Do oaks have different strategies for uptake of N, K and P depending on soil depth?

Göransson, Hans; Fransson, Ann-Mari; Jönsson-Belyazid, Ulrika

doi:10.1007/s11104-007-9325-2

Cited by 32 publications

(33 citation statements)

References 28 publications

(28 reference statements)

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“…5), indicating that the nitrogen concentration of our samples is higher in the surface layer without a difference in fine root diameter. This is similar to trends described in Pregitzer et al (1998), Genenger et al (2003 and Göransson et al (2007). Additionally, the vertical pattern corresponds to those of soil EC and soil nitrogen concentration, but not soil pH ( Fig.…”

Section: Discussionsupporting

confidence: 86%

“…1 Typical stand structure of fir-wave regeneration in the subalpine zone. A regular wave of cohorts is formed with sequential tree mortality and regeneration concentration of fine root tissue is higher in upper soil layers than in lower layers (Pregitzer et al 1998;Genenger et al 2003;Göransson et al 2007). Therefore, we can examine the acquisition strategy of a subalpine Abies community with shallow soil by comparing fine root characteristics with those of other forest types.…”

Section: Introductionmentioning

confidence: 99%

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Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

et al. 2010

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To clarify the nutrient acquisition strategies for below-ground resources in a subalpine Abies forest with shallow soils, we examined the vertical patterns of fine root biomass, morphology, nitrogen concentration of fine root tissue and soil chemical characteristics in nine quadrats of sapling, young and mature stands in a subalpine fir-wave forest, central Japan. The community characteristics changed with stand development, but stand development did not influence the vertical pattern of fine root characteristics. Fine root biomass decreased with soil depth. Specific root length did not differ among soil depths, and neither average diameter nor tissue density of fine roots changed vertically. The nitrogen concentration of fine roots differed significantly among soil depths, and was higher in surface soils than in deeper soils. Moreover, soil pH, soil electrical conductivity and soil nitrogen concentration were higher in surface layers than deeper layers. Therefore, we suggest that the subalpine Abies community has a nutrient acquisition strategy that allows uptake of more nutrients near the surface in shallow soils due to the larger investment in biomass and more active metabolism, but not due to phenotypic plasticity in fine root morphology. In addition, we observed that fine root biomass changed with stand development, where specific root length was greater in sapling stands than in older stands.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

et al. 2010

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“…The N concentration in the roots decreased with increasing soil depth but no clear correlation was found between the uptake rate of NH 4 + -N or NO 3 --N, and the root nitrogen concentration, as also seen in the study of Göransson et al (2007).…”

Section: Root N Concentration and N Uptakementioning

confidence: 57%

“…High 15 N uptake demonstrates nitrogen limitation (Jones et al 1991;Rosengren et al 2003). The results obtained with excised roots represent a relative measurement of the root net uptake capacity at different soil depths and not the actual uptake rate, as would have been found with the roots still attached to the plant (Göransson et al 2007). …”

Section: Nitrogen Uptakementioning

confidence: 94%

Root growth and N dynamics in response to multi-year experimental warming, summer drought and elevated CO2 in a mixed heathland-grass ecosystem

Arndal

Schmidt

Beier

et al. 2014

Functional Plant Biol.

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Abstract. Ecosystems exposed to elevated CO 2 are often found to sequester more atmospheric carbon due to increased plant growth. We exposed a Danish heath ecosystem to elevated CO 2 , elevated temperature and extended summer drought alone and in all combinations in order to study whether the expected increased growth would be matched by an increase in root nutrient uptake of NH 4 + -N and NO 3 --N. Root growth was significantly increased by elevated CO 2 . The roots, however, did not fully compensate for the higher growth with a similar increase in nitrogen uptake per unit of root mass. Hence the nitrogen concentration in roots was decreased in elevated CO 2 , whereas the biomass N pool was unchanged or even increased. The higher net root production in elevated CO 2 might be a strategy for the plants to cope with increased nutrient demand leading to a long-term increase in N uptake on a whole-plant basis. Drought reduced grass root biomass and N uptake, especially when combined with warming, but CO 2 was the most pronounced main factor effect. Several significant interactions of the treatments were found, which indicates that the responses were nonadditive and that changes to multiple environmental changes cannot be predicted from single-factor responses alone.

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“…Extensive culling of seedlings each time they are transplanted (stepped up) into increasingly larger containers includes selecting seedlings for size as well as the abundance of lateral roots near the root collar. Bumgarner et al (2008) and Goransson et al (2007) showed that the production of feeder roots near the root collar improved seedling establishment and early growth in the field because these roots are better distributed where soil nutrients are concentrated.…”

Section: Discussionmentioning

confidence: 99%

Field Performance of <i>Quercus bicolor</i> Established as Repeatedly Air-Root-Pruned Container and Bareroot Planting Stock

Sambeek¹,

Godsey²,

Walter³

et al. 2016

OJF

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Benefits of repeated air-root-pruning of seedlings when stepping up to progressively larger containers include excellent lateral root distribution immediately below the root collar and an exceptionally fibrous root ball. To evaluate long-term field performance of repeatedly air-root-pruned container stock, three plantings of swamp white oak (Quercus bicolor Willd.) 10 to 13 years old were located that also included bareroot planting stock. Initial and final stem diameter and height and above-ground green weights were determined on randomly selected trees at each site. On a site with a sandy, excessively drained, high pH soil, trees (age 10) from container stock were 1.5 times taller, 2.3 times larger in dbh, and 2.8 times greater in green weight than trees from bareroot stock which averaged only 2.9 m tall, 3.9 cm dbh, and 16.3 kg green weight. On a site with high clay, poor internal drainage, and frequent flooding, trees (age 12) from container stock were 1.4 times taller, 1.8 times larger in dbh, and 4.1 times greater in green weight than trees from bareroot stock which averaged 4 m tall, 7.3 cm dbh, and 28 kg green weight. On an upland site with deep loess soils, there was a trend for trees (age 13) from container stock to be only slightly larger than trees from bareroot stock with each stock type averaging 9.6 m tall, 20 cm dbh, and 177 kg green weight. Repeated air-root pruning produced lateral roots immediately below the root collar * Corresponding author.J. W. Van Sambeek et al. 164 that resulted in large container stock with large well-balanced root systems that were competitive on harsh or less than ideal oak sites. Although the process is relatively labor intensive, propagation of repeatedly air-root-pruned container stock is readily adaptable internationally to locally available sources of organic matter and open-bottom containers.

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Do oaks have different strategies for uptake of N, K and P depending on soil depth?

Cited by 32 publications

References 28 publications

Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

Root growth and N dynamics in response to multi-year experimental warming, summer drought and elevated CO2 in a mixed heathland-grass ecosystem

Field Performance of <i>Quercus bicolor</i> Established as Repeatedly Air-Root-Pruned Container and Bareroot Planting Stock

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Do oaks have different strategies for uptake of N, K and P depending on soil depth?

Cited by 32 publications

References 28 publications

Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

Vertical patterns of fine root biomass, morphology and nitrogen concentration in a subalpine fir-wave forest

Root growth and N dynamics in response to multi-year experimental warming, summer drought and elevated CO2 in a mixed heathland-grass ecosystem

Field Performance of &lt;i&gt;Quercus bicolor&lt;/i&gt; Established as Repeatedly Air-Root-Pruned Container and Bareroot Planting Stock

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Field Performance of <i>Quercus bicolor</i> Established as Repeatedly Air-Root-Pruned Container and Bareroot Planting Stock