Volume 20, Issue 77 (Fall 2016)                   JWSS 2016, 20(77): 1-12 | Back to browse issues page


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Hosseinpur A, Salehi M, Khaefi F. Study of Potassium Fixation and its Relation to the Soil Characteristics in Some Chahar Mahal & Bakhtiary Soils. JWSS. 2016; 20 (77) :1-12
URL: http://jstnar.iut.ac.ir/article-1-3396-en.html
1. Faculty of Agr., Shahrekord Univ., Shahrekord, Iran.
Abstract:   (5828 Views)

Potassium (K) fixation in soil is an important process which affects the availability of K to plants. There is limited information on K fixation capacity (PFC) of soils in Chahar Mahal & Bakhtiary province. This study was carried out with the aim of determining PFC and its relation with soil characteristics in 10 samples of surface soils in Chahar Mahal & Bakhtiary province. PFC was determined by adding six different levels of K by using KCl salt and measuring cation exchange capacity (CEC) in mineral, organic and clay fraction of soils. The results showed that the CEC in the mineral, organic and clay soils changes from 16.02-19.38, 1.71-3.27 to 29.3-39.8 cmol+/kg consequently. Potassium availability index (PAI) in the soils changes from 0.36 to 0.7 and Potassium fixation index (PFI) changes from 0.29 to 0.63. According to the results PFI and PAI showed significant correlation with whole and mineral fraction of the soil CEC, clay percent, pH and CaCO3 percent. The results of this study also showed that fixation of K fertilizer in the studied soils plays an important role in K dynamic of soil and K availability to plants.

Full-Text [PDF 348 kb]   (1001 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2016/12/19 | Accepted: 2016/12/19 | Published: 2016/12/19

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