Metal availability, soil nutrient, and enzyme activity in response to application of organic amendments in Cd-contaminated soil

SUMMARYThe transition from conventional to organic farming is accompanied by changes in soil chemical properties and processes that could affect soil fertility. The organic system is very complex and the present work carries out a short-term comparison of the effects of organic and conventional agriculture on the chemical properties of a silty loam soil (Xerofluvent) located in the Guadalquivir River Valley, Seville, Spain, through a succession of five crop cycles over a 3-year period. Crop rotation and varieties were compared in a conventional system using inorganic fertilizer and two organic systems using either plant compost or manure. At the end of the study, organic farming management resulted in higher soil organic carbon (OC), N and available P, K, Fe and Zn. The available Mn and especially Cu values did not show significant differences. In general, treatment with manure resulted in more rapid increases in soil nutrient values than did plant compost, which had an effect on several crop cycles later. The present study demonstrated that the use of organic composts results in an increase in OC and the storage of nutrients, which can provide long-term fertility benefits. Nevertheless, at least 2–3 years of organic management are necessary, depending on compost characteristics, to observe significant differences. Average crop yields were 23% lower in organic crops. Nevertheless, only two crops showed statistically significant differences.

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Remediation of heavy metal polluted soil through organic amendments

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v42i4.35786 ◽

2018 ◽

Vol 42 (4) ◽

pp. 589-598 ◽

Cited By ~ 1

Author(s):

HM Naser ◽

MZ Rahman ◽

S Sultana ◽

MA Quddus ◽

MA Haoque

Keyword(s):

Contaminated Soil ◽

Water Hyacinth ◽

Metal Content ◽

Metal Uptake ◽

Organic Materials ◽

Poultry Manure ◽

Organic Amendments ◽

Cow Manure ◽

Barnyard Grass ◽

Type Water

This study was conducted to determine the effects of organic materials to remediate contaminated soil with heavy metals. A pot study was performed by growing maize (Zea mays) in metal contaminated soil (10 kg pot-1) and soils amendments with cow manure dust, poultry manure dust, vermicompost dust, fern dust, water hyacinth dust, mustard stover dust and barnyard grass dust each at 5 g kg-1 soil. The results showed that Pb, Cd, Ni, Cr and Co uptake by maize depended on the organic materials type. Water hyacinth dust, fern dust, mustard stover dust, and barnyard grass dust addition led to decreased metal content in maize, and this decrease was better expressed with 20.5 to 33.3% for fern dust, 17.3 to 22.0 % for water hyacinth, 18.6 to 21.3% for mustard stover dust, 17.33 to 20.5% for barnyard grass dust. Cow manure dust, poultry manure dust and vermicompost dust led to increased metal content in the maize, and this increase was 6.80 to 18.7 % for cow manure, 18.9 to 86.7 % for poultry manure and 17.4 to 16.0 % for vermicompost. The different effectiveness of organic amendment on metal uptake by maize plant could be due to the nature of organic matter where water hyacinth dust, fern dust, mustard stover dust, and barnyard grass dust were mainly originated from plant. On the other hand, cow manure, poultry manure and vermicompost were mainly the excreta collected from cattle, poultry and earthworms. However, immobilization and phytoextraction techniques might be used to remediate soils which are contaminated with heavy metal.Bangladesh J. Agril. Res. 42(4): 589-598, December 2017

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Changes in Metal Availability and Improvements in Microbial Properties After Phytoextraction of a Cd, Zn and Pb Contaminated Soil

Bulletin of Environmental Contamination and Toxicology ◽

10.1007/s00128-018-2478-2 ◽

2018 ◽

Vol 101 (5) ◽

pp. 624-630

Author(s):

Wenhao Yang ◽

Pei Li ◽

Christopher Rensing ◽

San’an Nie

Keyword(s):

Contaminated Soil ◽

Metal Availability ◽

Microbial Properties

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Effects of Hyperaccumulator Straw on Soil Nutrient Availability and Soil Enzyme Activity of Cyphomandra betacea under Cadmium Stress

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015 ◽

10.2991/icaees-15.2015.39 ◽

2015 ◽

Author(s):

Jing He ◽

Qianqian Ma ◽

Lijin Lin ◽

Liao Liao

Keyword(s):

Enzyme Activity ◽

Nutrient Availability ◽

Soil Nutrient ◽

Cadmium Stress ◽

Soil Enzyme ◽

Soil Enzyme Activity ◽

Soil Nutrient Availability ◽

Cyphomandra Betacea

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Remediation of Organically Contaminated Soil Through the Combination of Assisted Phytoremediation and Bioaugmentation

Applied Sciences ◽

10.3390/app9224757 ◽

2019 ◽

Vol 9 (22) ◽

pp. 4757 ◽

Cited By ~ 2

Author(s):

Mikel Anza ◽

Oihane Salazar ◽

Lur Epelde ◽

José María Becerril ◽

Itziar Alkorta ◽

...

Keyword(s):

Plant Growth ◽

Contaminated Soil ◽

Sodium Dodecyl ◽

Soil Health ◽

Organic Amendments ◽

Bacterial Consortium ◽

Soil Microbial Activity ◽

Total Petroleum Hydrocarbons ◽

Paenibacillus Sp ◽

Cow Slurry

Here, we aimed to bioremediate organically contaminated soil with Brassica napus and a bacterial consortium. The bioaugmentation consortium consisted of four endophyte strains that showed plant growth-promoting traits (three Pseudomonas and one Microbacterium) plus three strains with the capacity to degrade organic compounds (Burkholderia xenovorans LB400, Paenibacillus sp. and Lysinibacillus sp.). The organically contaminated soil was supplemented with rhamnolipid biosurfactant and sodium dodecyl benzenesulfonate to increase the degradability of the sorbed contaminants. Soils were treated with organic amendments (composted horse manure vs. dried cow slurry) to promote plant growth and stimulate soil microbial activity. Apart from quantification of the expected decrease in contaminant concentrations (total petroleum hydrocarbons, polycyclic aromatic hydrocarbons), the effectiveness of our approach was assessed in terms of the recovery of soil health, as reflected by the values of different microbial indicators of soil health. Although the applied treatments did not achieve a significant decrease in contaminant concentrations, a significant improvement of soil health was observed in our amended soils (especially in soils amended with dried cow slurry), pointing out a not-so-uncommon situation in which remediation efforts fail from the point of view of the reduction in contaminant concentrations while succeeding to recover soil health.

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