Microbiological Attributes of a Cohesive Yellow Latosol Under Different Land Use Systems

The objective of this study was to evaluate the microbiological attributes of a Cohesive Yellow Latosol. Collections were carried out in three land use systems (LUS). The first, with natural rainforest (NR), the second with sugarcane (SC) cultivated since 2009, and the third under Mimosa cesalpiniifolia (MC) introduced in 1999. Microbiological analyzes were carried out by determining the carbon from microbial biomass, readily mineralizable carbon, microbial respiration, metabolic quotient, total organic carbon, microbial C/total organic C ratio, and occurrence of cellulolytic and ammonifiers microorganisms. Analysis of variance was performed to verify the different measures of microbiological attributes. The variation obtained from CMB was from 3.06 to 4 µg.C.g-1 in NR, 3.02 to 3.92 µg.C.g-1 in MC, and 3.14 to 3.24 µg.C.g-1 in SC. For accumulated CO2, no differences were found between environments, with values ranging from 77 to 55.70 µg.Kg-1 for NR, 80.30 to 49.56 for MC, and 80.30 to 49.56 for SC. qCO2 had no significant effect, and in relation to total organic carbon the forest soil (NR). These results demonstrate that the microbiological attributes of the soil are influenced by cover, environmental standards and soil management, and the sampling time. The forest soil showed superior microbial biomass when compared to other soils. The metabolic control detected a difference between the collection times. For the accumulated CO2 resources, no changes were observed.

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Land Use Effect on Soil Organic Carbon Stocks, Microbial Biomass and Basal Respiration in Bundelkhand Region of Central India

Agricultural Research ◽

10.1007/s40003-021-00584-6 ◽

2021 ◽

Author(s):

Nongmaithem Raju Singh ◽

Dhiraj Kumar ◽

A. K. Handa ◽

Ram Newaj ◽

Mahendra Prasad ◽

...

Keyword(s):

Land Use ◽

Microbial Biomass ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Central India ◽

Basal Respiration ◽

Carbon Stocks ◽

Soil Organic Carbon Stocks

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Microbial and biochemical changes induced by rotation and tillage in a soil under barley production

Canadian Journal of Soil Science ◽

10.4141/cjss93-004 ◽

1993 ◽

Vol 73 (1) ◽

pp. 39-50 ◽

Cited By ~ 94

Author(s):

D. A. Angers ◽

N. Bissonnette ◽

A. Légère ◽

N. Samson

Keyword(s):

Alkaline Phosphatase ◽

Organic Matter ◽

Microbial Biomass ◽

Phosphatase Activity ◽

Alkaline Phosphatase Activity ◽

Soil Layer ◽

Red Clover ◽

Organic C ◽

Top Soil ◽

Total Organic C

Crop rotations and tillage practices can modify not only the total amount of organic matter (OM) in soils but also its composition. The objective of this study was to determine the changes in total organic C, microbial biomass C (MBC), carbohydrates and alkaline phosphatase activity induced by 4 yr of different rotation and tillage combinations on a Kamouraska clay in La Pocatière, Quebec. Two rotations (continuous barley (Hordeum vulgare L.) versus a 2-yr barley–red clover (Trifolium pratense L.) rotation) and three tillage treatments (moldboard plowing (MP), chisel plowing (CP) and no-tillage (NT)) were compared in a split-plot design. Total organic C was affected by the tillage treatments but not by the rotations. In the top soil layer (0–7.5 cm), NT and CP treatments had C contents 20% higher than the MP treatment. In the same soil layer, MBC averaged 300 mg C kg−1 in the MP treatment and up to 600 mg C kg−1 in the NT soil. Hot-water-extractable and acid-hydrolyzable carbohydrates were on average 40% greater under reduced tillage than under MP. Both carbohydrate fractions were also slightly larger in the rotation than in the soil under continuous barley. The ratios of MBC and carbohydrate C to total organic C suggested that there was a significant enrichment of the OM in labile forms as tillage intensity was reduced. Alkaline phosphatase activity was 50% higher under NT and 20% higher under CP treatments than under MP treatment and, on average, 15% larger in the rotation than in the continuous barley treatment. Overall, the management-induced differences were slightly greater in the top layer (0–7.5 cm) than in the lower layer of the Ap horizon (7.5–15 cm). All the properties measured were highly correlated with one another. They also showed significant temporal variations that were, in most cases, independent of the treatments. Four years of conservation tillage and, to a lesser extent, rotation with red clover resulted in greater OM in the top soil layer compared with the more intensive systems. This organic matter was enriched in labile forms. Key words: Soil management, soil quality, organic matter, carbohydrates, microbial biomass, phosphatase

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Carbon, nitrogen and organic C fractions in topsoil affected by conversion from silvopastoral to different land use systems

Agroforestry Systems ◽

10.1007/s10457-010-9314-y ◽

2010 ◽

Vol 81 (3) ◽

pp. 203-211 ◽

Cited By ~ 18

Author(s):

Eduardo S. Matos ◽

Dirk Freese ◽

Eduardo S. Mendonça ◽

Anna Slazak ◽

Reinhard F. Hüttl

Keyword(s):

Land Use ◽

Organic C ◽

Land Use Systems

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Perennial herbaceous legumes as live soil mulches and their effects on C, N and P of the microbial biomass

Scientia Agricola ◽

10.1590/s0103-90162003000100021 ◽

2003 ◽

Vol 60 (1) ◽

pp. 139-147 ◽

Cited By ~ 33

Author(s):

Gustavo Pereira Duda ◽

José Guilherme Marinho Guerra ◽

Marcela Teixeira Monteiro ◽

Helvécio De-Polli ◽

Marcelo Grandi Teixeira

Keyword(s):

Microbial Biomass ◽

Soil Depth ◽

Vegetation Management ◽

Pueraria Phaseoloides ◽

Organic C ◽

Arachis Pintoi ◽

Factorial Combination ◽

C And N ◽

Microbial C ◽

Macroptilium Atropurpureum

The use of living mulch with legumes is increasing but the impact of this management technique on the soil microbial pool is not well known. In this work, the effect of different live mulches was evaluated in relation to the C, N and P pools of the microbial biomass, in a Typic Alfisol of Seropédica, RJ, Brazil. The field experiment was divided in two parts: the first, consisted of treatments set in a 2 x 2 x 4 factorial combination of the following factors: live mulch species (Arachis pintoi and Macroptilium atropurpureum), vegetation management after cutting (leaving residue as a mulch or residue remotion from the plots) and four soil depths. The second part had treatments set in a 4 x 2 x 2 factorial combination of the following factors: absence of live mulch, A. pintoi, Pueraria phaseoloides, and M. atropurpureum, P levels (0 and 88 kg ha-1) and vegetation management after cutting. Variation of microbial C was not observed in relation to soil depth. However, the amount of microbial P and N, water soluble C, available C, and mineralizable C decreased with soil depth. Among the tested legumes, Arachis pintoi promoted an increase of microbial C and available C content of the soil, when compared to the other legume species (Pueraria phaseoloides and Macroptilium atropurpureum). Keeping the shoot as a mulch promoted an increase on soil content of microbial C and N, total organic C and N, and organic C fractions, indicating the importance of this practice to improve soil fertility.

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