Influence of various forms of green manure amendment on soil microbial community composition, enzyme activity and nutrient levels in leek

Elfstrand, Sara; Båth, Birgitta; Mårtensson, Anna

doi:10.1016/j.apsoil.2006.11.001

Cited by 149 publications

(68 citation statements)

References 32 publications

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“…Therefore, this result may be due to the non contribution of the quantity of litter added to soil by this pasture, in short-term, for soil microbial biomass content, but promoted an increase in DHA. Others studies showed that organic materials, like plant litter stimulate soil DHA (Garcia et al, 1998;Elfstrand et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Changes in soil microbial biomass and activity in different Brazilian pastures

Lopes

Salviano

Araújo

et al. 1970

Span. j. agric. res.

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Microbial biomass and activity are useful indices for assessing changes in soil ecosystems. The impact of different pastures on microbial biomass and activity was studied in a long-term experiment in Northeast Brazil. For our study the pastures were divided into plots: a) Brachiaria brizantha; b) Leucaena leucocephala; c) Cynodon dactilon; d) Panicum maximum. An adjacent area with native vegetation was used as reference. Soil samples were collected in 0-10 and 10-20 cm depths. No significant differences in soil organic C (Corg) was found among all plots at 0-10 and 10-20 cm depth. Soil microbial C (Cmic) values were higher in native forest and P. maximum when compared to the other plots. The soil basal respiration (CO2) values were similar among all plots evaluated. However, respiratory quotients (qCO2) were significantly lower in native forest and P. maximum when compared to other plots, at 0-10 cm depth. Values of fluorescein diacetate (FDA) hydrolysis were significantly higher in native forest and P. maximum, while values of dehydrogenase activity were found to be signif icantly higher in native forest, C. dactilon and P. maximum. Soil microbial biomass and activity changed when a native forest was converted to pastures. These changes were positive with the inclusion of P. maximum by the high input of C sources.

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Section: Discussionmentioning

confidence: 99%

Changes in soil microbial biomass and activity in different Brazilian pastures

Lopes

Salviano

Araújo

et al. 1970

Span. j. agric. res.

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“…Despite the advantages of using leguminous plants as soil coverage (Elfstrand et al, 2007;Wutke et al, 2009), which include the ability to use nitrogen from atmosphere, the presence of deep root systems and a high biomass production, the low C/N ratio of the tissues of leguminous plants favors the decomposition process and limits the establishment of soil coverage. However, plant species which show a higher C/N ratio, have lower plant residue decomposition rates, and consequently, are more efficient as soil coverage (Carvalho et al, 2008(Carvalho et al, , 2009.…”

Section: Introductionmentioning

confidence: 99%

Cover plants with potential use for crop-livestock integrated systems in the Cerrado region

Carvalho¹,

Souza²,

Júnior³

et al. 2011

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effects of lignin, hemicellulose, and cellulose concentrations in the decomposition process of cover plant residues with potential use in no-tillage with corn, for crop-livestock integrated system, in the Cerrado region. The experiment was carried out at Embrapa Cerrados, in Planaltina, DF, Brazil in a split plot experimental design. The plots were represented by the plant species and the subplots by harvesting times, with three replicates. The cover plants Urochloa ruziziensis, Canavalia brasiliensis, Cajanus cajan, Pennisetum glaucum, Mucuna aterrima, Raphanus sativus, Sorghum bicolor were evaluated together with spontaneous plants in the fallow. Cover plants with lower lignin concentrations and, consequently, higher residue decomposition such as C. brasiliensis and U. ruziziensis promoted higher corn yield. High concentrations of lignin inhibit plant residue decomposition and this is favorable for the soil cover. Lower concentrations of lignin result in accelerated plant decomposition, more efficient nutrient cycling, and higher corn yield.

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“…As for the influences of fertilizer on soil microbial organisms, it was reported that the amount of soil nitrogen in fields under conventional production systems has been negatively correlated with soil microbial components, whereas soil nitrogen in fields under organic production was positively correlated with soil microbial components [8]. For example, red clover manure increased and maintained higher bacterial and fungal biomass and high rates of enzyme (arylsulphatase) activity compared to control treated with chemical fertilizer [9]. Collectively, green manure or organic fertilizer was equally as well in improving soil nutrients and crop production as chemical fertilizer [10], but more environmentally friendly, playing a significant role in sustainable agriculture.…”

Section: Introductionmentioning

confidence: 99%