Consequences of Ontario P index recommendations for reduced manure and fertilizer phosphorus applications on corn yields and soil phosphorus

Ribey, Margaret Anne; O’Halloran, I. P.

doi:10.1139/cjss-2015-0072

Cited by 6 publications

(6 citation statements)

References 33 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Maintaining the same stocking rate throughout, winter spring wool growth decreased by 28%. In contrast to pasture, other studies have found little or no decrease in maize (Zea mays L.) production as STP concentrations and WEP trend toward their respective targets (Zhang et al, 2004;Ribey and O'Halloran, 2016). This is presumably due to the ability of maize to explore a much greater depth and volume of soil than pasture and therefore access greater P reserves.…”

Section: Meeting Environmental Targetsmentioning

confidence: 93%

The Ability to Reduce Soil Legacy Phosphorus at a Country Scale

McDowell

Dodd

Pletnyakov

et al. 2020

Front. Environ. Sci.

View full text Add to dashboard Cite

The build-up of soil phosphorus (P) beyond plant requirements can lead to a longterm legacy of P losses that could impair surface water quality. Using a database of ∼4,50,000 samples collected from 2001-2015 we report the level of soil P enrichment by soil type, land use and region and the time it would take for Olsen P to decline to agronomic targets (20-0 mg L −1 ) if P fertilizer was stopped. We also modeled the time it would take for water extractable P (WEP), an indicator of P losses in surface runoff, to decline to an environmental target (0.02 mg L −1 ). Some 63% of the samples were enriched beyond agronomic targets. The area-weighted median time to reach the agronomic target was predicted to occur within a year for 75% of samples but varied up to 11.8 years in some land uses. However, the area-weighted time to reach an environmental target was 26-55 years for the 50th and 75th percentile of areas. This indicates that while an agronomic target can be easily met, additional strategies other than stopping P fertilizer inputs are required to meet an environmental target.

show abstract

Section: Meeting Environmental Targetsmentioning

confidence: 93%

The Ability to Reduce Soil Legacy Phosphorus at a Country Scale

McDowell

Dodd

Pletnyakov

et al. 2020

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Soil samples were air dried, sieved (2 mm), and extracted using the Olsen P procedure. Phosphorus concentration was analyzed using the molybdate blue method with a Lachat QuickChem FIA+ Auto-Analyzer (8000 Series, Lachat Instruments, Loveland, CO, USA) [51][52][53].…”

Section: Yield Determination and Soil And Plant Sampling For P Analysesmentioning

confidence: 99%

Crop Production and Phosphorus Legacy with Long-Term Phosphorus- and Nitrogen-Based Swine Manure Applications under Corn-Soybean Rotation

Zhang

Wang

et al. 2021

Agronomy

View full text Add to dashboard Cite

The traditional manure management strategy, based on crop N needs, results in accumulation of phosphorus (P) in soil due to the imbalance of N/P ratio between crop requirement and manure supply. This study was conducted from 2004 to 2013 to evaluate the effects of P-based liquid and solid swine manure (LMP and SMP, for P-based liquid and solid swine manure, respectively) application, in comparison with N-based application (LMN and SMN, for N-based liquid and solid swine manure, respectively), on crop yield and soil residual P under corn (Zea mays L.)–soybean (Glycine max L.) rotation in a Brookston clay loam soil of the Lake Erie basin, ON, Canada. Chemical fertilizer P (CFP) and non-P treatments were included as controls (CK). For liquid manure treatments, corn yield for LMN showed a lower annual corn yield (7.82 Mg ha−1) than LMP (9.36 Mg ha−1), and their differences were even statistically significant at p < 0.05 in some cropping years. The annual corn yield of LMP was also higher than those of SMP (7.45 Mg ha−1) and SMN (7.41 Mg ha−1), even the CFP (8.61 Mg ha−1), although the corresponding yield differences were not significant (p < 0.05) in some cropping years. For soybean, the plots with P application produced an average of 0.98 Mg ha−1 greater annual yields than CK. No significant differences were found between CFP and manure treatments. The annual corn yield of SMN was close to that of the CK (7.19 Mg ha−1). The grain P removal (GPR) of SMN (18.6 kg ha−1) for soybean was significantly higher than that of the other treatments. The above-ground-P uptake (AGPU) in SMN, for both corn and soybean, was significantly higher than that of the other five treatments. The soil test P (STP) presented clear stratification, concentrating in the top 30 cm soil depth after 10 years of application. The contents of STP with LMN and SMN increased from 7.1 mg P kg−1 to 12.4 and 45.5 mg P kg−1, respectively. The sum of STP mass (0–30 cm) with LMP (31.6 kg ha−1) was largely identical to that with CFP (30.1 kg ha−1); however, with SMN (173.7 kg ha−1), it was significantly higher than the rest of the treatments. Manure P source availability coefficients were averaged at 1.06 and 1.07 for LMP and SMP, respectively. The addition of phosphorus-based liquid or solid swine manure can overcome the drawback of traditional N-based applications by potentially reducing the adverse impact on water quality while sustaining crop agronomic production.

show abstract

“…The direct implication is that soil P saturation was not evaluated, which is an important factor to consider when evaluating the impact of the subsidy. While monitoring soil P saturation is relevant for environmental safety (Ketterings and Czymmek, 2012;Ribey and O'Halloran, 2016;Williams et al, 2015), continuous monitoring campaigns for this variable in Chile are absent.…”

Section: Effectivity Of a P Fertilization Subsidy: The Case Studymentioning

confidence: 99%

Usefulness of an opportunistic data analysis approach to evaluate if environmental regulations aim at relevant applications

et al. 2019

View full text Add to dashboard Cite

Environmental regulations aim to protect the environment from anthropogenic detrimental effects.To ensure their effectivity and to avoid unexpected results and budget losses, environmental regulations need careful designs grounded in observational data. Comprehensive monitoring campaigns are not always achievable in developing economies, since environmental monitoring is not always prioritized due to resource constraints. We propose to tackle the problem using an opportunistic data analysis approach as supplementary information for environmental monitoring.We applied this approach to evaluate the application of Chilean phosphorus (P) fertilization subsidy. A risk assessment for P surplus was performed using three datasets: (1) secondary data acquired from thousands of unclassified laboratory records from the private sector (n = 7,957); (2) a dataset of soil available P from a budged-restricted monitoring campaign, and; (3) a conjoint dataset that comprises 1 and 2. Results indicate that while laboratory records represented the general characteristics of the study area, field monitoring data evidenced a surplus of soil P. Using the laboratory records to enrich the data acquired by field monitoring modified the reality reflected by the monitoring data alone. The use of the conjoint dataset leads to the conclusion that soils in the study area had enough available P for optimum production, and that farmers were already using external sources of P fertilizers within the current market structure. Our study constitutes an example of the use of private data to contribute to public soil monitoring programs and environmental regulation designs. The case study serves as a successful example of opportunistic data usage in environmental monitoring, as a low-cost alternative to complement field observations.

show abstract

Consequences of Ontario P index recommendations for reduced manure and fertilizer phosphorus applications on corn yields and soil phosphorus

Cited by 6 publications

References 33 publications

The Ability to Reduce Soil Legacy Phosphorus at a Country Scale

The Ability to Reduce Soil Legacy Phosphorus at a Country Scale

Crop Production and Phosphorus Legacy with Long-Term Phosphorus- and Nitrogen-Based Swine Manure Applications under Corn-Soybean Rotation

Usefulness of an opportunistic data analysis approach to evaluate if environmental regulations aim at relevant applications

Contact Info

Product

Resources

About