Effect of combined exposure of chemical fertilizer, bacterial inoculums, and compost on the growth of forest tree species in saline soil

Abstract

Salinity is the leading abiotic stress, especially in India, where saline soil affects 6.727 million hectares. The study investigated the effects of different combinations of chemical fertilizers, bacterial inoculums, and compost on the growth of Prosopis cineraria and Toona ciliata in pot experiments using saline forest soil. Treatments included varying mixes of seeds, compost, bacterial inoculums, and chemical fertilizers. Soil analysis confirmed salinity with pH and electrical conductivity (EC) levels indicating saline conditions. Results showed that treatments incorporating compost and bacterial inoculums significantly enhanced plant growth, increasing shoot, and root lengths, as well as fresh and dry weights. The application of compost increased the root length of Toona ciliata. The dual application of Pseudomonas spp. and compost enhanced the biomass of the root, whereas the application of chemical fertilizer and compost improved the height of the plan. The study indicates that the combined application of compost, bacterial inoculum, and chemical fertilizer is superior in enhancing the growth and development of the vegetative growth of plants. Overall, the study underscores the potential of integrated nutrient management strategies involving compost, bacterial inoculums, and reduced chemical fertilizers to enhance productivity in saline and salt-affected soils.