Nitrogen Relations in a Douglas-fir Plantation

Turner, John; Olson, Paul R.

doi:10.1093/oxfordjournals.aob.a085239

Cited by 70 publications

(35 citation statements)

References 6 publications

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“…Similarly Reich et al (1995) found that 43% on average N was retranslocated in tree species in an oligotrophic Amazonian forest. C. indica and S. wallichii showed high leaf nitrogen resorption among the sampled species and were in agreement to the findings of Turner and Olson (1976) that plants with high leaf nutrient retranslocate larger proportion of their nitrogen than do plants with low nutrient status. A lower range of nitrogen retranslocation (28% in C. indica and 11% in S. wallichii) might also be responsible for the 2 nd year's delayed senescence in these species.…”

Section: Relationship Of Wood Moisture (W C ) With Phenologysupporting

confidence: 89%

Role of Wood Water Properties and Leaf Dynamics in Phenology and Response to Drought in Evergreen Himalayan Tree Species

2014

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Five evergreen Himalayan trees namely Castanopsis indica, Schima wallichii, Rhododendron arboreum, Quercus lanata and Q. semecarpifolia were studied for their phenological responses to drought. Wood water properties (wood moisture percentage, wood density and water in wood per volume), starch percentage content, specific leaf mass, nitrogen content in leaves and phenological processes such as leaf emergence, senescence, flowering and fruiting were measured. Measurements were taken 28 times from December 1998 to April 2001 except for the monsoon months. There was significant variation in starch percentage in zero and one year old twigs. Mean starch percentage content ranged from 23% and 17.1% (S. wallichii) to 64% and 61.7% (C. indica) in zero year and one year old twig, respectively. Wood water properties were highest in R. arboreum and lowest in C. indica. SLM showed significant variation with sampled species and mean SLM was highest in R arboreum (1.6 × 10 -2 g cm -2 ) and lowest in S. wallichii (0.64 × 10 -2 g cm -2 ). Mean N ranged from 1.13% (R arboreum) to 1.98% (C. indica). Reserved starch percentage and SLM had a strong effect on phenological activities. They increased during the vegetative bud break and leaf emergence and decreased during senescence. Similarly, leaf nitrogen in the studied species was at the crest of concentration during leaf initiation then declined, one in expanded leaves as the concentration became diluted by increasing cell wall material, and the other at the time of senescence by resorption.

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Section: Relationship Of Wood Moisture (W C ) With Phenologysupporting

confidence: 89%

Role of Wood Water Properties and Leaf Dynamics in Phenology and Response to Drought in Evergreen Himalayan Tree Species

2014

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“…However, for a potentially mobile element such as K, which was at relatively low levels in current needles, the decline with age and with depth in the canopy was comparatively modest. In Douglas fir, P concentrations decreased with age in the present study, whereas they increased for 3 years after fertilising with urea in a 42-yearold plantation in Oregon (Turner & Olson, 1976). Nutrient concentrations in the European larch were similar to values for Larix laricina (Tilton, 1977), which also showed patterns of seasonal concentration decrease for N, P, K, and Zn, and concentration increase for Ca, B, and A1 with age, that were consistent with the trends shown for the pines and Douglas fir over longer periods of needle retention.…”

Section: Discussioncontrasting

confidence: 52%

Management of Structure and Productivity of Boreal and Subalpine Forests

Linder¹,

Kellomäki²

1991

Tree Physiology

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“…VII). Several other authors were also arrived at conflicting conclusions, in both intraspecific [41,45] and interspecific comparisons [14,17,32].…”

Section: Discussionmentioning

confidence: 99%

Foliar N and P resorption and nutrient levels along an elevational gradient in Juniperus oxycedrus L. subsp. macrocarpa (Sibth. & Sm.) Ball

Kutbay

2003

Ann. For. Sci.

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-Juniperus oxycedrus L. subsp. macrocarpa (Sibth. & Sm.) Ball occurs in the Mediterranean region, on the southern part of Turkey and has been widely used in landscape planning and stabilization of coastal dunes. In this study foliar N and P resorption and foliar N, P and K concentrations (on a leaf mass basis) were investigated in J. oxycedrus subsp. macrocarpa. Foliar N, P, and K concentrations and absolute and proportional N and P resorption rates along the topographic position were not changed significantly. Significant correlations were found between absolute and proportional P resorption rates and soil moisture status. However, there were no significant correlation between absolute and proportional N resorption rates and soil moisture status. Foliar N and proportional N resorption were significantly correlated although absolute N resorption was not significantly correlated with foliar N. However, foliar P was significantly correlated both absolute and proportional P resorption. Juniperus oxycedrus

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Nitrogen Relations in a Douglas-fir Plantation

Cited by 70 publications

References 6 publications

Role of Wood Water Properties and Leaf Dynamics in Phenology and Response to Drought in Evergreen Himalayan Tree Species

Role of Wood Water Properties and Leaf Dynamics in Phenology and Response to Drought in Evergreen Himalayan Tree Species

Management of Structure and Productivity of Boreal and Subalpine Forests

Foliar N and P resorption and nutrient levels along an elevational gradient in Juniperus oxycedrus L. subsp. macrocarpa (Sibth. & Sm.) Ball

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