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Swarajya Lakshmi, G.
- Survey of Chilli Growing areas in Guntur District for Variations in Input and Yield Levels, Soil Properties and Microbial Populations
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Authors
Affiliations
1 Department of Soil Science, Regional Research Unit (Chemistry) Regional Agricultural Research Station, Lam, Guntur (A.P.), IN
2 Department of Bioresources and Environmental Studies, College of Agriculture, Acharya N.G. Ranga Agricultural University, Hyderabad (A.P.), IN
1 Department of Soil Science, Regional Research Unit (Chemistry) Regional Agricultural Research Station, Lam, Guntur (A.P.), IN
2 Department of Bioresources and Environmental Studies, College of Agriculture, Acharya N.G. Ranga Agricultural University, Hyderabad (A.P.), IN
Source
An Asian Journal of Soil Science, Vol 4, No 2 (2010), Pagination: 183-185Abstract
A survey was conducted in chilli growing areas of Guntur district on soil properties, nutrient status and microbial populations besides collection of rhizosphere samples for isolation of Azospirillum inoculants.The survey indicated that out of 50 rhizosphere soils surveyed, 40 samples were heavy black or mixed black, the rest of 10 were sandy or red sandy loams. All the soils were neutral to alkaline in reaction, non saline and high in potassium status. Only 12 and 18 per cent of the surveyed samples were medium in organic carbon and available nitrogen, respectively. Rest were low in both the parameters. Only 8 per cent of samples recorded medium in available P2O5 and the rest were high. Population of Azospirillum ranged from 3.53 to 5.82 log10 CFU. High population of Azospirillum (>5 log10 CFU) was noticed in rhizosphere of chilli grown in heavy black soils. Comparatively, higher populations of other bacteria, fungi and actinomycetes were noticed where the crop was grown on heavy black soils under high level of input utilization. A non significant negative correlation was observed between the soil pH and EC and microbial population. Significant positive correlation was noticed between organic carbon and population of Azospirillum, other bacteria and fungi. Similar significant positive correlation was noticed between soil N and Azospirillum, other bacteria and fungi.Keywords
Chilli, Rlizosphere Soils, Available Nutrients, Microbial Population, Azospirillum, Bacteria, Fungi, Actinomycetes.- Bio Assay of Different Native Isolates of Azospirillum
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Authors
Affiliations
1 Regional Agricultural Research Station, Lam Farm, Guntur (A.P.), IN
1 Regional Agricultural Research Station, Lam Farm, Guntur (A.P.), IN