نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران
2 گروه علوم خاک- دانشگاه تبریز
3 دانشگاه تبریز
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
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.
کلیدواژهها [English]
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