THE EFFECT OF pH AND FORM OF NITROGEN ON THE GROWTH OF SITKA SPRUCE SEEDLINGS

Leyton, L.

doi:10.1093/oxfordjournals.forestry.a063038

Cited by 15 publications

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“…Cornelis et al () found the uptake of Si by Douglas fir during a hydroponic experiment to be related to growth rate and cumulative transpiration, while Leyton () found that the growth of Sitka spruce seedlings was decreased at low pH values. Thus, the positive relationship between soil pH values and bark Si concentrations found here (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The accumulation of Si in the bark of Sitka spruce seedlings varied significantly between sites and was lowest on acidic, organic rich peat soils. Growth rates of Sitka spruce are significantly lower on these soils ( Farrelly et al, ) possibly because of pH values lower than the optimal range ( Leyton , ). This in turn may indicate that Si uptake is linked to growth rate, although further investigations are necessary to fully describe the relationship.…”

Section: Discussionmentioning

confidence: 99%

“…The increased mobility of metals on these sites due to low pH may be a contributing factor to decreased growth (Hodson and Sangster, 1999), while Si has been shown to ameliorate heavy metal toxicity in plants by co-depositing with heavy metal ions (Liang et al, 2007). Cornelis et al (2010a) found the uptake of Si by Douglas fir during a hydroponic experiment to be related to growth rate and cumulative transpiration, while Leyton (1952) found that the growth of Sitka spruce seedlings was decreased at low pH values. Thus, the positive relationship between soil pH values and bark Si concentrations found here (Fig.…”

Section: Barkmentioning

confidence: 99%

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Silicon concentrations in soil and bark in Irish Sitka spruce forests

Hogan

McDermott

Schmidt

2018

J. Plant Nutr. Soil Sci.

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The relationship between plant‐available silicon (Si) soil concentrations and bark Si concentrations in coniferous species is poorly understood. The objectives of this research were to generate baseline data on Si concentrations in soils and bark of Sitka spruce (Picea sitchensis) seedlings in Ireland and to understand better the relationship between soil and bark Si concentrations. Seedlings were harvested from eight plantation forestry sites and two tree nurseries, and Si concentrations in the bark tissue as well as plant‐available Si concentrations in soils (CaCl2 extractant) were measured. Bark Si concentrations varied significantly between sites and were lowest [mean 790 (± 242 SD) mg kg−1 dry plant tissue] on acidic, organic rich peat soils, while the highest Si concentrations occurred in seedlings [mean 3688 (± 633 SD) mg kg−1 dry plant tissue] grown on soils with low C concentration and higher pH values (≈ 4.5 to 5.5 in H2O). Plant‐available Si soil concentrations were not related to soil C concentrations. There was a negative (but statistically not significant) relationship between plant–soil concentrations and soil pH. A significant negative relationship was observed between plant‐available soil Si concentrations and bark Si concentrations, which may be related to the presence of soil from mixed soil horizons forming the mounds that seedlings were planted on. Uptake and sequestration of Si by seedlings may have been related to the rate of growth of the seedlings, as bark Si concentrations were highest on sites that were expected to have greater seedling growth rates. The negative relationship between bark and plant‐available Si soil concentrations suggest that uptake of Si by Sitka spruce is rejective at higher concentrations.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Barkmentioning

confidence: 99%

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Silicon concentrations in soil and bark in Irish Sitka spruce forests

Hogan

McDermott

Schmidt

2018

J. Plant Nutr. Soil Sci.

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“…For DFIR and WRED, symptoms became particularly obvious after several consecutive days of very hot weather (June [15][16][17][18][19][20][21][22]1982) during the third week of growth. Younger leaves also developed these symptoms just before the whole plant died.…”

Section: And Loss Of Turgor 2) Necrosis Of Older Foliage From Leaf Amentioning

confidence: 99%

Acid tolerance of Pacific Northwest conifers in solution culture

1986

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Seedlings of three Pacific northwest conifer species: Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), western hemlock (Tsuga heterophylla (Raf.) Sarg.), and western redcedar (Thuja plicata Donn) were grown in acid nutrient solutions with and without aluminium present. The acid treatments were paired so as to differentiate the effects of aluminium from the hydrogen ion concentration that a specific level of Al-cations induces via hydrolysis reactions. Relative to agronomic plants, all the conifers were found tolerant of the acid solutions and high levels of aluminium. Species differed in their relative tolerance to H and Al-cations. Douglas-fir and western redcedar both displayed similar or better growth in nutrient containing 175 ppm A1 than in solutions at the same pH (3.0) without aluminium. In contrast to the other species, western hemlock survived and thrived in acid solution of pH 3 while the presence of A1 in acid solution adversely affected seedling root growth and tissue divalent cation concentrations, especially calcium and magnesium. Therefore, the ability of western hemlock to grow in acid conditions is postulated to be related to this species' physiological tolerance of excess H-cations in solution and low tissue requirements of Ca and Mg. This tolerance of H-cation concentrations found for western hemlock meant that the specific effects of high A1 concentrations in solution could be differentiated in hemlock seedling growth and nutrition from those effects caused by increased H-concentration due to Al-hydrolysis.

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“…Althou h this may of chan e in properties with depth has suggested that much information The purpose of this paper is to demonstrate this acuteness of change. For illustrative purposes the pH value has been selected, mainly because it is an important roperty per se (Leyton, 1952;Bradshaw et al, 1960) have demonstrated the value o P a more detailed examination of horizons less specialized soil investigations. Profi P es are fractionated into obsuffice for many soils, in certain Ontario podzolic profiles t a e acuteness can be K ost by conventional sampling.…”

Section: Introductionmentioning

confidence: 99%

The Use of Micropedology in the Study of Some Ontario Podzolic Profiles

Rennie¹

1966

Journal of Soil Science

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By adopting a micropedological approach, in which samples were taken at intervals as small as 5 mm, very acute changes in soil pH with depth were revealed. For certain Ontario podzolic profiles under long-established coniferous forest, pH values changed from around 4 in the topmost humus layer to around 6 at a depth as little as 15 to 20 cm, with little change below this depth. Because much of the magnitude and sharpness of these gradients in properties could be lost by conventional horizon-sampling, the micropedological approach-used so profitably in some branches of soil science-warrants wider adoption, particularly in shallow profiles.

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THE EFFECT OF pH AND FORM OF NITROGEN ON THE GROWTH OF SITKA SPRUCE SEEDLINGS

Cited by 15 publications

References 0 publications

Silicon concentrations in soil and bark in Irish Sitka spruce forests

Silicon concentrations in soil and bark in Irish Sitka spruce forests

Acid tolerance of Pacific Northwest conifers in solution culture

The Use of Micropedology in the Study of Some Ontario Podzolic Profiles

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