Effect of biochar on potassium fractions and plant-available P, Fe, Zn, Mn and Cu concentrations of calcareous soils

Effect of biochar on potassium fractions and plant-available P, Fe, Zn, Mn and Cu concentrations of calcareous soils

Biochar as an eco-friendly substance, depending on its origin and production conditions, may have significant effects on soil properties, nutrient availability and K dynamics of arid and semi-arid soils. Biochars produced from wheat and corn residues, pyrolyzed at 250, 450 and 650 °C during 2, 4 and...

Full description

Saved in:
Bibliographic Details
Published in:Arid land research and management Vol. 36; no. 1; pp. 1 - 26
Main Authors: Rasuli, Fariba, Owliaie, Hamidreza, Najafi-Ghiri, Mahdi, Adhami, Ebrahim
Format: Journal Article
Language:English
Published: Philadelphia Taylor & Francis 02-01-2022
Taylor & Francis Ltd
Subjects:
Aridity
Availability
Calcareous soils
Charcoal
Copper
Corn
Corn biochar
Field capacity
Interlayers
Iron
Manganese
Mineral nutrients
Nutrient availability
Nutrient dynamics
Potassium
potassium saturation percentage
pyrolysis temperature
Saturation
Soil analysis
Soil dynamics
Soil management
Soil properties
Soil temperature
Temperature
Wheat
wheat biochar
Zinc
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Biochar as an eco-friendly substance, depending on its origin and production conditions, may have significant effects on soil properties, nutrient availability and K dynamics of arid and semi-arid soils. Biochars produced from wheat and corn residues, pyrolyzed at 250, 450 and 650 °C during 2, 4 and 8 h, were applied to four representative calcareous soils. First, 2 g of each biochar was added to 100 g of each soil and incubated under field capacity for 90 days. Then the soil samples were analyzed for soil properties, nutrient availability and K fractions. All biochars increased soil CEC, ECe and available K, P, Fe, Zn, Mn and Cu. The biochars produced at higher temperature had larger effect on soil properties, P and K availability, and smaller effect on Fe, Mn and Zn availability. The used biochars increased the amounts of soluble, exchangeable, non-exchangeable and HNO 3 -extractable K to 143-348, 316-605, 597-1,064 and 1,056-2,012 mg kg −1 , respectively. The wheat biochar had larger effect on soil K than the corn biochar. Potassium saturation percentage increased with biochar application due to the larger effect of biochar on exchangeable K than CEC. The biochars increased the percentage of soluble K due to the limited capacity of exchange sites and clay interlayers for K adsorption. Biochar had different effect on the experimental soils; and the content of soluble K in the coarse-textured soils after biochar application increased more, than other K fractions. It was concluded that biochars, particularly the wheat biochar produced at higher temperature, have potential for improving K management of K depleted soils.
ISSN:1532-4982
1532-4990
DOI:10.1080/15324982.2021.1936689