Volume 19, Issue 72 (summer 2015)                   jwss 2015, 19(72): 269-279 | Back to browse issues page

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Farshadirad A, Dordipour E. Contribution Of Soil and Soil Fractions' (Clay and Silt) Exchangeable and Nonexchangeable Potassium to Available Potassium for Corn Plant in Loess-Like and Loess-Derived Soils of Golestan Province. jwss 2015; 19 (72) :269-279
URL: http://jstnar.iut.ac.ir/article-1-3081-en.html
Dept. of Soil Sci., Agric. College of Shahrekord University. , Farshadirad@gmail.com
Abstract:   (12332 Views)

Determination of relationships between different forms of potassium in soils and their constituents can help us to resolve some nutritional problems such as potassium fixation and release and its fertilization management in soil. This investigation was carried out to determine the contribution of soil and their constituents (clay and silt) Kex and Knex to available potassium for plants in 12 loess-like and loess-derived soil series of Golestan province in a pot experiment of corn. Total K uptake of corn in the greenhouse experiment was used as an index of soil-available K. Results showed that the contribution of Kex to plant K uptake was more than that of Knex in clay fraction of all soils. Whereas the contribution of Knex to plant K uptake was more than that of Kex in silt fraction of all soils excluding Oghchi soil series with the highest initial Kex. Therefore, the silt fraction is an important K source for supplying the plant need for K in loess-like and loess-derived soils.

Keywords: Potassium, clay, silt.
Full-Text [PDF 334 kb]   (4510 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2015/08/25 | Accepted: 2015/08/25 | Published: 2015/08/25

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