Municipal Compost as a Nutrient Source for Organic Crop Production in New Zealand

Horrocks, A.; Curtin, D.; Tregurtha, Craig; Meenken, Esther D.

doi:10.3390/agronomy6020035

Cited by 32 publications

(23 citation statements)

References 22 publications

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“…Because of compost's slow mineralization, the annual N applications may far exceed plant uptake, raising concerns about potential groundwater pollution if unused N, building up over time, is mineralized and leached when no crop is present. Although the experiment was not designed to assess this issue, long‐term field research suggests that over time, the N mineralization rate from YTCs remains low enough (< 2.5% per year after initial application) that it is unlikely to be a serious risk, especially if cropped year‐round (Horrocks, Curtin, Tregurtha, & Meenken, 2016; Sullivan et al., 2003). A greater proportion of manure‐based compost N becomes plant available, and buildup from annual applications may result in leaching in the absence of winter crops (Evanylo et al., 2008).…”

Section: Resultsmentioning

confidence: 99%

Nitrogen mineralization from organic amendments is variable but predictable

Lazicki

Geisseler

Lloyd³

2020

J of Env Quality

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To manage nitrogen (N) efficiently, organic growers must be able to predict the amount and timing of plant‐available N from organic amendments. In this study, we measured N mineralization from a variety of organic amendments, including composted animal manures and plant material, pelleted and granular organic fertilizer formulations, slaughter waste products, and hydrolyzed liquid fertilizers. In a laboratory incubation, we measured net N mineralization from materials mixed with either organically or conventionally managed soil at 23°C and 60% water holding capacity after 0, 7, 21, 42, and 84 d. We found that net mineral N change in the amended soils after 84 d of incubation fell into four categories: immobilization to 5% of applied N for yard trimmings composts, 15–30% for poultry manure composts, 35–55% for granular fertilizers, and 60–90% for quick release products. However, across all amendments the amount of plant‐available N after 84 d of incubation was well correlated with the carbon (C)/N ratio (R2 = 0.92). Within amendment types, the C/N ratio predicted N mineralization for yard trimmings composts (R2 = 0.91), manure composts (R2 = 0.81), and specialty fertilizer and slaughter products (R2 = 0.88) but not liquid products (R2 = 0.11). Soil management history did not consistently affect net N mineralization but may have influenced timing.

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Section: Resultsmentioning

confidence: 99%

Nitrogen mineralization from organic amendments is variable but predictable

Lazicki

Geisseler

Lloyd³

2020

J of Env Quality

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“…It must be emphasized that the percentage of inorganic N within the total N in most collected domestic "organic fertilizers" was noticeably high. Many studies show that inorganic N comprised less than 10% of compost N [27, 29,30]. The ratio of inorganic N to total N in our collected samples of imported products was approximately 10%.…”

Section: Characteristics Of "Organic Fertilizers"mentioning

confidence: 95%

Title “Organic Fertilizers” in Vietnam’s Markets: Nutrient Composition and Efficacy of Their Application

Quynh

Shima

2018

Sustainability

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Organic fertilizers have recently been gaining popularity; however, their governance is not completely assessed in developing countries. This study investigated the nutrient composition of so-called organic fertilizers in Vietnam's markets and issues related to their production, and evaluated their potential to contaminate the groundwater. We analyzed the physicochemical properties of 12 domestic and four imported products of the fertilizers, and conducted a cultivation experiment in sandy soil with the fertilizer applied at a rate of 200 mg N kg −1 soil using an automatic watering apparatus in a greenhouse. We further studied the production of an "organic fertilizer" from coffee by-products. The nutrient content greatly varied among domestic products, whereas they were quite similar among imported products. The product packaging of the collected samples lacked information regarding raw materials. Two thirds of the domestic products contained over 30% of the total N in the inorganic form, implying that the N content dramatically increased in the fertilizers rather than in their supposed raw materials. The stages involved in the production were composting, the addition of extra soil as a bulking agent, and the mixing-in of chemical substances to increase the nutrient content before packing. The remarkably high ratio of inorganic N to total N was attributed to excessive N leaching from soil by the application of domestic fertilizers. These results suggested the need for quality criteria guidelines for organic fertilizers in Vietnam that underline not only nutrient levels, but also the control of raw materials and production process of compost, because they are closely related to nutrient uptake and the leaching loss of nutrients.

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“…Aerobic composting gives more stable organic product which is used dominantly in agricultural production. Horrocks et al (2016) stated that organically certified compost contains 2 -2.5% N. New techniques of waste management has the potential of nutrient recovery if managed properly. In a study carried out by Mia et al (2018) indicated that placement of municipal organic waste in landfills will result in emissions of gases causing environmental deterioration.…”

Section: Nutrients Recovery Processes (Nrp)mentioning

confidence: 99%

Innovative Processes and Technologies for Nutrients Recovery from Wastes: a Comprehensive Review

Ahmed¹,

Ahmad²,

Hassan³

et al. 2019

Preprint

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Nutrients management is a mainspring in agricultural systems for sustained productivity, economy sustainability and environmental quality. Excessive and lesser nutrient application caused environmental pollution and reduced production, respectively impacting socio-economics of the entire ecosystems. Sustainable agricultural production thus demands supplementation of nutrients either through natural processes, application of animal by-products, and mineral fertilizers to crop fields. Technology application for treating useless agricultural wastes into useful source is a management strategy that prevents environment pollution. Crude animal manures triggered soil degradation, attenuation air and water quality, and resulted in higher concentrations of heavy metals. Primary nutrients, i.e., nitrogen, phosphorus and potassium are used globally and are nonrenewable. Augmented upsurge in prices of inorganic fertilizers and required discharge restrictions on nutrient has stimulated the technological developments including biochar, composting, vermicomposting, composting with biochar, pyrolysis, forward osmosis, and electro-dialysis to recover nutrients. Therefore, outlining the research gaps considering the present and imminent potential of these technologies for adaptation of nutrient recycling is of great importance. Thus, it's need of an hour to fix our environment and for that scientists are trying to introduce and renovate the technologies which have immense potential to mitigate the negative effects of technology adversities on our environment.

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Municipal Compost as a Nutrient Source for Organic Crop Production in New Zealand

Cited by 32 publications

References 22 publications

Nitrogen mineralization from organic amendments is variable but predictable

Nitrogen mineralization from organic amendments is variable but predictable

Title “Organic Fertilizers” in Vietnam’s Markets: Nutrient Composition and Efficacy of Their Application

Innovative Processes and Technologies for Nutrients Recovery from Wastes: a Comprehensive Review

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