Dual application effects of biochar and phosphorus on rapeseed growth and nutrition in an alkaline loam soil

Articles in Press

Document Type : Research Paper

Authors

1 Soil Science Department, Faculty of Agriculture,University of Tabriz,Tabriz,Iran

2 Soil Science Dept

3 Department of Soil Science, Faculty of Agriculture, University of Tabriz

10.22034/saps.2024.61459.3216

Abstract

Background& Objective
In this research, the effects of combined application of biochar pyrolysed at 300˚C and phosphorous (P) fertilizer on growth and primary macronutrients uptake by rapeseed (Brassica napus L.), Hyola 308 cultivar were studied in an alkaline loamy soil.
Methods & Maerials:
A factorial experiment was done in a completely randomized design with three replicates. The factors were organic matter at two sources (biochar and wheat straw) and three levels (0, 20 and 40 g kg-1 ) and P at three levels (0, 20, and 40 mg kg-1 as triple superphosphate). Before the plants harvesting, leaf chlorophyll index was measured. After the plant harvesting, dry weights of shoot and root, seed oil content, the concentrations of nitrogen (N), P, and potassium (K) were determined.
Results
Application of P fertilizer and biochar significantly increased leaf chlorophyll index, dry weights of shoot and root and seed oil content compared to the control. Also, dual application of biochar and P increased shoot concentrations of P and K. The combined application of 2% biochar and 20 mg P per kg of soil resulted in the production of dry matter of the rapeseed shoot equivalent to the application of 40 mg P per kg of soil alone.
Conclusion
The application of biochar obtained from pyrolysis of wheat straw at 300 °C at 2% level in an alkaline loam soil improved rapeseed plant growth and led to a decrease in the consumption of P fertilizer.

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Main Subjects

JOURNAL OF AGRICULTURAL SCIENCE AND SUSTAINABLE PRODUCTION

Articles in Press, Accepted Manuscript
Available Online from 20 April 2025

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