Nitrogen Nutrition of Containerized Cryptomeria japonica ‘Elegans Aurea’

Jull, Laura G.; Warren, Stuart L.; Blazich, Frank A.

doi:10.24266/0738-2898-12.4.212

Cited by 4 publications

(2 citation statements)

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“…4A). This response was consistent with previous reports (2,6,8,17). Nitrate will be continually absorbed by plants as long as it is present in the soil, with excess nitrate being stored when supply exceeds demand for growth (6).…”

Section: Resultssupporting

confidence: 92%

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Nitrogen Nutrition of Containerized Ternstroemia gymnanthera

Conden

Warren

Blazich

2003

Journal of Environmental Horticulture

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Rooted stem cuttings of Japanese ternstroemia (Ternstroemia gymnanthera Thunb.) were grown in 3.8 liter (#1) plastic containers utilizing a substrate of pine bark: sand (8: 1 by vol) amended with micronutrients and dolomitic limestone. Plants were fertilized every other day with a solution consisting of P (K2H2PO4) at a constant rate of 30 mg/liter (ppm), K (K2SO4 and K2H2PO4) at a constant rate of 60 mg/liter (ppm), and a variable rate of N (NH4NO3) at 0, 10, 20, 40, 80, 160, or 320 mg/liter (ppm). Leaf area and shoot (stems and leaves) dry weight increased with increasing N application rate (NAR) until a plateau was reached at 117 mg/liter (ppm). Root: shoot ratio was 0.8 in non-fertilized plants, and decreased to ≈0.1 with N ≥ 104 mg/liter (ppm). Root dry weight and root area increased in response to increasing NARs, reaching a plateau with N at 86 and 70 mg/liter (ppm), respectively. Leaf weight ratio (leaf dry weight ÷ total plant dry weight) increased from 0.2 with N at 0 mg/liter (ppm) to a plateau of ≈0.6 with N ≥ 109 mg/liter (ppm). Stem weight ratio (stem dry weight ÷ total plant dry weight) was 0.4 with N at 0 mg/liter (ppm) then leveled off at ≈0.3 with N ≥ 52 mg/liter (ppm). Root weight ratio (root dry weight ÷ total plant dry weight) decreased steadily from 0.4 with N at 0 mg/liter (ppm) to ≈0.1 with N ≥ 117 mg/liter (ppm). Shoot N, P, K, and S concentrations increased with increasing NARs, reaching plateaus at 117, 23, 124, and 183 mg/liter (ppm), respectively, while Mg was unaffected by NAR. Calcium concentrations increased to 0.75% with a NAR of 40 mg/liter (ppm), and decreased to 0.6 % with N ≥ 107 mg/liter (ppm). Root mineral nutrient concentrations of N, P, K, and S increased with increasing NARs, reaching plateaus of 287, 53, 39, and 195 mg/liter (ppm) respectively, whereas Ca and Mg were not affected by NAR.

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Section: Resultssupporting

confidence: 92%

“…Increasing NARs can suppress uptake of P, K, Ca, Mg, and S (7,8,18,19). In the present investigation, however, shoot P, K, and S concentrations (Fig.…”

Section: Resultsmentioning

confidence: 43%

Nitrogen Nutrition of Containerized Ternstroemia gymnanthera

Conden

Warren

Blazich

2003

Journal of Environmental Horticulture

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Fertilizer Concentration and Moisture Tension Affect Growth and Foliar N, P, and K Contents of Two Woody Ornamentals

Rose¹,

Rose²,

Wang³

1999

HortSci

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Crabapple [Malus ×zumi (Rehd.) `Calocarpa'] and maple (Acer ×freemanii E. Murray `Jeffersred') trees were grown in containers from 22 June to 3 Oct. with three fertilizer concentrations (50, 100, and 200 mg·L-1 N) and two levels of moisture tension in the medium [low setpoint (moist) = 5 kPa and high setpoint (dry) = 18 kPa]. Whole-plant growth was enhanced more by minimizing water stress than by increasing fertilizer concentration. Shoot length and whole-plant dry weight were greater (>29% for crabapple and >90% for maple) in low tension treatments (low water stress) but were unaffected by fertilizer concentration. Moisture tension also had a dominant effect on dry-weight allocation to leaves, stems, and roots. In contrast, foliar nutrient concentrations increased with fertilizer concentration but were affected to a lesser degree by moisture tension. Seasonal patterns in biomass allocation were little affected by treatments; the largest proportions of leaf and root biomass accumulated during summer and fall, respectively.

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Nitrogen Nutrition of Containerized Thuja x ‘Green Giant’

Griffin

Warren

Blazich

et al. 1999

Journal of Environmental Horticulture

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Rooted stem cuttings of ‘Green Giant’ arborvitae (Thuja L. x ‘Green Giant’) were grown in 3.8 liter (#1) plastic containers containing a pine bark: sand (8:1 by vol) substrate. Plants were fertilized three times weekly for 15 weeks with a complete nutrient solution at N application rates (NARs) of 0, 10, 20, 40, 80, 160, or 320 mg/liter (ppm) supplied as ammonium nitrate (NH4NO3). Both shoot and root dry weights were significantly affected by NAR. Maximum shoot weight, as predicted by a quadratic plateau model, was reached at a NAR of approximately 100 mg/liter (ppm), representing a 200% increase over controls [0 mg/liter (ppm) N]. Maximum and minimum root dry weights occurred at 0 mg/liter (ppm) N and approximately 50 mg/liter (ppm) N, respectively, representing a 37% decrease. Root length decreased 36% at a NAR of approximately 50 mg/liter (ppm). Root diameter (root area ÷ root length) increased before reaching a plateau at approximately 130 mg/liter (ppm) N indicating that root length decreased faster than root area at low N concentrations. Shoot concentrations of N, P, Mg, and S were maximized at approximately 71,41,48, and 52 mg/liter (ppm) N, respectively. Uptake of K and Ca were unaffected by N concentrations.

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Nitrogen Nutrition of Containerized Cryptomeria japonica ‘Elegans Aurea’

Cited by 4 publications

References 0 publications

Nitrogen Nutrition of Containerized Ternstroemia gymnanthera

Nitrogen Nutrition of Containerized Ternstroemia gymnanthera

Fertilizer Concentration and Moisture Tension Affect Growth and Foliar N, P, and K Contents of Two Woody Ornamentals

Nitrogen Nutrition of Containerized Thuja x ‘Green Giant’

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