Corrigenda - Temporal fluctuations in biochemical properties of soil under pasture. I. Respiratory activity and microbial biomass

Temporal fluctuations in respiratory activity (CO2 production) and two indices of microbial biomass (biomass carbon and mineral-nitrogen flush contents) were determined in topsoil, predominantly a Typic Haplaquoll, from a site under grazed pastures in the Wairarapa area. Samples, with organic carbon contents averaging 6.7 and 3.6%, were taken from two separate plots at c. 4-weekly intervals for over a year. Biomass indices were estimated by the chloroform fumigation technique. The suitability of a physiological procedure for indicating biomass fluctuations was also investigated. Correlations between properties were calculated with plot effects removed. Rates of CO2 production by field-moist soil, and soil at a standardized water potential, were lowest in samples taken at the driest time of the year and correlated significantly with field-moisture content. In contrast, biomass carbon estimates were generally highest in late summer and autumn, and lowest in winter, and were correlated negatively with soil moisture content. Mineral-nitrogen flush fluctuations were less marked, and not significantly related to soil moisture or biomass carbon content. In the physiological procedure, using field-moist soil, neither rates of CO2 production by soil + glucose, nor net glucose response values, were correlated significantly with biomass carbon estimated by the fumigation technique. This procedure therefore appears unsuitable for estimating temporal fluctuations in the biomass of an individual soil under pasture.

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Influence of Plastic Mulching on Soil Moisture, Nutrient and Microbial Biomass in Pineapple Cultivation on Undulating Hilly Areas of Nagaland

Agropedology ◽

10.47114/j.agroped.2019.j8 ◽

2019 ◽

Vol 29 (1) ◽

Author(s):

Christy Sangma ◽

◽

A. Thirugnanavel ◽

Ph. Romen Sharma ◽

G. Rajesha ◽

...

Keyword(s):

Soil Moisture ◽

Microbial Biomass ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Moisture Content ◽

Microbial Biomass Carbon ◽

Fertility Level ◽

Biomass Carbon ◽

Available N ◽

Plastic Mulching

The pineapple var. Kew was planted on black polythene film mulching with double hedgerow planting to find out the influence of mulches on soil and plant. The soil samples were collected twice (kharif and rabi) at two different depths (0-15 and 15-30 cm), and the pH, soil organic carbon (SOC), nitrogen, phosphorus, potassium, basal respiration and soil microbial biomass carbon were analysed. The data revealed that soil organic carbon and available N, P, and K content were slightly higher in the bottom hill than the top hill. The mulched field had higher nutrients than the non-mulched field. The fertility level varied slightly between the seasons. The biological parameters (microbial biomass carbon) were observed to be significantly higher (P≤0.05) in the bottom hill in both the seasons than the non-mulched field. The soil moisture content ranged from 5.9 % in March to 24.24 % August in the bottom hill (15-30 cm depth). The moisture content in the non-mulched field was lower than the mulched field.

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Influence of Plastic Mulching on Soil Moisture, Nutrient and Microbial Biomass in Pineapple Cultivation on Undulating Hilly Areas of Nagaland

10.47114/j.agroped.2019.jun8 ◽

2019 ◽

Vol 29 (1) ◽

Author(s):

Christy Sangma ◽

◽

A. Thirugnanavel ◽

Ph. Romen Sharma ◽

G. Rajesha ◽

...

Keyword(s):

Soil Moisture ◽

Microbial Biomass ◽

Organic Carbon ◽

Soil Organic Carbon ◽

Moisture Content ◽

Microbial Biomass Carbon ◽

Fertility Level ◽

Biomass Carbon ◽

Available N ◽

Plastic Mulching

The pineapple var. Kew was planted on black polythene film mulching with double hedgerow planting to find out the influence of mulches on soil and plant. The soil samples were collected twice (kharif and rabi) at two different depths (0-15 and 15-30 cm), and the pH, soil organic carbon (SOC), nitrogen, phosphorus, potassium, basal respiration and soil microbial biomass carbon were analysed. The data revealed that soil organic carbon and available N, P, and K content were slightly higher in the bottom hill than the top hill. The mulched field had higher nutrients than the non-mulched field. The fertility level varied slightly between the seasons. The biological parameters (microbial biomass carbon) were observed to be significantly higher (P≤0.05) in the bottom hill in both the seasons than the non-mulched field. The soil moisture content ranged from 5.9 % in March to 24.24 % August in the bottom hill (15-30 cm depth). The moisture content in the non-mulched field was lower than the mulched field.

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Temporal fluctuations in biochemical properties of soil under pasture. II. Nitrogen mineralization and enzyme activities

Soil Research ◽

10.1071/sr9840319 ◽

1984 ◽

Vol 22 (3) ◽

pp. 319 ◽

Cited By ~ 18

Author(s):

DJ Ross ◽

TW Speir ◽

JC Cowling ◽

KN Whale

Keyword(s):

Soil Moisture ◽

Organic Carbon ◽

Moisture Content ◽

Nitrogen Mineralization ◽

Enzyme Activities ◽

Soil Moisture Content ◽

Invertase Activity ◽

Biochemical Properties ◽

Co2 Production ◽

Temporal Fluctuations

Temporal fluctuations in rates of nitrogen mineralization and the activities of six enzymes were measured in topsoil, predominantly a Typic Haplaquoll, from two plots that contained pastures of different age in the Wairarapa area. Samples were taken at c. 4-weekly intervals for over one year. Organic carbon contents averaged 6.7 and 3.6% in soil from the older and younger pastures respectively. Net mineral-nitrogen production at 25�C was higher in soil at a standardized water potential (-3 and -4 kPa for soil from the older and younger pastures respectively) than at field moisture content. It was initially higher in soil from the younger than from the older pasture. Generally, distinct seasonal patterns were not apparent. All of the enzyme activities showed significant temporal fluctuations. Amylase and cellulase activities fluctuated more than invertase activity, but all three carbohydrase activities were generally high in wet spring samples. When plot effects were removed, only the fluctuations in amylase activity were related positively and significantly to soil moisture content. Fluctuations in cellulase, urease, phosphatase and sulphatase activities were correlated negatively with soil moisture content. The temporal fluctuations in enzyme activities were, when plot effects were removed, mainly independent of the small variations that occurred in soil organic carbon and total nitrogen contents. Interrelationships of these biochemical properties, and relationships with rates of CO2 production and indices of microbial biomass, are discussed.

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Spatial heterogeneity of soil moisture, microbial biomass carbon and soil respiration at stand scale of an arid scrubland

Environmental Earth Sciences ◽

10.1007/s12665-013-2386-z ◽

2013 ◽

Vol 70 (7) ◽

pp. 3217-3224 ◽

Cited By ~ 16

Author(s):

Yu-gang Wang ◽

Hong Zhu ◽

Yan Li

Keyword(s):

Soil Moisture ◽

Microbial Biomass ◽

Soil Respiration ◽

Spatial Heterogeneity ◽

Microbial Biomass Carbon ◽

Biomass Carbon

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Influence of soil mineral nitrogen content on soil respiratory activity and measurements of microbial carbon and nitrogen by fumigation-incubation procedures

Soil Research ◽

10.1071/sr9900311 ◽

1990 ◽

Vol 28 (2) ◽

pp. 311 ◽

Cited By ~ 21

Author(s):

DJ Ross

Keyword(s):

Microbial Biomass ◽

Respiratory Activity ◽

Microbial Biomass Carbon ◽

Low Fertility ◽

Co2 Production ◽

Soil Mineral ◽

Grassland Soils ◽

Mineral N ◽

N Content ◽

Carbon And Nitrogen

The influence of soil mineral-N (min-N) content on rates of respiratory activity (CO2 production), and measurements of microbial biomass carbon and nitrogen by fumigation-incubation procedures, was investigated with three fertile soils and one low-fertility soil. These soils were sampled at each of the four seasons from pastures in which intensive grazing can result in high levels of min-N. Values of CO2-C flush and thin-N flush [the difference between CO2-C and min-N produced by fumigated samples and an unfumigated contl ol (or, for CO2-C only, fumigated control)] were used as indices of biomass C and N. Soil min-N content was adjusted by the addition of ammonium sulfate (approx. 50 �g NH4+-Ng-1 soil). In the low fertility soil and two of the fertile soils, added min-N had no significant effect on CO2 production or CO2-C flush values. In the other soil (Castlepoint), the added min-N usually lowered CO2 production in unfumigated samples, and increased CO2-C flush values when an unfumigated control was used; CO2-C flush values were not affected when a fumigated control was used. Use of a fumigated control for estimating biomass C in these grassland soils is recommended. Added min-N had few significant effects on the min-N flush values of the three fertile soils. In the low-fertility soil (Pomare), the min-N flush values of summer and autumn samples were appreciably higher in the presence of added min-N, with the results suggesting that the min-N flush values of the samples without added min-N were erroneously low because of N immobilization. Overall, min-N flush measurements appear to provide a satisfactory index of microbial biomass in fertile soils under pasture, but care in the interpretation of min-N flush values from low-fertility grassland soils seems advisable.

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Comparative analysis of certain soil microbiological characteristics of the carbon cycle

Acta Agraria Debreceniensis ◽

10.34101/actaagrar/69/1802 ◽

2016 ◽

pp. 137-141

Author(s):

Bence Mátyás ◽

Judit Horváth ◽

János Kátai

Keyword(s):

Microbial Biomass ◽

Soil Respiration ◽

Carbon Cycle ◽

Microbial Biomass Carbon ◽

Co2 Production ◽

Biomass Carbon ◽

Soil Microbial ◽

Microbiological Characteristics ◽

Long Term Experiment

In our researches, we examine the soil microbial parameters related to the carbon cycle. In this study, we compare the changes of microbial biomass carbon (MBC) and the soil CO2 production in soil samples which were taken in spring and autumn. The 30 years old long-term experiment of Debrecen-Látókép is continued in our experiments. The long-term fertilization experiment was set in 1983, and our sample was taken in spring 2014. The examinations of soil respiration processes and factors that influence soil respiration are required in optimal management. In our study, we interested to know how the growing levels of fertilization influence the soil respiration and microbial biomass carbon under non-irrigated and irrigated conditions in maize mono, bi, and triculture.

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Biochar and wheat straw affecting soil chemistry and microbial biomass carbon countrywide

Biomass Conversion and Biorefinery ◽

10.1007/s13399-021-01471-4 ◽

2021 ◽

Author(s):

Younes Shokuhifar ◽

Ahmad Mohammadi Ghahsareh ◽

Karim Shahbazi ◽

Mohammad Mehdi Tehrani ◽

Hossein Besharati

Keyword(s):

Organic Matter ◽

Soil Moisture ◽

Microbial Biomass ◽

Wheat Straw ◽

Microbial Biomass Carbon ◽

Biological Properties ◽

Soil Samples ◽

Agricultural Fields ◽

Biomass Carbon ◽

Wide Range

AbstractIndicating how different sources of organic matter (OM) may affect the properties of a wide range of soil types, at varying soil moisture (SM), is of significance in the agricultural fields. A large dataset of soil samples (0–30 cm) was collected from different parts of Iran (21 different agricultural regions, with a wide range of physical, chemical, and biological properties) to determine the effects of OM and varying SM on soil chemical (pH, salinity, and organic carbon) and biological (microbial biomass carbon, MBC) properties. The collected soil samples were incubated (9-month period) with the experimental treatments including OM (control (M1), 2% wheat straw (WS) (M2), and 2% biochar (BI) (M3)), at different SM levels (0.2 field capacity, FC (V1), 0.7 variable FC (V2), 0.7 constant FC (V3), and saturated moisture (V4)). Wheat straw was pyrolyzed (at 500°C) to produce BI, and their chemical properties were determined. BI salinity (3.1 dS/m) was significantly higher than WS (2.8 dS/m). The organic treatments, especially BI, significantly increased soil OM and MBC compared with the control treatment. The two sources of organic fertilization increased soil pH, OM, and MBC, though such effects were functions of varying soil moisture (drying and rewetting cycles). Due to higher C percentage (61%), the effects of BI, significantly affected by soil moisture, were more pronounced on soil parameters. The tested sources of organic matter (WS and BI), acting as functions of soil moisture, can strongly affect soil chemical and biological properties and contribute to higher efficiency of agricultural fields.

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