Assessing the Impact of Mineral Based Nutrient Sources and Nano-Fertilizers on Root Growth, Soil Health, and Nutrient Availability in Wheat Crop

Aim Utilizing mineral based nutrient source (IMBP) in tandem with nano fertilizers can promote nutrient release and soil microbiological parameters. Methods Developing IMBP by incubation of minerals with organic matter which along with nanofertilizers were evaluated under field conditions in comparison to recommended fertilizers. Experiment laid out in strip plot with three horizontal factors (Recommended P & K; IMBP + Nano DAP; IMBP + Nano K) and four vertical factors (Control; 3 sprays of Nano urea only; Basal+ 2 sprays of nano urea; Recommended dose of nitrogen). Results IMBP was multinutrient source. Root length density, roost surface area density and root dry weight were 20-21%, 14-19% and 25-29% higher, respectively with IMBP and nano fertilizers compared to recommended P & K, and with RDN. Significant population of bacteria (73-74 ×10 5 CFU/g soil), and actinomycetes (49.7-49.8 ×10 5 CFU/g soil), dehydrogenase, alkaline and acid phosphatase activity were reported with IMBP + nanofertilizers. Higher values of microbial population, and enzyme activity were reported with basal + 2 sprays of nano urea, at par with RDN. Available nitrogen (245-246 kg/ ha), sulphur (16.3 kg/ ha) and silicon (71-78 mg/ kg soil) after harvest recorded significantly higher values for the IMBP, whereas phosphorus and potassium was comparatively higher where their nano forms were applied. These values were significantly higher for RDN, except available silicon which was highest for control. Conclusion The results indicate that mineral based products along with nano fertilizers can replace the existing recommended dose of fertilizers through synthetic fertilizers.