scholarly journals Effect of Fertilizer Sources on Soil Organic Matter and Soil Microbial Population in Broccoli Field

2020 ◽  
Vol 4 (6) ◽  
pp. 36-44
Author(s):  
Salina Panta ◽  
Purushottam Subedi ◽  
Indira Bhattarai
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Microbial Population ◽  
Soil Microbial ◽  
Soil Microbial Population

scholarly journals Loss of Soil Organic Matter, Lignocellulose and Microbial Population in Oil Palm Plantations Located at Different Slopes

2017 ◽  
Vol 22 (3) ◽  
pp. 175-181
Author(s):  
Rika Andriati Sukma Dewi ◽  
Lilik Tri Indriyati ◽  
Bandung Sahari ◽  
Supiandi Sabiham
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Oil Palm ◽  
Soil Compaction ◽  
Bacterial Population ◽  
Microbial Population ◽  
Soil Microbial ◽  
Oil Palm Fronds ◽  
Palm Fronds ◽  
Soil Microbial Population

Loss of soil organic matter can be caused by erosion triggered by soil compaction and high rainfall. The aims of  the study were to determine (1) the loss of soil organic matter, lignocellulose, and soil microbial population due to erosion and (2) the contribution of organic matter from oil palm fronds. In the current study, the erosion plots were built on the accessible inter-row (gawangan hidup) and inaccessible inter-row (gawangan mati) of oil palm plantations located at the slope of 6-10% and >10%. Soil organic matter, lignin, cellulose, and hemicellulose contents and total soil microbial populations were measured in the sediments collected from the erosion plots. The results showed that the loss of organic matter was higher in the accessible inter-row than that in the inaccessible inter-row. The addition of lignin, cellulose, and hemicellulose from oil palm fronds into the soil are 2.06 Mg ha-1 yr-1, 1.13 Mg ha-1 yr-1 and 1.02 Mg ha-1 yr-1, respectively. Total bacterial population in the sediments taken from the accessible inter-row was higher than that from the inaccessible inter-row, while the total fungal population in the sediments from the inaccessible inter-row was higher than that from the accessible inter-row.  

Dietary condensed tannins in bovine faeces and effects on soil microbial dynamics: are there environmental benefits for cattle production systems?

2021 ◽  
Vol 61 (7) ◽  
pp. 690
Author(s):  
Gisele M. Fagundes ◽  
Gabriela Benetel ◽  
Mateus M. Carriero ◽  
Ricardo L. M. Sousa ◽  
Kelly C. Santos ◽  
...  
Keyword(s):  
Organic Matter ◽  
Condensed Tannins ◽  
Nutrient Dynamics ◽  
Management Practices ◽  
Production Systems ◽  
Environmental Benefits ◽  
Nutrient Inputs ◽  
Microbial Dynamics ◽  
Soil Microbial ◽  
Soil Microbial Population

Context Plant bioactive compounds such as condensed tannins (CT) are seen as an alternative to rumen chemical modulators to mitigate rumen methanogenesis in livestock; however, the presence of CT in ruminant faeces also produces a series of changes in soil microbiomes. Little is known about these effects on soil nutrient dynamics. Therefore, whether CT affect the decomposition process of faecal organic matter, delaying it and consequently increasing soil carbon and nitrogen (N) sequestration, merits study. Aims Our study investigated the effects of a diet rich in CT on bovine faecal composition and on subsequent dynamics of a soil microbial population. Methods Faeces were analysed from cattle fed the following diets: control (no CT), 1.25% CT, 2.5% CT. In a greenhouse pot experiment over a period of 60 days, faeces from the three dietary treatments were applied to soil and the soil microbial populations were measured against a control with no faeces applied. Key results The presence of CT increased the excretion of faecal N and of neutral and acid detergent fibres and lignin, and the higher rate of CT reduced the rate of soil organic matter decomposition. Treatments with dietary CT resulted in greater total numbers of bacteria in the soil than in the no-faeces control and stimulated numbers of Actinobacteria, Proteobacteria (α-Proteobacteria) and Firmicutes. Conclusions The study showed that CT alter N recycling and other nutrient inputs in a soil–animal ecosystem by increasing faecal N inputs, delaying organic matter breakdown, and changing soil microbial dynamics. Implications The presence of CT in ruminant diets can be beneficial to the soil environment. Sustainable management practices should be encouraged by providing ruminants with feed including high-CT legumes in silvopastoral systems.

scholarly journals Carbon and Microbial Dynamics in Soil on Biochar Compost Plus Treatment

2020 ◽  
Vol 17 (2) ◽  
pp. 138-143
Author(s):  
Wahyu Purbalisa ◽  
Ina Zulaehah ◽  
Dolty Melyga W. Paputri ◽  
Sri Wahyuni
Keyword(s):  
Soil Carbon ◽  
Microbial Population ◽  
Organic Fertilizer ◽  
Organic Soil ◽  
Microbial Consortia ◽  
Soil Microbial ◽  
Randomized Design ◽  
Soil Microbial Population ◽  
Compost Treatment ◽  
Screen House

Carbon and microbes in the soil fluctuated from time to time due to various things. This study aims to determine the dynamics of carbon and microbes in the soil in the treatment of biochar-compost. In addition to the use of biochar-compost, this research also uses nano biochar and enrichment with microbial consortia. The study was conducted at the screen house using a complete randomized design with three replications with following treatments: control / without organic fertilizer (P0), compost (P1), biochar-compost 1: 4 (P2), nano-biochar-compost 1: 4 (P3 ), biochar-compost + microbial consortia (P4), compost + microbial consortia (P5) and biochar-compost + microbial consortia (P6) with a dose of 2.5 tons/ha respectively. Biochar comes from corncobs. Compost biochar plus application was made before planting.  Parameters observed were soil carbon (C-organic), soil acidity (pH) at 7 DAA, 37 DAA and after harvest, and the total soil microbial population at 2 DAA and after harvest. Soil carbon was measured using Walkey and Black method measured by spectrophotometer, soil pH using a soil: water ratio = 1: 5 and measured by a pH meter, the total microbial population using Total Plate Counting (TPC) method. The results showed carbon and soil microbial populations decreased over time, except for microbial communities in a single compost treatment.

Modelling of microbial processes that govern degradation of organic substrates in soil, with special reference to pesticides

1990 ◽  
Vol 329 (1255) ◽  
pp. 369-373 ◽  
Keyword(s):  
Microbial Population ◽  
Large Fraction ◽  
Organic Substrates ◽  
High Concentration ◽  
Deterministic Models ◽  
Soil Microbial ◽  
Low Concentrations ◽  
Biokinetic Parameters ◽  
Soil Microbial Population ◽  
Kinetics Of

We tried to develop deterministic models for kinetics of 2,4-D breakdown in the soil based on the following considerations: (i) at low concentrations degradation results from maintenance consumption by a large fraction of the soil microbial population; (ii) at high concentration in addition to the maintenance consumption there is a growth-associated carbon incorporation by a small specific microbial population. Values for the biokinetic parameters are consistent with those commonly found in the literature. Comparison between observed and simulated curves suggests that a non-negligible part of the pesticidal carbon exists as microbial by-products.

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