Studies on effect of growing media, IBA and bio-inoculants for rooting and survivability of air layering in guava (Psidium guajava L.)

The present investigation “Studies on effect of growing media, IBA and bio-inoculants for rooting and survivability of air layering in guava (Psidium guajava L.)”. Horticulture Farm, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during the year August, 2024-February 2025. The experimental was conducted in a RBD (Randomized Block Design) with 07 treatments and 4 replications. This study took place from August 2024 to February 2025. The experiment used a Randomized Block Design (RBD), a method that helps to reduce the effects of variables by randomly assigning treatments to blocks. In total, there were 7 different treatments tested, and each treatment was repeated four times to ensure that the results were reliable. The main focus of the experiment was to evaluate the effects of different concentrations of IBA and various bio-fertilizers on plant growth. The 7 treatments included: 1. Control (T0) 2. IBA ppm (T1) 3. IBA3000 ppm (T2) 4. Azotobacter 15 ml per kg of rooting media (T3) 5. Azotobacter 30 ml per kg of rooting media (T4) 6. Azospirillum 15 ml per kg of rooting media (T5) 7. Azospirillum 30 ml per kg of rooting media (T6) The results showed that the air layers treated with IBA at 3000 ppm (T2) had the best outcomes. This remedy resulted in the maximum numbers of both number one and secondary roots, as well as the longest roots. moreover, it produced the greatest sparkling and dry weight of roots, the highest variety of shoots, the longest shoots, and the most leaves. It additionally caused a better survival price of the air layers in comparison to the alternative treatments. Following the IBA 3000 ppm remedy, the subsequent quality results had been visible with IBA at 2000 ppm (T1), Azospirillum30 ml/kg of rooting media (T6), and Azotobacter 30 ml/kg of rooting media (T4). How ever, the treatment that did no longer use any plant growth regulator (T0 manipulate) showed the lowest numbers and lengths of number one and secondary roots. It additionally recorded the smallest clean and dry root weights, the fewest shoots, the shortest shoots, and the least variety of leaves, in conjunction with the lowest survival rate for the air layers. Over all, this experiment highlighted the essential role that both IBA and bio-fertilizers play in enhancing plant boom, mainly inside the formation of roots and shoots, which are important for the healthful development of plant life.