Soil microbial biomass and activity in long-term grassland: Effects of management changes

Lovell, R. D.; Jarvis, S. C.; Bardgett, Richard D.

doi:10.1016/0038-0717(94)00241-r

Cited by 247 publications

(120 citation statements)

References 20 publications

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“…This may have been due to the higher amounts of N that were present in the poultry manure resulting in a lower or optimum C:N ratio, favoring faster microbial colonization. These findings agree with those of several other studies [27] [28]. In addition, a higher amount of MBN was found in the STB fertilizer treatment than in the rice straw and cow dung treatments.…”

Section: Discussionsupporting

confidence: 93%

Organic Amendments with Chemical Fertilizers Improve Soil Fertility and Microbial Biomass in Rice-Rice-Rice Triple Crops Cropping Systems

Anik¹,

Rahman²,

Rahman³

et al. 2017

OJSS

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Medium-term changes in the labile nutrient pool of microbial biomass carbon (MBC) and nitrogen (MBN) resulting from organic manure application in rice (Oryza sativa L.)-based triple cropping systems have been poorly studied.Therefore, the effects of organic materials on the soil physico-chemical properties and microbial biomass in rice fields were investigated at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh, from April 2010 to December 2012. Five treatments (control, cow dung, poultry manure, rice straw, and chemical fertilizer) were laid out in a randomized complete block design with four replications. The organic residues (2 t C ha −1 ) were applied 7 days before transplanting and were combined with inorganic fertilizers, following integrated plant nutrition systems. This paper presents the results from the last of the five consecutive rice growing seasons. All of the organic residues increased the pH, and organic C, N, P, and K contents of the soil. However, poultry manure was more efficient in increasing soil fertility than cow dung and rice straw, resulting in a significant increase in P from 22 mg·kg −1 to 63 mg·kg −1 at crop harvest. All of the organic residues also increased the soil water holding capacity and decreased bulk density. Furthermore, poultry manure resulted in significantly higher microbial biomass C (432 mg·kg −1 ; P < 0.05) and N (31.60 mg·kg −1 ; P < 0.05) levels in the soil at crop harvest, followed by cow dung and rice straw. These findings indicate that the regular application of organic residues and manures will help to enhance soil fertility and production sustainability.

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Section: Discussionsupporting

confidence: 93%

Organic Amendments with Chemical Fertilizers Improve Soil Fertility and Microbial Biomass in Rice-Rice-Rice Triple Crops Cropping Systems

Anik¹,

Rahman²,

Rahman³

et al. 2017

OJSS

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“…Soil extracts from the fresh samples were obtained by shaking soil samples with 60 mL 0.5 M K 2 SO 4 for 30 min. The extracts were filtered through 0.45 µm filters and their extractable organic C analyzed by dichromate digestion as described by Lovell et al (1995). The data of C in the unfumigated soil extracts were used as soil dissolved organic C (DOC) (Liu et al, 2010).…”

Section: Soil Microclimate and Nutrient Measurementsmentioning

confidence: 99%

Effects of belowground litter addition, increased precipitation and clipping on soil carbon and nitrogen mineralization in a temperate steppe

Guo

Xin

et al. 2013

Biogeosciences

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Abstract. Soil carbon (C) and nitrogen (N) cycling are sensitive to changes in environmental factors and play critical roles in the responses of terrestrial ecosystems to natural and anthropogenic perturbations. This study was conducted to quantify the effects of belowground particulate litter (BPL) addition, increased precipitation and their interactions on soil C and N mineralization in two adjacent sites where belowground photosynthate allocation was manipulated through vegetation clipping in a temperate steppe of northeastern China from 2010 to 2011. The results show that BPL addition significantly increase soil C mineralization rate (CMR) and net N mineralization rate (NMR). Although increased precipitation-induced enhancement of soil CMR essentially ceased after the first year, stimulation of soil NMR and net nitrification rate continued into the second year. Clipping only marginally decreased soil CMR and NMR during the two years. There were significant synergistic interactions between BPL addition (and increased precipitation) and clipping on soil CMR and NMR, likely to reflect shifts in soil microbial community structure and a decrease in arbuscular mycorrhizal fungi biomass due to the reduction of belowground photosynthate allocation. These results highlight the importance of plants in mediating the responses of soil C and N mineralization to potentially increased BPL and precipitation by controlling belowground photosynthate allocation in the temperate steppe.

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“…Soil microbial biomass carbon (MBC) and nitrogen (MBN) were determined using the chloroform fumigation extraction method (Vance et al 1987). Total organic C in the fumigated and unfumigated extracts was measured with the dichromate digestion method, and organic N in the fumigated and unfumigated extracts with the alkaline persulfate oxidation method described by Lovell et al (1995). MBC and MBN were calculated from the difference between total extractable C and N in the fumigated and unfumigated samples using efficiency factors (kEC and kEN) of 0.45 and 0.54 (Brookes et al 1985;Vance et al 1987), respectively.…”

Section: Laboratory Analyses For Rhizosphere Soil Samplesmentioning

confidence: 99%

Belowground responses of Picea asperata seedlings to warming and nitrogen fertilization in the eastern Tibetan Plateau

Liu

Yin

Chen

et al. 2011

Ecological Research

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The impacts of global climatic change on belowground ecological processes of terrestrial ecosystems are still not clear. We therefore conducted an experiment in the subalpine coniferous forest ecosystem of the eastern edges of the Tibetan Plateau to study roots of Picea asperata seedlings and rhizosphere soil responses to soil warming and nitrogen availability from April 2007 to December 2008. The seedlings were subjected to two levels of temperature (ambient; infrared heater warming) and two nitrogen levels (0 or 25 g m À2 year À1 N). We used a free air temperature increase from an overhead infrared heater to raise both air and soil temperature by 2.1 and 2.6°C, respectively. The results showed that warming alone significantly increased total biomass, coarse root biomass and fine root biomass of P. asperata seedlings. Both total biomass and fine root biomass were increased, but coarse root biomass was significantly decreased by nitrogen fertilization and warming combined with nitrogen fertilization. Warming induced a prominent increase in soil organic carbon (SOC) and NO 3 À -N of rhizosphere soil, while nitrogen fertilization significantly decreased SOC and NH 4 + -N of rhizosphere soil. The warming, fertilization and warming · N fertilization interaction decreased soil microbial C significantly, but substantially increased soil microbial N. These results suggest that nitrogen deposition combined with warmer temperatures under future climatic change possibly will have no effect on fine root production of P. asperata seedlings, but could enhance the nitrification process of their rhizosphere soils in subalpine coniferous forests.

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Soil microbial biomass and activity in long-term grassland: Effects of management changes

Cited by 247 publications

References 20 publications

Organic Amendments with Chemical Fertilizers Improve Soil Fertility and Microbial Biomass in Rice-Rice-Rice Triple Crops Cropping Systems

Organic Amendments with Chemical Fertilizers Improve Soil Fertility and Microbial Biomass in Rice-Rice-Rice Triple Crops Cropping Systems

Effects of belowground litter addition, increased precipitation and clipping on soil carbon and nitrogen mineralization in a temperate steppe

Belowground responses of Picea asperata seedlings to warming and nitrogen fertilization in the eastern Tibetan Plateau

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