Effects of nitrogen rate and application method on early production and fruit quality in highbush blueberry

Ehret, David L.; Forge, T.; Zebarth, Bernie J.; Frey, Brenda; Helmer, Tom; Bryla, David R.

doi:10.4141/cjps-2013-401

Cited by 5 publications

(13 citation statements)

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“…It is unclear if this apparent effect of R. robustus on root biomass will translate to an effect on productivity. Berry yields through 2015 for this experiment have been reported elsewhere (Ehret et al, 2014;Messiga et al, 2018). In parallel with R. robustus and P. crenatus population densities, berry yields increased with fertilization but without clear differences between 1N, 1.5N, and 2N broadcast treatments (Ehret et al, 2014;Messiga et al, 2018).…”

Section: Relationships With Root Biomass and Plant Vigorsupporting

confidence: 53%

“…Each bed was divided into two treatment plots of seven plants each, resulting in 10 plots in each of the six blocks. A total of 10 different fertilizer N treatments were applied to each of the six blocks of 10 plots as described in detail in Ehret et al (2014) and Messiga et al (2018). Only four of those treatments were sampled as part of this study.…”

Section: Experimental Designmentioning

confidence: 99%

“…Most commercial blueberry production also involves the use of sawdust mulch that helps to maintain low soil pH, suppress weeds, and moderate soil temperature and moisture regimes (BCMAL, 2020). Due in-part to the use of such carbon-rich mulches, most conventional blueberry production in the region depends on supplemental application of nitrogen (N) fertilizers to balance N immobilization and maintain productivity (Ehret et al, 2014;Messiga et al, 2018). The effects of N fertilizer application rates on blueberry productivity, fruit quality, and soil N dynamics have been the focus of previous research in the region (Ehret et al, 2014;Messiga et al, 2018).…”

mentioning

confidence: 99%

“…In 2009, a field experiment was established in BC to assess the multi-year effects of a range of N fertilizer application rates and application methods on blueberry productivity, fruit quality, soil chemical properties, and potential for nitrate leaching (Ehret et al, 2014;Messiga et al, 2018). This experiment presented an opportunity to also assess the effects of N fertilization on nematode populations under blueberry.…”

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confidence: 99%

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Influences of nitrogen inputs on nematode populations under highbush blueberry

Forge¹,

Ehret

Messiga

et al. 2020

Journal of Nematology

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This study examined the effects of nitrogen fertilization on populations of Rotylenchus robustus, Pratylenchus crenatus, and Paratrichodorus renifer, and indices of free-living nematode community structure, in relation to highbush blueberry production in British Columbia, Canada. The field experiment was established in fall of 2008 with six replicate plots of each of four experimental N fertilization treatments: 0, 100, 150, and 200% of the annual application rate recommended for conventional blueberry production in the region. Nematode populations were quantified annually from 2009 through 2015, and then nematode populations and root biomass were quantified at seven sample dates from 2016 through 2019. Population densities of R. robustus were consistently greater in the 100% treatment than in the 0, 150, and 200% treatments which did not differ from each other. Population densities of P. crenatus were consistently greater in the 150% treatment than in the 0, 100%, and 200% treatments. The nematode structure index and two indices of diversity declined monotonically with N fertilizer rate, indicating broader changes in the soil food web that could have had indirect, feedback effects on population dynamics of the plant-parasitic nematodes.

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Section: Relationships With Root Biomass and Plant Vigorsupporting

confidence: 53%

Section: Experimental Designmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Influences of nitrogen inputs on nematode populations under highbush blueberry

Forge¹,

Ehret

Messiga

et al. 2020

Journal of Nematology

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“…High precipitation (1508 mm) and well‐drained soils facilitate leaching of NO 3 – into the aquifer, especially in the wet falls that typically follow dry summers. Since the use of poultry manure to amend the low‐C raspberry and blueberry fields is likely a significant cause of NO 3 – contamination (Dean et al, 2000; Ehret et al, 2014; Forge et al, 2016), alternative low‐cost, locally available organic soil amendments are needed to reduce water and soil contamination risks.…”

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confidence: 99%

Animal‐Based Organic Amendments and Their Potential for Excessive Nitrogen Leaching and Phosphorus Loading

Zhang¹,

Hunt²,

Bittman³

2019

Agronomy Journal

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Nitrate contamination of groundwater has been attributed to application of poultry litter to amend soil organic matter on raspberry farms in British Columbia, Canada. A field study assessed the risk of organic amendments that cause nitrate leaching and nutrient accumulation. The amendments, poultry litter, municipal compost, horse manure, and three types of dairy manure solids, were applied at 25 or 50 Mg dry matter ha–1 to match farm rates before new plantings. Plots were either unseeded or seeded with a grass mix to simulate berry establishment with grass alley crop. Soil was sampled at 0‐ to 15‐, 15‐ to 30‐, and 30‐ to 60‐cm depths 15 times over 14 mo and analyzed for concentrations of NH4+ and NO3–, and at 0 to 15 cm for total C, N, and P at 6 mo after application. Three grass harvests were analyzed for yield and N offtake. Poultry litter supplied more than twice the total mineral N and total P compared to the dairy solids and horse manure, while the compost was intermediate. At 25 Mg ha–1, poultry litter increased concentrations of soil (0–15 cm) NH4+ and NO3– (>150 and >300 mg kg–1, respectively), compared with small short‐term increases by compost (∼70 and 100 mg kg–1, respectively). There was almost no increase from dairy and horse amendments. Grass N offtake reduced soil NO3– concentrations but did not eliminate the risk of leaching from poultry litter. We conclude that dairy solids and horse manure present less risk of nitrate leaching and P loading than poultry litter or municipal compost. Core Ideas Poultry manure and compost amendments greatly increased soil NH4+, NO3– and P. Grass ‘alley’ crop did no sufficiently mitigate soil mineral N from poultry manure. Little risk of nitrate leaching or P loading with dairy solids or horse amendments.

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Vegetative and Physiological Responses of “Emerald” Blueberry to Ammoniacal Sources with a Nitrification Inhibitor

Osorio

Cáceres

Covarrubias

2019

J Soil Sci Plant Nutr

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The nitrogen nutrition in blueberry has been studied by some authors; however, the effect of N-nitrate or N-ammoniacal fertilizers with nitrification inhibitors on plant growth and physiology has not been known. The aim of this investigation was to study the effectiveness and physiological implications of ammoniacal fertilizers, with or without nitrification inhibitors in blueberry. An experiment was conducted on 1-year "Emerald" blueberries grown in 20-L plastic pots. Our data indicate that ammoniumcontaining fertilizers promote vegetative growth and increase the leaf nitrogen concentration and gas exchange in plants, possibly due to higher nitrogen root absorption compared with nitrate. On the other hand, fertilization with ammonium with a nitrification inhibitor increases the leaf chlorophyll concentration compared with the addition of ammonium without a nitrification inhibitor and nitrate. However, the ammonium supply decreases the concentration of calcium and potassium in leaves. Our data suggest, for the first time, that fertilization with ammonium accompanied by a nitrification inhibitor is an effective strategy to improve the nitrogen status and promote plant development in "Emerald" blueberry.

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Effects of nitrogen rate and application method on early production and fruit quality in highbush blueberry

Cited by 5 publications

References 0 publications

Influences of nitrogen inputs on nematode populations under highbush blueberry

Influences of nitrogen inputs on nematode populations under highbush blueberry

Animal‐Based Organic Amendments and Their Potential for Excessive Nitrogen Leaching and Phosphorus Loading

Vegetative and Physiological Responses of “Emerald” Blueberry to Ammoniacal Sources with a Nitrification Inhibitor

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