Influence of Plant Age on Nutrient Absorption for Marigold Seedlings

Tolman, Deborah A.; Niemiera, Alexander Xavier; Wright, Robert D.

doi:10.21273/hortsci.25.12.1612

Cited by 15 publications

(9 citation statements)

References 8 publications

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“…The nearly non-detectable PWP concentrations for the 0.1 g P treatment on all sampling dates after 16 DAI were most likely due to root uptake of P. In other studies, reduction in PWP concentrations during the equilibration period between irrigation and pour-through extraction was attributed to root uptake when observed for Hydrangea paniculata Sieb. 'Limelight', Ilex crenata 'Helleri', Rhododendron L. 'Karen' (Shreckhise et al, 2018), Tagetes erecta L. 'Inca Gold' (Tolman et al, 1990) and Euphorbia pulcherrima Willd. Ex Klotzch 'Freedom Red' (Cavins et al, 2004).…”

Section: Middle Atlantic Coastal Plainmentioning

confidence: 99%

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Shreckhise

Owen

Niemiera

2019

Scientia Horticulturae

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In containerized nursery-crop production, conventional phosphorus (P) fertilization amounts are reported to be in excess of plant needs which has resulted in poor P use efficiency (PUE) and subsequent P leaching from containers. Phosphorus leaching can be reduced and PUE improved without affecting plant growth by reducing P fertilization. The objective of this study was to identify the lowest controlled-release fertilizer (CRF)-P content and subsequent pour-through-extracted substrate pore-water P (PWP) concentration that produces maximal shoot growth of two common container-grown nursery crop species, Hydrangea macrophylla 'PIIHM-II' (hydrangea) and Ilex crenata 'Helleri' (holly), in a pine bark substrate. Hydrangea and holly liners were potted into 3.8-L containers containing a pine bark substrate and grown simultaneously in two different Virginia ecoregions, Middle Atlantic Coastal Plain (MACP) and Ridge and Valley (RV). Plants were fertilized with one of five CRF formulations, each containing equal nitrogen (N) and potassium (K) and 0.4%, 0.9%, 1.3%, 1.7% or 2.6% (control) P to supply containers with 0.1, 0.2, 0.3, 0.4 or 0.6 g P, respectively. In both ecoregions, hydrangea shoot dry weight (SDW) and growth index [i.e., (widest width + perpendicular width + height) ÷ 3, GI] values were maximal in plants fertilized with 0.3 to 0.4 g P or the control. The lowest CRF-P rate needed for maximal SDW and GI of holly was 0.2 g P at the RV site and 0.4 g P at the MACP site. Mean PWP concentrations that corresponded with highest SDW were as low as 0.8 and 1.2 mg L −1 for hydrangea and holly, respectively. Results from this research suggest hydrangea requires approximately half the P rate supplied by recommended rates of conventional CRFs. Since the growth response of holly to CRF-P rate at the MACP site was inconsistent with results observed at the RV site and findings in scientific literature, further research is needed to determine the minimum required CRF-P rate for this taxon.

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Section: Middle Atlantic Coastal Plainmentioning

confidence: 99%

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Shreckhise

Owen

Niemiera

2019

Scientia Horticulturae

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“…Little attention has been given to identifying nutrient requirements and nutritional status of container-grown plants as related to plant age or stage of development (Tolman et al, 1990). For instance, Bryson and Mills (2014) reported an estimated age and where the leaf tissue was sampled by stating ''mature leaves from new growth,'' while Campbell (2000) only reported leaf tissue standards for poinsettia (Euphorbia pulcherrima Willd.…”

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confidence: 99%

Hibiscus Leaf Tissue Nutrient Sufficiency Ranges by Chronological Age

Owen¹

2019

horts

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Perennial hibiscus (Hibiscus sp.) are popular summer-flowering plants that are grown in greenhouses or nurseries, where growers must optimize production inputs such as fertility to maximize plant growth and produce high-quality flowering crops. The objective of this study was to determine the optimum fertilizer concentrations, identify leaf tissue nutrient sufficiency ranges by chronological age, and to expand leaf tissue nutrient standards of Hibiscus hybrid L. (hibiscus) grown in soilless substrates during container production. Two cultivars of hibiscus (H. hybrid L. 'Mocha Moon' and 'Starry Starry Night') were grown under one of six constant liquid fertilizer concentrations [50, 75, 100, 200, 300, or 400 mg · L L1 nitrogen (N)] with a constant level of water-soluble micronutrient blend in a greenhouse. The fertilizer concentrations sufficient for optimal plant growth and development were determined by analyzing plant height, diameter, growth index (GI), primary shoot caliper (PSC), and total dry mass, and they were found to be 100-300 mg · L L1 N after an 8-week crop cycle. Recently, mature leaf tissue samples were collected and analyzed for elemental content of 12 nutrients at 2, 4, 6, and 8 weeks after transplant (WAT) from plants fertilized with 100-300 mg · L L1 N. An overall trend of increasing sufficient tissue concentration over time was observed for total N, phosphorus (P), calcium (Ca), sulfur (S), zinc (Zn), copper (Cu), and boron (B), whereas a decreasing trend was observed for potassium (K), iron (Fe), manganese (Mn), and aluminum (Al). For instance, at 2 WAT, total N ranged from 3.1% to 5.1% N and increased to a range of 4.2% to 4.7% N at 8 WAT. At 2 WAT, Fe and Mn ranged from 79.2 to 103.6 mg · L L1 Fe and 66.3-82.8 mg · L L1 Mn and decreased to ranges of 75.6-82.9 mg · L L1 Fe and 18.1-99.7 mg · L L1 Mn at 8 WAT, respectively. Optimal leaf tissue concentration sufficiency ranges determined in this scientifically-based study were narrower than previously reported survey values for the genera Hibiscus.

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“…However, because unamended soilless substrates (e.g., bark, peatmoss, sand) contain relatively small amounts of N and contribute little toward plant health and vigor (Whitcomb, 1986;Bunt, 1988), TNG is often accepted as a measure of fertilizer N uptake. Consequently, many studies have used the total N method to calculate fertilizer N uptake and fertilizer N uptake efficiency in container-grown crops (Ivy et al, 2002;Rose and Biernacka, 1999;Rose et al, 1994;Tolman et al, 1990;Tyler et al, 1996).…”

mentioning

confidence: 99%

Isotopic and Nonisotopic Estimation of Nitrogen Uptake Efficiency in Container-grown Woody Ornamentals

Sandrock¹,

Righetti²,

Azarenko³

2005

HortSci

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Cornus sericea L., Weigela florida (Bunge) A. DC., and Euonymus alatus (Thunb.) Sieb were grown outside in 3.8-L plastic containers for 345 days (1 Apr. 2001 to 11 Mar. 2002). Nitrogen (N) was applied at rates (NAR) of 25, 50, 100, 200, and 300 mg·L–1 and delivered as aqueous double-labeled 15N depleted NH4NO3 (min 99.95% atom 14N). In all species, root, shoot, and total plant dry weight increased with increasing NARs while root to shoot ratios decreased. Similarly, root, shoot, and total plant N increased with NAR for each species, and at each NAR more N was stored in the roots than in the shoots. Estimation of fertilizer N uptake determined by the total N method was higher for all species and at each NAR than estimation of N uptake determined by the fertilizer 15N tracer method. Fertilizer N uptake efficiency determined by the total N method was highest at 25 mg·L–1 and decreased as NARs increased. In contrast fertilizer N uptake efficiency determined by the fertilizer 15N tracer method was lowest at 25 mg·L–1 and increased or remained relatively constant as NARs increased. Differences in N uptake and N uptake efficiency can be attributed to overestimation by the total N method due to the inclusion of nonfertilizer N and underestimation by the fertilizer 15N tracer method due to pool substitution. Corrected N uptake efficiency values can be calculated by adjusting the original data (total N or 15N uptake) by the distance between the origin and the y intercept of the regression line representing the data.

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Influence of Plant Age on Nutrient Absorption for Marigold Seedlings

Cited by 15 publications

References 8 publications

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Hibiscus Leaf Tissue Nutrient Sufficiency Ranges by Chronological Age

Isotopic and Nonisotopic Estimation of Nitrogen Uptake Efficiency in Container-grown Woody Ornamentals

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