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

Jha, Dhruva Kumar; Sharma, Gaurav; Mishra, Ruchi

doi:10.1016/0038-0717(92)90250-2

Cited by 91 publications

(28 citation statements)

References 14 publications

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“…In general, a significant variation has been observed in the urease activity dependent on the soil vegetation type (Bandick & Dick, 1999;Waldrop et al, 2000). A higher urease activity in less degraded areas than in more degraded sites, due to the higher soil organic C contents and microbial populations sizes was found (Jha et al, 1992). Accordingly, in the present study, there was a positive correlation between urease activity and microorganism populations or to-tal organic C. Similarly, a positive correlation between the urease activity and the organic C was found (Singh et al, 1991).…”

Section: Resultsmentioning

confidence: 94%

“…As a consequence, thousands of hectares were flooded and soils were degraded in vast areas due to compaction or the removal of A/B horizons that exposed the subsoil. The reforestation of degraded areas contributes to restoring original soil physico-chemical characteristics by increasing the organic matter content, nutrient availability and the microbial populations and activity (Jha et al, 1992). Plant species is an important factor influencing the soil C and N content.…”

Section: Introductionmentioning

confidence: 99%

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Recovery of soil microbiological properties in a degraded area planted with Corymbia citriodora and Leucaena leucocephala

Valpassos

Maltoni

Cassiolato

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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The influence of reforestation was evaluated during two season periods (February and October) in sites planted with Corymbia citriodora and Leucaena leucocephala through microorganism counts (bacteria, fungi, actinomycetes, and nitrite oxidizers) and microbial activity (respiratory and urease activities). An Atlantic forest and a bare soil site were used as controls. The general trends of the variables in the different soils were: Atlantic forest or L. leucocephala > C. citriodora > bare soil. The microbial populations in L. leucocephala and C. citriodora soils were significantly higher (P < 0.05) than that found in the bare soil. Similar results were obtained for respiratory and urease activities. The microbiological variables of the soil under L. leucocephala were comparable or even superior to that found under Atlantic forest. An improvement in the microbiological soil variables was observed in the soil under C. citriodora when compared to the soil without vegetation. These results can be attributed to an increasing amount of total organic C of the soils under L. leucocephala and C. citriodora in relation to the soil without vegetation.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Recovery of soil microbiological properties in a degraded area planted with Corymbia citriodora and Leucaena leucocephala

Valpassos

Maltoni

Cassiolato

et al. 2007

Sci. agric. (Piracicaba, Braz.)

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“…The bacterial community, their respiratory action and particular soil chemical complexes designate the transformation development that occurs in soils under exact forest litters (Luizao et al 1992). Furthermore, edaphic and climatic features affect the action of soil microbial enzymes (Jha et al 1992). It is expected that the nutrients released during litter decay can account for 67-87% of the annual demand for forest plants (Waring and Schleslnger 1985).…”

Section: Microbial Litter Decomposition and Biogeochemical Cyclingmentioning

confidence: 99%

Litter decomposition in forest ecosystems: a review

Krishna

Mohan

2017

Energ. Ecol. Environ.

430

215

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Litter decomposition in terrestrial ecosystems has a major role in the biogeochemical cycling of elements in the environment. Climatic features, like temperature, rainfall, humidity, and seasonal variations affect the rate of litter decomposition. This review attempts to understand the litter decomposition process in tropical forest ecosystems. It also reviews the influence of various factors on litter degradation and techniques used for assessing leaf litter decomposition. It is observed that very few studies were conducted on litter decomposition in forest ecosystems, such as tropical and temperate forests. Hence, comprehensive studies on litter degradation have to be undertaken in order to understand the turnover rate of nutrients and other elements in these sensitive ecosystems.

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“…Increases in the bacterial community during the summer have been attributed to increases in air temperature (Chhonkar & Tarafdar, 1984); however, decreases on fungi and increases on bacteria relative quantities, respectively, were observed with increasing soil fertility (Pennanen et al, 1999). In India, records on the number of soil bacteria from several forests were higher in September and lower in July, probably because of the rain and temperature regimes (Jha et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…The soil microbial enzyme activity is affected by edaphic and climatic factors (Jha et al, 1992). For example, in Indonesia, a study demonstrated that the dehydrogenase activity was positively correlated with soil moisture and N concentrations (Gunadi et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus

Rigobelo

Nahas

2004

Sci. agric. (Piracicaba, Braz.)

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The accumulation and decomposition of litter in soils under forests depend on climatic and biotic conditions. This work evaluated the effect of monthly rainfall and temperature on total bacteria, and on the dehydrogenase and respiration microbial activities. The effects of organic matter, total organic C and soil moisture were also evaluated. Performed from April, 1999 to March, 2000 in an Eucalyptus-cultivated and Pinus-cultivated Oxisol (Typic Haplustox), the study showed that climate and the soil variables affect the total number of bacteria and the microbial activities. The highest air temperatures and rainfall intensities were found during the Summer and, consequently, all the studied variables were maximal during this period. Minimal values varied from Autumn to Winter or, for some parameters, up to Spring. A positive correlation proved the influence of the organic matter, organic C and soil moisture on the total bacteria and on the respiratory and dehydrogenase activities. Litter content was also higher in the Summer as compared to the Winter, but it correlated only with the total bacteria (r = 0.52 *** ). However, the correlation between the litter content and organic matter (r = 0.64 *** ) and soil moisture (r = 0.49 ** ) suggest that the soil organic matter may have influenced microbial activity. All variables found in the Eucalyptus soil were higher than that of Pinus soil, probably favored by the best soil fertility and higher pH value. Key words: MPN, dehydrogenase, microbial respiration, litter, temperature FLUTUAÇÃO SAZONAL DA COMUNIDADE BACTERIANA E DA ATIVIDADE MICROBIANA EM SOLOS SOB EUCALIPTO E PINUS RESUMO: O acúmulo e decomposição da serapilheira em solos de florestas dependem das condições climáticas e bióticas. Este trabalho avaliou as variações mensais no número de bactérias totais e nas atividades da desidrogenase e da respiração microbiana, relacionando-as à quantidade de serapilheira depositada e aos teores de matéria orgânica e de água do solo. O estudo foi realizado de abril de 1999 a março de 2000 em um Latossolo Vermelho-Escuro plantado com eucalipto e com Pinus. Houve influência do clima e das variáveis do solo nas bactérias totais e a atividade microbiana. Todas as variáveis ajustaram-se a equações de 3 o grau. Durante o verão, foram obtidos os maiores valores de temperatura e de chuvas e, consequentemente, todas as variáveis estudadas apresentaram seus valores máximos neste período, e os valores mínimos no outonoinverno ou, para alguns parâmetros, até mesmo na primavera. A correlação positiva comprovou a influência da matéria orgânica e da água do solo no número de bactérias e nas atividades respiratórias e da desidrogenase. O teor de serapilheira sobre o solo também foi maior no verão do que no inverno, mas só apresentou correlação com as contagens de bactérias (r = 0,52 *** ). Contudo, a correlação entre os teores de serapilheira e os de matéria orgânica (r = 0,64 *** ) e de água do solo (r = 0,49 ** ) demonstra que a matéria orgânica pode ter influenciado a atividad...

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

Cited by 91 publications

References 14 publications

Recovery of soil microbiological properties in a degraded area planted with Corymbia citriodora and Leucaena leucocephala

Recovery of soil microbiological properties in a degraded area planted with Corymbia citriodora and Leucaena leucocephala

Litter decomposition in forest ecosystems: a review

Seasonal fluctuations of bacterial population and microbial activity in soils cultivated with eucalyptus and pinus

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