Responses of Soil Microbial Population and Lignocellulolytic Enzyme Activities to Palm Kernel Shell Biochar Amendment

Biocompost has been identified as an alternative to chemical fertilizers that increased soil microbial population and soil enzyme activities in sustainable farming. The objective of this field study was to evaluate the effect of three halophytic composts in combination with farmyard manure and phosphate solubilising bacteria (Bacillus megaterium) on soil microflora and enzyme activities. The results show that among nine treatments given, the application of Suaeda compost in combination with farmyard manure and phosphate solubilising bacteria (T9) significantly increased the soil microflora such as bacteria, fungi and actinomycetes and soil enzyme activities such as dehydrogenases, alkaline phosphatase, cellulase and urease in soil cultivated with Arachis hypogaea.

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Soil microbial population numbers and enzyme activities in relation to altitude and forest degradation

Soil Biology and Biochemistry ◽

10.1016/0038-0717(92)90250-2 ◽

1992 ◽

Vol 24 (8) ◽

pp. 761-767 ◽

Cited By ~ 62

Author(s):

Dhruva Kumar jha ◽

G.D. Sharma ◽

R.R. Mishra

Keyword(s):

Enzyme Activities ◽

Microbial Population ◽

Forest Degradation ◽

Soil Microbial ◽

Soil Microbial Population ◽

Population Numbers

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Influence of Copper Contamination on Soil Physico-chemical Properties, Microbial Population and Enzyme Activities

Science & Technology Journal ◽

10.22232/stj.2021.09.02.04 ◽

2021 ◽

Vol 9 (2) ◽

pp. 40-45

Author(s):

◽

Remruattluanga Hnamte ◽

TBC Laldingliangi ◽

H. Lalruatsanga ◽

R. Lalfakzuala ◽

...

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Enzyme Activities ◽

Plant Pathogens ◽

Microbial Population ◽

Control Plant ◽

Soil Enzyme ◽

Soil Enzyme Activities ◽

Soil Microbial ◽

Soil Microbial Population

Heavy metals are known for their phytotoxicity and commonly used in agrochemicals to control plant pathogens. Accumulation of heavy metals in soil may occur through extensive use of heavy metal-based agrochemicals over time or from industrial pollution. However, this study was focussed on the immediate effect of the heavy metal, Copper (Cu) contamination on soil microbial population and soil enzyme activities (viz. acid phosphatase, β-glucosidase, urease & dehydrogenase). Soil with graded doses of Cu was prepared by treating soil samples with varying concentrations of Copper (ll) sulphatepentahydrate (CuSO4.5H2O) where three levels of CuSO4.5H2O (50, 100 & 200 mg/kg soil) treatments were formulated along with control. A significant decrease in soil microbial population and soil enzyme activities was observed in all treatments.

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Study of Soil Microbial Population and Enzyme Activities under Jasmine Cultivation as Influenced by Nutrient Sources

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2021/v40i1131368 ◽

2021 ◽

pp. 32-42

Author(s):

B. Bhakiyathu Saliha ◽

B. Banupriya ◽

P. Balasubramaniam ◽

R. Indirani

Keyword(s):

Enzyme Activities ◽

Tamil Nadu ◽

Microbial Population ◽

Nutrient Deficiencies ◽

Npk Fertilizers ◽

Nutrient Sources ◽

Soil Microbial ◽

Jasminum Sambac ◽

Soil Microbial Population

Multi nutrient deficiencies in soil have been reported with increasing frequency over the past two decades on a worldwide scale, is considered as an important factor that reduces yield and affects the quality of harvested products. Nutrient cycling and transformation of in soil is influenced by microbes and the availability of organic and inorganic nutrients to plants and microbes can both be controlled through enzyme activities. Keeping this in view a field experiment was conducted at O. Alangulam village of Thiruparankundram block, Madurai district, Tamil Nadu during 2016-18 to evaluate the influence of organic and inorganic sources of nutrients on soil microbial population and enzyme activities and optimize the sulphur requirement of Jasmine (Jasminum sambac) which plays a key role in enhancing the yield and quality of flowers. The significantly higher bacterial population of 124 × 106 CFU g-1 was observed in the treatment that received pressmud as sulphur source @ 60 g sulphur/plant/year along with RDF (recommended dose of fertilisers were applied @ 60:120:120 g of N:P2O5:K2O/plant/ year in the form of urea, SSP and MOP).This was followed by the treatment that received pressmud @ 40 g sulphur/plant/year along with RDF (111 × 106 CFU g-1). Application of inorganic NPK fertilizers without organics decreased the activities of dehydrogenase and aryl sulphatase enzymes. The flower yield hectare-1 ranged from 3.8 to 15.4 tonnes ha-1as influenced by various nutrient sources. Application of RDF along with Gypsum @ 60 g sulphur/ plant/year recorded significantly higher yield followed by the treatment that received RDF along with Pressmud @ 60 g sulphur/plant/year.

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