Effect of different concentration of mineral fertilizers on growth and yield of Curcuma longa L. in Surkhandarya region, Uzbekis tan

The application of mineral fertilizers plays a crucial role in improving the growth parameters and yield potential of turmeric.This study was carried out in the Surkhandarya region of Uzbekistan to evaluate the influence of different fertilizer treatments on turmeric cultivation.A field experiment was designed with four treatments: T1 (Control), T2 (N75P50K50 kg/ha), T3 (N125P100K100 kg/ha), and T4 (N100P75K75 + B3Zn6Fe6 kg/ha), the latter referred to as the macro-and micro-nutrient fertilizer (MMNF).Both the T3 and MMNF treatments led to notable improvements in leaf length, number of leaves, leaf width, and plant height compared to the control at 120 and 180 days after planting.MMNF treatment exhibited the highest values for all growth parameters under the region's climatic conditions.Fresh rhizome yield per plant also significantly increased under T3 and MMNF treatments.Specifically, T3 improved yield by 119.7%, while MMNF resulted in a 132.4% increase over the control.Moreover, a very strong positive correlation was observed between leaf width and both rhizome yield per plant and per square meter.Similarly, leaf length showed a highly significant positive correlation with rhizome yield metrics.These findings suggest that MMNF is the most effective among the tested treatments for enhancing turmeric yield under field conditions.Notably, this is the first documented field study on turmeric cultivation using rhizomes in Uzbekistan.

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