Effect of mineral Fertilizer NPK and Biochar on some growth and Yield characteristics of Maize crop (Zea mays L.) in Calcareous soil in Northern Iraq
DOI:
https://doi.org/10.36077/kjas/2026/v18i2.31877Keywords:
Maize Crop, biochar, calcareous soil, NPK mineral fertilizerAbstract
The study was conducted on calcareous soil in northern Iraq to study the effect of mineral fertilizer NPK and biochar on some growth and yield characteristics of yellow maize crop. A basic dose of N, P, and K nutrients was added according to the fertilizer recommendation (320 N - 200 P2O5 - 80 K2O) kg h-1 by using urea fertilizer (46⁒ N), tri-superphosphate fertilizer (47.5⁒ P2O5) and potassium sulphate fertilizer (50⁒ K2O), as follows: Control treatment (F0), 50% of the recommended NPK (F1) and 100% of the recommended NPK (F2). Biochar was added at three levels (0, 1, and 2%).Statistical analysis using Duncan's test indicated that 100% of recommended NPK + 2% biochar (F2B2) treatment had a significant effect on plant height (214.66 cm), grain yield (6525.00 kg h-1), leaf area (8764.89 cm2) and chlorophyll content (40.67 spad), dry weight of shoots (31848.67 kg h-1), cob length (20.70 cm) and number of grains in the row (34.27 grain row-1). Therefore, this treatment can be justified for the use these mixed fertilizers in the future to get a good quantity and quality yield of yellow maize crop in calcareous soils.
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