین مقدار رس در کاربری زراعی مشاهده شد. درصد کربن آلی در کاربری مرتع بیشترین مقدار(01/1درصد) و در کاربری‌های زراعی(7/0) و آیش- گندم(4/0) کمترین مقدار بود. بیشترین پ. هاش خاک در کاربری شالیزار به میزان 11/8 و کمترین مقدار نیز در کاربری باغ به میزان 8/6 بدست آمد. در مناطق مورد مطالعه میانگین مقدار پتاسیم محلول، تبادلی، غیر تبادلی، ساختمانی و کل به ترتیب از 5/0 تا 1/6 ، 45 تا 262، 86 تا 366، 35 تا 5197، 967 تا 5555 میلی‌گرم بر کیلوگرم خاک متغیر می‌باشد. خاک‌های مورد مطالعه در منطقه کاکان کمترین و منطقه چرام بیشترین مقدار شکل‌های غیر تبادلی، ساختمانی و کل پتاسیم را دارند و بیشترین مقدار پتاسیم محلول در منطقه بهمئی و پتاسیم تبادلی در منطقه کاکان بدست آمد. پتاسیم محلول و تبادلی در کاربری‌های مختلف دارای تغییرات معنی دار بود بطوریکه بیشترین مقدار آن به ترتیب در کاربری‌های گندم و جنگل مشاهده شد.

Keywords [Persian]

  • "کاربری اراضی"
  • " خصوصیات خاک"
  • " کانی شناسی"
  • " پتاسیم"
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