Estimating nitrogen and phosphorus losses from lowland paddy rice fields during cropping seasons and its application for life cycle assessment

Leon, Ai; Kohyama, Kazunori

doi:10.1016/j.jclepro.2017.06.116

Cited by 32 publications

(10 citation statements)

References 30 publications

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“…Notably, the lower loss potential of P coll in macroaggregates of paddy soils does not imply that it is less likely to be lost to water bodies. However, this could indicate that P coll has been lost into water and discharged into the water body through the channels during rice seasons, particularly when under long-term flooding [72]. Moreover, flooding resulted in an anaerobic state in soil aggregates, and Fe bound to colloids and aggregates was reduced, resulting in excessive release and loss of P coll [15].…”

Section: Loss Potential Of Colloidal P In Aggregatesmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Environ Sci Eur

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Background: Colloid-facilitated phosphorus (P) transport is recognized as an important pathway for the loss of soil P in agricultural systems; however, information regarding soil aggregate-associated colloidal P (P coll ) is lacking. To elucidate the effects of aggregate size on the potential loss of P coll in agricultural systems, soils (0-20 cm depth) from six land-use types were sampled in the Zhejiang Province in the Yangtze River Delta region, China. The aggregate size fractions (2-8 mm, 0.26-2 mm, 0.053-0.26 mm and < 0.053 mm) were separated using the wet sieving method. Colloidal P and other soil parameters in aggregates were analyzed. Results:Our study demonstrated that 0.26-2 mm small macroaggregates had the highest total P (TP) content. In acidic soils, the highest P coll content was observed in the 0.26-to 2-mm-sized aggregates, while the lowest was reported in the < 0.053 mm (silt + clay)-sized particles, the opposite of that revealed in alkaline and neutral soils. Paddy soils contained less P coll than other land-use types. The proportion of P coll in total dissolved P (TDP) was dominated by < 0.053 mm (silt + clay)-sized particles. Aggregate size strongly influenced the loss potential of P coll in paddy soils, where P coll contributed up to 83% TDP in the silt + clay-sized particles. The P coll content was positively correlated with TP, Al, Fe, and the mean weight diameter. Aggregate-associated total carbon (TC), total nitrogen (TN), C/P, and C/N had significant negative effects on the contribution of P coll to potential soil P loss. The P coll content of the aggregates was controlled by the aggregate-associated TP and Al content, as well as the soil pH value. The potential loss of P coll from aggregates was controlled by its organic matter content. Conclusion:We concluded that management practices that increase soil aggregate stability or its organic carbon content will limit P coll loss in agricultural systems.

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Section: Loss Potential Of Colloidal P In Aggregatesmentioning

confidence: 99%

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Jin

et al. 2020

Environ Sci Eur

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“…Numerous environmental impact assessment studies of rice production using LCA have been conducted. Many of these studies assessed only global warming (e.g., [11,12]) or a small number of environmental impact categories such as global warming and eutrophication (e.g., [13,14]), although several studies aggregated multiple environmental impacts using a weighting approach [15][16][17][18][19]. However, as noted above, these weighting assessments were subjective and reflected value choices [5].…”

Section: Literature Reviewmentioning

confidence: 99%

Eco-Efficiency Assessment of Intensive Rice Production in Japan: Joint Application of Life Cycle Assessment and Data Envelopment Analysis

Masuda

2019

Sustainability

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To promote sustainable agriculture worldwide, it is important to understand what constitutes eco-efficiency for rice, a staple food in many countries. This study examined whether expanding the scale of rice farming contributed to the improved eco-efficiency of intensive rice production in Japan. Both life cycle assessment (LCA) and data envelopment analysis (DEA) were used to measure comprehensively the eco-efficiency of rice production. A DEA window analysis technique with two DEA inputs (global warming and eutrophication from the LCA results) and one DEA output (weight-based rice yield) was applied to the statistical data for 2005–2011 categorized by the size of rice farms. The results indicate that expanding the size of rice farms is an effective way of improving the eco-efficiency of intensive rice production in Japan. The important factors for improving eco-efficiency are the implementation of economies of scale, reduced outsourcing of farm work, and savings in chemical fertilizers and pesticides. Expansion of the size of rice farms through the recent abolition of the rice production adjustment program will also contribute to improving the eco-efficiency of Japanese rice production.

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“…agricultural fertilizers, feed and food additives, laundry detergents and other industrial applications (Belboom et al, 2015;Mottet et al, 2017;Noya et al, 2017;Van Hoof et al, 2017). The final step corresponds to the dissipation and the recycling of phosphorus (Chen & Graedel, 2016;Fowdar et al, 2017;Harris et al, 2017;Hobbs et al, 2017;Leon & Kohyama, 2017;Maguire & Fulweiler, 2017;Ortiz-Reyes & Anex, 2018). In recycling, other materials such as nitrite associated with phosphorus can be recovered in parallel.…”

Section: Materials Flow Of Phosphorus Modelmentioning

confidence: 99%

Environmental sustainability of phosphorus recycling from wastewater, manure and solid wastes

Golroudbary

Wali

Krasławski

2019

Science of The Total Environment

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Phosphorus (P) is an important critical material essential for crops cultivation and animal husbandry. Effective phosphorous recycling is considered one of the most significant factors in alleviating its criticality. However, despite the importance of phosphorous recycling, its sustainability is not studied extensively. This paper aims to answer the question if recycling of phosphorus is an environmentally sustainable option. To address this problem, two issues are analyzed in this paper: energy consumption and greenhouse gas (GHG) emissions in phosphorous recycling. The analysis was performed by simulating mass and energy flows in the global phosphorus supply chain (from mining to recycling) in order to understand and analyze its environmental impact in 2000-2050. The results of simulation show that around 82% of recycled phosphorous originates from manure. Moreover, the calculations indicate that about 70% of total GHG emissions from phosphorous recycling is caused by wastewater processing. In addition, the results show that phosphorous obtained from recycled wastewater constitutes only 2% of the whole amount recovered in the recycling process. Therefore, the obtained results show a clear need for a detailed analysis of the sustainability of phosphorous recycling processes. Moreover, the analysis of scenarios of phosphorus consumption indicates that GHG emissions increase slowly in the mining phase and grow exponentially in the recycling stage.The main finding of this paper contradicts the general opinion about environmental friendliness of recycling. It shows that phosphorus recycling is not a sustainable solution in a longer perspective.

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Estimating nitrogen and phosphorus losses from lowland paddy rice fields during cropping seasons and its application for life cycle assessment

Cited by 32 publications

References 30 publications

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Enhanced soil aggregate stability limits colloidal phosphorus loss potentials in agricultural systems

Eco-Efficiency Assessment of Intensive Rice Production in Japan: Joint Application of Life Cycle Assessment and Data Envelopment Analysis

Environmental sustainability of phosphorus recycling from wastewater, manure and solid wastes

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