Reuse of Animal Manure: A Case Study on Stakeholders’ Perceptions about Pelletized Compost in Northwestern Italy

Pampuro, Niccolò; Caffaro, Federica; Cavallo, Eugenio

doi:10.3390/su10062028

Cited by 37 publications

(24 citation statements)

References 54 publications

(66 reference statements)

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“…The fact that there are microorganisms that are able to metabolize metribuzin in field soil, and organic amendments such as compost and manure may stimulate their activity, suggests that it may be possible to influence the fate and degradation of metribuzin and other chemicals applied to soil, but are difficult to adopt on large surfaces because the difficulties, and the costs to transport the product from the area where it is available to those where it can be applied to soil and the difficulties in application itself (Pampuro et al 2017b). An additional obstacle to adoption of organic amendments is the farmers' knowledge and awareness about the effects of such products in improving biological characteristics of soil (Pampuro et al 2018). The present study suggests that application of non-chemical amendments can lead to faster removal of metribuzin in soil environment.…”

Section: Resultsmentioning

confidence: 70%

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Mehdizadeh

Izadi-Darbandi

Yazdi

et al. 2019

Int J Recycl Org Waste Agricult

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Purpose Persistence of herbicides in soil is a major concerning world issue due to their negative impacts on environment and human health. Laboratory and bioassay experiments were conducted to evaluate the effects of municipal waste compost (MC) and sheep manure (SM) on metribuzin degradation and phytotoxicity of this herbicide. Methods In degradation studies, soil samples were mixed separately with amendments at a rate of 2.5% (w/w) and metribuzin at a concentration of 5 mg kg −1 soil was used for fortification of selected samples. A liquid extraction method was chosen and final extracts were analyzed by HPLC. In bioassay study, the phytotoxic effects of different concentrations of metribuzin (0, 0.01, 0.05, 0.1, 0.2, 0.4, 0.8 and 1 mg kg −1 soil) on oilseed rape (Brassica napus L.) were evaluated. Results The results indicated 88.8% degradation of metribuzin in MC during 120-day period followed by SM recording 72.2%, compared to non-amended soil where 59.8% of metribuzin were removed. The half-life was 119.48 days in nonamended soil as compared to 87.72 and 103.43 days in MC and SM application, respectively. MC was the most efficient treatment to accelerate metribuzin dissipation from the soil. Bioassay results showed that metribuzin residues had a negative effect on root and shoot biomass of oilseed rape. However, the root parameter was more sensitive than the shoot. Conclusions It could be concluded that application of organic amendments to agricultural soils is an eco-friendly strategy to improve soil conditions and non-target crop protection as well as the removal of herbicide residues from soil environment.

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Section: Resultsmentioning

confidence: 70%

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Mehdizadeh

Izadi-Darbandi

Yazdi

et al. 2019

Int J Recycl Org Waste Agricult

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“…The farmers knowledge on how apply organic fertilizers and their possible positive effects (e.g., soil health, suppressiveness, environmental benefits, etc.) is crucial [17]. Hence, soil application of this biofertilizer needs a higher farmer's expertise, to synchronize the mineralization rate with the plant growth, reducing the risk of leaching of excess N.…”

Section: Introductionmentioning

confidence: 99%

Recycling Agricultural Wastes and By-products in Organic Farming: Biofertilizer Production, Yield Performance and Carbon Footprint Analysis

Diacono¹,

Persiani²,

Testani

et al. 2019

Sustainability

130

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The Circular Economy concept implies the re-design of existing production systems in agriculture, by promoting agricultural waste recycling. In an organic zucchini—lettuce rotation, two different agroecological tools were considered: biofertilizer and presence or absence of green manure (GM+ and GM−). In particular, we compared: (i) anaerobic digestate from cattle manure, co-composted with vegetable wastes, with the presence of GM (AD GM+); (ii) olive pomace compost, re-composted, with the presence of GM (OWC GM+); (iii) municipal waste compost with GM (MWC GM+); (iv) municipal waste compost without GM (MWC GM−). These materials were tested with a commercial organic fertilizer without GM (COF GM−) as a positive control. The objectives were: (i) assessing the environmental sustainability of biofertilizers through carbon footprint analysis by greenhouse gas—GHG—emissions; (ii) evaluating the agronomic performance on the vegetable rotation, by energy output assessment. The total carbon emissions of biofertilizers production was 63.9 and 67.0 kg of CO2 eq Mg−1 for AD and OWC, respectively. The co-composting and re-composting processes emitted 31.4 and 8.4 kg CO2 per Mg of compost, respectively. In AD the ventilation phase of composting accounted for 37.2% of total emissions. The total CO2 emission values for the two-crop cycles were the highest in COF GM− and the lowest in OWC GM+, due to different fertilizer sources. On the average of the treatments, the input that induced the highest CO2 emission was irrigation (37.9%). The energy output assessment for zucchini and lettuce highlighted similar performance for all the treatments. Our findings demonstrated the validity of the tested processes to recycle agro-industrial wastes, and the potential of agroecological practices (GM) to mitigate GHG emissions.

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“…Moreover, the studies conducted by Alemi et al [17] and Romano et al [18] highlighted that pelletizing promote the concentration of the nutrients available in the SF improving its fertilizing and amending properties. This process has also the potential for creating a new market for pelletized pig slurry SF, when the properties of this material and the benefits related to biological fertility and biodiversity of soils will be better known among potential users [19].…”

Section: Introductionmentioning

confidence: 99%

Gaseous Emissions after Soil Application of Pellet Made from Composted Pig Slurry Solid Fraction: Effect of Application Method and Pellet Diameter

2018

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The study aimed at determining ammonia and GHG emissions from soil fertilized with pellets made from composted pig slurry solid fraction and to evaluate the effects of pellet diameter and pellet application method on gaseous emissions. A laboratory scale experiment was carried out investigating two composts: pig slurry solid fraction compost (SSFC) and pig slurry solid fraction mixed with wood chips compost (WCC). The two composts were pelettized in two different diameters—6 and 8 mm—by means of mechanical pelletizer. In total, eight fertilized treatments plus one unfertilized control were included in the experiment. The investigated pellets were applied at the same nitrogen rate (equivalent to 200 kg ha−1) using two different methods (on soil surface and incorporated into the soil). Ammonia (NH3) emission was monitored immediately after pellet application, while nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) were measured on a 57-day incubation period. As expected, ammonia volatilization was not detected from any of the treatments investigated. At the end of the experiment, the cumulative amounts of N2O, CO2 and CH4 ranged from 2.70 mg N-N2O m−2 to 24.30 mg N-N2O m−2, from 601.89 mg C-CO2 m−2 to 1170.34 mg C-CO2 m−2 and from 1.22 mg C-CH4 m−2 to 1.31 mg C-CH4 m−2, respectively. The overall results of the investigation highlighted that application on the soil surface reduced nitrous oxide emission, while the carbon dioxide emission increased significantly with smaller pellet diameter.

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Reuse of Animal Manure: A Case Study on Stakeholders’ Perceptions about Pelletized Compost in Northwestern Italy

Cited by 37 publications

References 54 publications

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Impacts of different organic amendments on soil degradation and phytotoxicity of metribuzin

Recycling Agricultural Wastes and By-products in Organic Farming: Biofertilizer Production, Yield Performance and Carbon Footprint Analysis

Gaseous Emissions after Soil Application of Pellet Made from Composted Pig Slurry Solid Fraction: Effect of Application Method and Pellet Diameter

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