Effect of Biochar and Saline Irrigation Water on Chemical Properties of Soil under Fababean Cultivation
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

Nowadays, due to limited water resources and low soil fertility, especially in arid and semi-arid regions, the use of water with low quality (such as saline water) and soil amendments such as biochar is essential. Biochar is a kind of charcoal produced from plant residue and animal manure, which improves soil physical and chemical properties due to its porous structure. Therefore, the current research was conducted to investigate the effect of different levels of saline irrigation water and biochar on soil chemical properties under faba bean cultivation. Four saline irrigation water treatments having EC values of 0.5, 2.5, 5 and 7.5 dS m-1 and four levels of biochar including 0, 1.25, 2.5 and 3.75 % w/w were applied based on completely randomized design with three replications. Chemical properties such as potassium, calcium, and sodium ions concentration, sodium adsorption ratio, and electrical conductivity of saturated extract were measured in two depths of 0-10 and 10-20 cm. The results showed that increase in salinity and biochar levels increased the amount of sodium, potassium, and calcium ions and also soil electrical conductivity. Further, all ions concentration, sodium adsorption ratio, and electrical conductivity in the depth of 0-10 cm were higher than 10-20 cm depth, due to soil evaporation and water and solute movement towards upper layer. According to the results obtained in this study, it can be concluded that the use of biochar as a rich source of plant nutrients can greatly increase availability of nutrients such as calcium and potassium in soil, but, the negative effects of biochar application, such as increasing salinity, should be considered.

Language:
Persian
Published:
Iranian Journal of Soil Research, Volume:32 Issue: 1, 2018
Pages:
13 to 24
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