Synergistic effects of nitrogen fertilization, irrigation regimes, and soil microbial health on pomegranate growth and quality
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A field experiment was conducted at the Instructional Farm, Agricultural Research Sub-Station, Sumerpur, Pali, during 2022-23 and 2023-24, titled "Synergistic effects of nitrogen fertilization, irrigation regimes, and soil microbial health on pomegranate growth and quality”. The experiment consists eighteen treatments which were laid out in split plot design with three replications. In different levels of nitrogen and irrigation, there were three levels of nitrogen i.e. N 1 (100%), N 2 (75%) and N 3 (50%) of RDF and three levels of irrigation i.e. W 1 (20%), W 2 (40%) and W 3 (60%) of soil moisture depletion of field capacity. The results revealed that application of 100 per cent nitrogen (N 1 ) and irrigation at 20 per cent (W 1 ) soil moisture depletion of field capacity resulted enhance plant height (2.96 m), annual shoot growth (30.3 cm), bloom intensity (42.6), fruit weight (239 g), fruit yield per plant (23 kg), juice content (82%), ascorbic acid (13.6 mg/100g) and bacterial population in soil (43.18 cfu/g of soil) along with minimum premature fruit cracking (8.06%) of the fruits. Whereas, TSS content was maximum (14.3 Brix) in 100 per cent nitrogen and irrigated at 60 per cent soil moisture depletion of field capacity.The results on soil microbial inoculation of Plant Growth Promoting Rhizobacteria and Arbuscular Mycorrhizal Fungi, there were two levels of soil microbial inoculation i.e. R 1 (plant inoculated with plant growth promoting rhizobacteria and arbuscular mycorrhizal fungi) and R 0 (plant without inoculation of plant growth promoting rhizobacteria and arbuscular mycorrhizal fungi). The results revealed that plants inoculated with plant growth promoting rhizobacteria and arbuscular mycorrhizal fungi resulted enhance plant height (2.98 m), annual shoot growth (31.1 cm), bloom intensity (43.7), fruit weight (238 g), fruit yield per plant (23.6 kg), juice content (83.5%), ascorbic acid (13.8 mg/100g) and bacterial population in soil (43.7 cfu/g of soil) along with minimum premature fruit cracking (7.96%) of the fruits. Whereas, TSS content was maximum (14.32 Brix) of the fruits as compare to the plant which was without inoculation of plant growth promoting rhizobacteria and arbuscular mycorrhizal fungi.
