Birch Seedling Response to Irrigation Frequency and a Hydrophilic Polymer Amendment in a Container Medium

Tripepi, Robert R.; George, Mary W.; Dumroese, R. Kasten; Wenny, David L.

doi:10.21273/hortsci.26.6.705c

Cited by 7 publications

(7 citation statements)

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“…Throughout the experiment, no effects (P > 0.05) resulting from stress day were found, and there were no interactions between irrigation frequency and stress day. Similar results have been reported for both herbaceous and woody ornamentals (Chu et al, 1995;Jaimez et al, 1999;Tripepi et al, 1991). Tripepi et al (1991) found daily irrigation increased g s among Betula pendula Roth seedlings compared with 3-or 5-d irrigation frequencies.…”

Section: Resultssupporting

confidence: 87%

Irrigation Affects Landscape Establishment of Burford Holly, Pittosporum, and Sweet Viburnum

Scheiber¹,

Gilman²,

Paz³

et al. 2007

HORTS

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Ilex cornuta Lindl. & Paxt. ‘Burfordii Nana’ (dwarf burford holly), Pittosporum tobira [Dryand]. ‘Variegata’ (pittosporum), and Viburnum odorotissimum Ker Gawl. (sweet viburnum) were transplanted into field plots in an open-sided, clear polyethylene-covered shelter to evaluate growth, aesthetic quality, and establishment rates in response to 2-, 4-, or 7-d irrigation frequencies. Establishment was delayed 1 to 2 months for I. cornuta ‘Burrford Nana’ irrigated every 7 d compared with 2- and 4-d frequencies; however, growth and aesthetic quality were similar among treatments. Plants irrigated every 7 d also had higher cumulative water stress levels. Leaf area, shoot dry weight, and total biomass increased among P. tobira ‘Variegata’ and V. odorotissimum irrigated every 2 d. Pittosporum tobira ‘Variegata’ and V. odorotissimum irrigated every 2 d also had greater canopy size and root dry weight, respectively. Neither cumulative water stress nor establishment was affected by irrigation frequency for either species.

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Section: Resultssupporting

confidence: 87%

Irrigation Affects Landscape Establishment of Burford Holly, Pittosporum, and Sweet Viburnum

Scheiber¹,

Gilman²,

Paz³

et al. 2007

HORTS

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“…This resulted in a signifi cant substrates × polymer interaction. Several authors have reported signifi cant decreases in θ a following hydrogel addition (Flannery and Busscher, 1982;Fonteno and Bilderback, 1993;Heiskanen, 1995;Tripepi et al, 1991). Signifi cant increases in θ a after hydrogel addition have not been reported so far, but their aggregative action, due to their absorption properties, might be involved (Rivière et al, 1996).…”

Section: Resultsmentioning

confidence: 99%

Impact of Two Hydrophilic Acrylic-Based Polymers on the Physical Properties of Three Substrates and the Growth of Petunia ×hybrida `Brilliant Pink'

Jobin¹,

Caron²,

Bernier³

et al. 2004

jashs

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Hydrophilic polymers or hydrogels have shown potential to increase water retention of media and to reduce irrigation frequency. This property would be particularly useful in the production of fast growing species in which large amounts of water are needed. This study evaluated the effect of two acrylic-based hydrogels on water desorption curve and hydraulic conductivity of substrates and on plant growth. The duration of their effects was also investigated. Rooted cuttings of Surfinia (Petunia ×hybrida `Brilliant Pink') were transplanted into 30-cm pots containing one of three different substrates amended with one of two types of hydrogels, a commercial acrylic polymer, and a commercial acrylic-acrylamide copolymer, and grown for 9 weeks under well watered conditions and then imposed with a drought. Results indicated that both polymer types gave similar results. The substrates' physical properties (air-filled porosity, available water) at potting time were significantly affected by hydrogel addition, but differences vanished within 9 weeks of growth. Hydrogels had no significant effect on the point at which plant wilted and on the substrate's unsaturated hydraulic conductivity. Shoot dry weight was affected by substrate and hydrogel and was positively correlated to water content between container capacity and -10 kPa of water potential, or between container capacity and the soil water potential at plant turgor loss.

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“…Hydrophilic polymers could disrupt the normal root-distribution pattern, confining growth to the surface layers of soil. Some results indicated a negative effect on shoot growth (Callaghan et al 1988), suggesting that this was due to a poly-mer-induced increase in the export of assimilate from the shoot to the root, while others refer no significant effect or even a decrease in root growth in response to polymer (Tripepi et al 1991). It seems that the negative synergetic effect of Gel 3 Myc may then be due to a higher root demand altering the direction of growth.…”

Section: Ceratonia Siliquamentioning

confidence: 99%

Restoration of a Limestone Quarry: Effect of Soil Amendments on the Establishment of Native Mediterranean Sclerophyllous Shrubs

Clemente

Werner

Máguas

et al. 2004

Restoration Ecology

101

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Limestone quarries are spread over the Mediterranean Basin and have a strong environmental impact on the landscape, causing vegetation losses and soil losses. A reclamation project was conducted in a limestone quarry, situated in Arrábida Natural Park (southwest Portugal), that is dominated by mediterranean vegetation. Revegetation was conducted using three evergreen sclerophyllous shrub species (Ceratonia siliqua, Olea europaea, and Pistacia lentiscus), and new techniques were assayed to improve plant water status and nutrient status during the first phases after plantation. A water-holding polymer (gel), fertilizer, and mycorrhiza inoculum were applied in a factorial experiment in a randomized complete block design. The success of these techniques was evaluated during 1.5 years, through monitoring of growth and ecophysiology of plants. Plant survival was high, the lowest values (95%) being recorded in C. siliqua. There were species-specific responses to the treatments applied. Ceratonia siliqua showed the highest growth rates and was the only species with growth stimulated by fertilizer application. However, the application of fertilizer induced changes in leaf characteristics of the other two species, increasing chlorophyll and nitrogen contents. Mycorrhiza inoculum had no effect on plant response. The addition of the water-holding polymer induced higher midday plant water potentials in C. siliqua, O. europaea, and P. lentiscus, but in the latter two species the simultaneous addition of gel and fertilizer induced the lowest water potentials. The addition of fertilizer and gel is recommended in future revegetation programs but not the combination of both when revegetating with O. europaea and P. lentiscus. The results of this experiment indicate that the use of these mediterranean species, adapted to nutrient and water stress, can circumvent harsh conditions of the quarry.

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Birch Seedling Response to Irrigation Frequency and a Hydrophilic Polymer Amendment in a Container Medium

Cited by 7 publications

References 0 publications

Irrigation Affects Landscape Establishment of Burford Holly, Pittosporum, and Sweet Viburnum

Irrigation Affects Landscape Establishment of Burford Holly, Pittosporum, and Sweet Viburnum

Impact of Two Hydrophilic Acrylic-Based Polymers on the Physical Properties of Three Substrates and the Growth of Petunia ×hybrida `Brilliant Pink'

Restoration of a Limestone Quarry: Effect of Soil Amendments on the Establishment of Native Mediterranean Sclerophyllous Shrubs

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