Effects of irrigation-induced salinity and sodicity on soil microbial activity

Rietz, Diana Nicolle.; Haynes, R. J.

doi:10.1016/s0038-0717(03)00125-1

Cited by 729 publications

(402 citation statements)

References 30 publications

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“…Our results also suggest that the use of land for crop production in subtropical wetlands can increase soil CO 2 emissions, as has been observed in previous studies (Shang et al, 2013). The negative relationship between salinity and C release may be due to the inhibition of growth and activity of soil microorganisms by osmotic stress at higher salinities (Rietz and Haynes, 2003). Previous studies have observed that soil C release was negatively correlated with salinity (Setia et al, 2011).…”

Section: Balance and The Response To Changes In Nutrient Stoichiometrysupporting

confidence: 86%

Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China

Wang

Chün

Sardans

et al. 2015

CATENA

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We examined the impact of human changes in land use on the concentrations and stoichiometric relationships among soil carbon (C), nitrogen (N), phosphorus (P) and potassium (K) in a Phragmites australis riparian wetland (Minjiang River estuary, China). We compared a natural (unaltered) wetland with five altered land uses: intertidal mudflat culture and vegetable, flower, fruit and rice cultivations. All these land uses decreased C, N and K soil concentrations relative to those in the P. australis wetland. The close relationship between total soil C and N concentrations, under all land uses, suggested that N was the most limiting nutrient in these wetlands. The lower N concentrations, despite the use of N fertilizers, indicated the difficulty of avoiding N limitation in the agricultural land. Croplands, except rice cultivation, had lower soil N:P ratios than the original P. australis wetland, consistent with the tendency of favoring species adapted to high rates of growth (low N:P ratio). The release of soil C was less and the soil C:N and C:P ratios higher in the natural P. australis riparian wetland than in the croplands, whereas C storage was more similar. The levels of soil C storage were generally opposite to those of C release, indicating that C release by respiration was the most important factor controlling C storage. Cropland soil management promotes faster nutrient and C cycles and changes in soil nutrient stoichiometry. These impacts can further hinder the regeneration of natural vegetation by nutrient imbalances and increase C-cycling and C emissions.

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Section: Balance and The Response To Changes In Nutrient Stoichiometrysupporting

confidence: 86%

Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China

Wang

Chün

Sardans

et al. 2015

CATENA

View full text Add to dashboard Cite

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“…4-5) showing that not only matric potential, but also osmotic potential affects microbial activity. The negative effect of salinity on microbial activity is in agreement with many other studies (Pathak and Rao, 1998;Rietz and Haynes, 2003;Yuan et al, 2007), but in most of these studies, only the EC is given. However, the EC is a poor measure of salinity stress to microbes, because it does not necessarily reflect the salt concentration in the soil solution.…”

Section: Discussionsupporting

confidence: 90%

Effects of Rewetting of Air-Dry Soil and Adaptation to Low Matric and Osmotic Potential

Chowdhury¹

2015

International J. of Soil Science

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When conducting incubation experiments to measure soil respiration in response to a given treatment in soils of different texture, it is important to have baseline information about the soils and to ensure that the effect of the storage or pre-incubation conditions on the results are minimized. Three experiments were conducted with up to seven soils (3 non-saline, 4 saline) to investigate (1) The relationship between soil water content or water potential and soil respiration, (2) The time required until soil respiration is stabilized after rewetting of air-dry soil and (3) If pre-incubation at a given matric or osmotic potential changes the response of soil respiration to matric or osmotic potential. The texture of the soils varied from sand to sandy loam. Cumulative respiration showed an optimum curve in response to differential soil water content in all 7 soils, but the maximal cumulative respiration was reached at different water content in the soil, being 45 g kgG 1 for the non-saline sand and 200 g kgG 1 for the non-saline sandy loam. However, when expressed against water potential, maximal cumulative respiration was achieved between 0 and -1 MPa in all soils. Rewetting of air-dry soil induced a flush of respiration in the first 1-2 days, but respiration rates stabilized 7-8 days after rewetting in all soils. Pre-incubation at low matric or osmotic potential for two weeks did not significantly affect soil respiration at low matric or osmotic potential in the following two weeks compared to soils which had been pre-incubated at optimal matric potential and high osmotic potential. In conclusion, when comparing the response of respiration to water availability among soils of different texture it is important to consider water potential and not water content. Furthermore, an adaptation period of 2 weeks does not seem to increase the tolerance of soil respiration to low osmotic or matric potential compared to non-adapted soils.

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“…OM served as a precursor for enzyme synthesis (increasing soil microbial biomass, which is an enzyme source) and played a vital role in the physical stabilization of the enzyme. The positive effects of organic matter on AlP activities exerted indirectly available P. According to Rietz and Haynes (2003), the substantial AlP activities could persist even at high soil salinity and sodicity. Zahran (1997) noted that the production and activity of enzymes from the saline soil bacteria demonstrated salt requirements greater than those of the corresponding enzymes from non-saline bacteria.…”

Section: Resultsmentioning

confidence: 99%

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

Lemanowicz

Krzyżaniak

2015

Environ Earth Sci

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The paper demonstrates distribution of the content of total and available phosphorus and activity of the alkaline and acid phosphatase against the selected properties of salt-affected Mollic Gleysols. In the adequately prepared soil, the following were determined: pH, total organic carbon, the exchangeable cations (Ca, Mg, Na, K), salinity, the content of phosphorus, the activity of phosphomonoesterases. The distribution of the elements in the soil profiles was described with the value of the Distribution Index. To evaluate the availability of phosphorus, the Index of Mobility was used. The content of phosphorus varies, and it depends on physicochemical soil properties. Both the content of phosphorus available to plants and the activity of phosphatases in the profiles showed a high variation that depends both on the sampling date and on the depth. The lowest content of phosphorus was found in the profiles sampled in spring, during an intensive plant growth, while the greatest content was received in soil profiles sampled in summer. The research showed also a high variation in the time of the activity of phosphatases as well as their changes depending on the soil parameters, which was confirmed by the recorded values of the correlations between the activity of alkaline and acid phosphomonoesterases and the content of carbon, respectively, (r = 0.47, P \ 0.05) and (r = 0.62, P \ 0.05) as well as available phosphorus (r = 0.32, P \ 0.05) and (r = 0.38, P \ 0.05). A many-year seasonal salinity of soil did not decrease the activity of the phosphomonoesterases since it was mostly connected with the natural content of organic carbon.

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Effects of irrigation-induced salinity and sodicity on soil microbial activity

Cited by 729 publications

References 30 publications

Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China

Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China

Effects of Rewetting of Air-Dry Soil and Adaptation to Low Matric and Osmotic Potential

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

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