Sudhish Kumar Shukla

Soil organic carbon, dehydrogenase activity, nutrient availability and leaf nutrient content as affected by organic and inorganic source of nutrient in mango orchard soil

Changes in soil organic carbon, dehydrogenase activity, nutrient availability and leaf nutrient concentrations in a mango orchard soil was evaluated from four years (2007-2011) field experiment on a Typic Ustocrepts soil of subtropical region in Lucknow, India. Organic (FYM, vermicompost, mulching, Azotobacter, PSM and Trichoderma harzianum) and inorganic (N, P, K) substrates were applied each year within the tree basin. It was observed that soil and leaf nutrients concentrations significantly increased in organic and inorganic amended soils as compared to control. Vermicompost, organic mulching and microbial inoculation significantly enhanced soil organic carbon content, available nutrients, dehydrogenase activity and leaf nutrient concentrations. Dehydrogenase activity was highest (1.85 ig TPF g-1 h-1) in organically treated soils. Surface soil (0-10 cm depth) showed higher dehydrogenase activity (1.29 to 1.85 ig TPF g-1 h-1) as compared to lower soil depths in all the treatments.

Effect Of Integrated Nutrient Management On Some Soil Properties In Mango Orchard

Mango orchard soils of Uttar Pradesh are generally poor in essential soil nutrients and low fertility had impacted productivity as well as fruit quality. Integrated nutrient management with different organic and inorganic substrates may be a boon to improvement in soil processes and thereby productivity of the orchards. Results from an experiment on integrated nutrient management for mango orchard indicated improvement in soil properties. Improvement in soil organic carbon (SOC) content (0.45%) during four years of experimentation was recorded over the initial level of 0.21%. Soil moisture retention improved with organic mulching. Microbial activity in the form of dehydrogenase activity was also enhanced by integration of organics particularly vermicompost. Positive effect of different nutrient sources on availability of NPK and DTPA-extractable micronutrients were also revealed. This record was migrated from the OpenDepot repository service in June, 2017 before shutting down.