Seasonal growth and foliar nutrients of Larix laricina in three wetland ecosystems

1977 ◽  
Vol 55 (10) ◽  
pp. 1291-1298 ◽  
Author(s):  
Donald L. Tilton
Keyword(s):  
Nutrient Status ◽  
Shoot Elongation ◽  
Nutrient Concentrations ◽  
Larix Laricina ◽  
Wetland Ecosystems ◽  
Site Variation ◽  
Foliar Nutrient ◽  
Ash Weight ◽  
Conifer Swamp ◽  
Study Sites

Levels of N, P, Ca, Mg, K, Al, Fe, Zn, Mn, and B were determined in foliage from tamarack (Larix laricina (DuRoi) K. Koch) in a bog, conifer swamp, and fen from budbreak to leaf abscission. Elongation of needles and lateral shoots as well as dry and ash weight of needles were determined. Expansion of needles and shoots ceased at similar dates for all sites, but trees in the fen had significantly longer needles and lateral shoots.On August 13, foliar concentrations of N, Ca,and Mg were higher in the fen than in the conifer swamp or bog, while concentrations of Al, Fe, Zn, Mn, and B were higher in the bog than the other two sites. Phosphorus concentrations in foliage were similar on this date in the fen and conifer swamp but were lower in the bog site. Despite significant between-site variation for certain foliar elements, two patterns of seasonal variation in nutrient concentrations were discerned. Significant between-site differences in the amounts and rates of needle and shoot elongation, foliar nutrient concentrations at a single sampling time, and patterns of certain foliar elements were associated with variations in nutrient status and moisture–aeration conditions of the study sites.

The influence of mountain alder on the growth, nutrition, and survival of black spruce and Sitka spruce in an afforested heathland near Mobile, Newfoundland

1993 ◽  
Vol 23 (4) ◽  
pp. 743-748 ◽  
Author(s):  
André J. Hudson
Keyword(s):  
Black Spruce ◽  
Nutrient Status ◽  
Sitka Spruce ◽  
Nutrient Concentrations ◽  
Litter Fall ◽  
Humus Layer ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Ecological Basis ◽  
Alder Leaf Litter

The natural invasion of mountain alder (Alnuscrispa (Ait.) Pursh) into monoculture plantations of black spruce (Piceamariana (Mill.) B.S.P.) and Sitka spruce (Piceasitchensis (Bong.) Carr.) afforded an opportunity to assess the effects of mountain alder on soils, and on the growth, nutrient status, and survival of spruce in eastern Newfoundland. The plantations were established on ploughed Kalmia–Vaccinium heath in 1968–1969. Significant increases in the growth of spruce were associated with the presence of high densities of mountain alder in the two plantations studied. The increases began 3–6 years after the invasion and establishment of mountain alder. Estimated nitrogen (N) contributions to each plantation from mountain alder leaf litter fall were approximately 50 kg•ha−1•year−1. Spruce foliage N content was 10–15% higher in high-density mountain alder (HD-alder) plots than in low-density mountain alder (LD-alder) plots, but other foliar nutrient concentrations were low and possibly deficient in the HD-alder plots. Development of a litter fall–humus layer was observed in HD-alder plots but not in LD-alder plots; however, B-horizon soil-N values did not differ significantly between HD-alder and LD-alder plots. The mountain alder invasion did not reduce the densities (stems/ha) of spruce. Additional studies on the autecology of Alnus spp. native to Newfoundland, and on alder-spruce interaction are recommended to further the development of an adequate ecological basis for heathland and peatland afforestation in the region.

A comparison of the foliar nutrient status of elfinwood and symmetrically formed tall trees, Colorado Front Range, U.S.A.

1996 ◽  
Vol 74 (9) ◽  
pp. 1461-1475 ◽  
Author(s):  
Kenneth A. Barrick ◽  
Anna W. Schoettle
Keyword(s):  
Nutrient Status ◽  
Colorado Front Range ◽  
Picea Engelmannii ◽  
Nutrient Concentrations ◽  
Abies Lasiocarpa ◽  
Front Range ◽  
Pinus Flexilis ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Pinus Aristata

We tested the hypothesis of nutrient limitation in the trees of the alpine forest – tundra ecotone by comparing the foliar nutrient status of windsculpted elfinwood (also called krummholz) growing at the upper limit of tree success with symmetrically formed toll trees growing at the nearby timberline. The species investigated included Picea engelmannii (Parry) Engelmann, Abies lasiocarpa (Hooker) Nuttall, pinus flexilis james, and Pinus aristata Bailey. The foliar nutrient concentrations of the ecotone trees were similar to other healthy montane forests. Most of the significant differences in mean foliar nutrient concentrations between elfinwood and tall trees indicate lower concentrations in elfinwood trees. We found significantly lower mean phosphorus concentrations in Picea engelmannii and Abies lasiocarpa elfinwood compared with tall trees, but the mean nitrogen–phosphorus ratios were within the normal range. The foliar nutrient status of Pinus aristata elfinwood was similar to tall trees, while Pinus flexilis had considerably more significant differences in nutrient concentrations between the tree forms. Although there are many theoretical processes that could cause nutrient deficiencies at treeline, this study suggests that the elfinwood along the Colorado Front Range is not currently nutrient deficient. We discuss the potential differences in nutrient ecology between elfinwood and tall trees. Keywords: foliar nutrients, alpine ecotone, treeline, elfinwood, krummholz, conifer.

scholarly journals Foliar Nutrient Characteristics of Four Conifer Species in the Interior Northwest United States

2004 ◽  
Vol 19 (1) ◽  
pp. 13-24 ◽  
Author(s):  
James A. Moore ◽  
Peter G. Mika ◽  
Terry M. Shaw ◽  
Mariann I. Garrison-Johnston
Keyword(s):  
Ponderosa Pine ◽  
Habitat Type ◽  
Nutrient Status ◽  
Forest Tree ◽  
Douglas Fir ◽  
Nutrient Concentrations ◽  
Rock Types ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Forest Tree Nutrition

Abstract This article provides foliar nutrient concentration distributions and sample size calculations for Douglas-fir, grand fir, ponderosa pine, and lodgepole pine. Managers can obtain foliar nutrient values from their own lands and use this information to make judgments on the relative nutrient status of forest stands. Foliage was collected from unfertilized trees at 160 different research sites of the Intermountain Forest Tree Nutrition Cooperative spanning a 16 yr period from 1982 to 1997. Douglas-fir showed the lowest variation in foliar nutrient concentrations, while grand fir was the most variable of the species sampled. Nitrogen was the least variable and Mn and Mo generally the most variable elements for all species. Grand fir had much higher foliar concentrations of K and Ca than the other species. Ponderosa pine had the highest foliar N concentrations. The pines generally have lower nutrient concentrations than the firs, with the exception of Zn. Western hemlock habitat types showed lower Douglas-fir foliar Ca, Mg, and B concentrations, but higher K concentrations than other habitat type series. Douglas-fir growing on soils derived from meta-sedimentary rocks generally had lower foliar nutrient concentrations than those growing on other rock types. West. J. Appl. For. 19(1):13–24.

scholarly journals Effects of Phosphorus on Morphology and Foliar Nutrient Concentrations of Hydroponically Grown Scaevola aemula R. Br. ‘Whirlwind Blue’

HortScience ◽  
2008 ◽  
Vol 43 (3) ◽  
pp. 902-905 ◽  
Author(s):  
Stephanie E. Burnett ◽  
Donglin Zhang ◽  
Lois B. Stack ◽  
Zhongqi He
Keyword(s):  
Shoot Elongation ◽  
Essential Elements ◽  
Nutrient Concentrations ◽  
Flower Number ◽  
Nutrient Analysis ◽  
Leaf Chlorosis ◽  
Foliar Nutrient ◽  
Foliar Concentrations ◽  
Foliar Nutrient Concentrations ◽  
Hydroponically Grown

In commercial greenhouses, fan flower ‘Whirlwind Blue’ (Scaevola aemula R. Br.) plants are sensitive to phosphorus applications in the range typically applied to other floricultural crops. To quantify this response, fan flower plants were grown in Hoagland solutions containing 0, 20, 40, 60, or 80 mg·L−1 P. Plants fertilized with either the highest (80 mg·L−1) or lowest (0 mg·L−1) P concentrations had significantly shorter stems and smaller shoot dry weights and leaf areas than plants fertilized with 20 to 60 mg·L−1 P. Low or high P concentrations negatively impacted flower number; fan flower fertilized with 0, 60, or 80 mg·L−1 P had fewer flowering branches and flowers compared with plants fertilized with 20 to 40 mg·L−1 P. Plants receiving no P had longer roots than those receiving any P and had greater root dry weights than plants receiving all other P concentrations except 20 mg·L−1. Foliar nutrient analysis indicated that although P treatments significantly impacted foliar concentrations of at least some essential macro- and micronutrients, all essential elements were within or near recommended ranges except P. Foliar P concentrations exceeded 1 mg·g−1 in fan flower that received even the lowest concentration of supplemental P, but leaf chlorosis was only observed in plants grown in 60 to 80 mg·L−1 P. As a result of rapid accumulation of P in fan flower foliage and subsequent reductions in flower number and shoot elongation, fan flower should be fertilized with no more than 20 mg·L−1 P.

A comparison of soil fertility and leaf nutrient status of sugar maples (Acer saccharum) in relation to microrelief in two maple forests in Québec

2002 ◽  
Vol 82 (1) ◽  
pp. 23-31 ◽  
Author(s):  
G. Roy ◽  
A. Sauvesty ◽  
F. Pagé ◽  
R. van Hulst ◽  
C. Ansseau
Keyword(s):  
Biological Activity ◽  
Soil Type ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Activity Index ◽  
Nutrient Status ◽  
Physiological Adaptation ◽  
Nutrient Concentrations ◽  
Nutrient Deficiencies ◽  
Foliar Nutrient

This study was conducted to provide a better understanding of the relationship between foliar nutrient status, maple dieback and soil quality. Fieldwork was conducted in four maple stands, two of which were located in the Appalachians at Tingwick and two in the Laurentians at Duchesnay. All stands were characterised by a mound and depression microrelief. In one of the Tingwick maple stands (T1) the predominant soil type was found on mounds, and was well to moderately well-drained (Leeds and Woodbridge series). At the other site (T2), the predominant soil type was in depressions, and imperfectly to poorly drained (Sainte-Marie and Brompton series). At the first Duchesnay site (D1) the predominant soil type was found on mounds and was well to rapidly drained (Ste Agathe series). At the second Duchesnay site (D2), the predominant soil type was also found on mounds, but was well to moderately well-drained (Sergent series). On all sites, the soils were acidic and nutrient poor. The lowest pH values and nutrient concentrations (in the H-Ah horizons) were found in maple stands with well-drained soils (T1 and D1) (P < 0.05). On these sites, maple dieback was less than 10%. It was on the poorly to imperfectly drained soils at Tingwick (T2), as well as on the moderately drained soils at Duchesnay (D2), that we observed the lowest biological activity. Although these soils were the most nutrient rich, we observed foliar nutrient deficiencies, and maple dieback in excess of 25%. Our results suggest that maple dieback is the result of a poor physiological adaptation of sugar maple to poor drainage conditions in the areas studied. Key Words: Dieback, Acer saccharum, forest soils, biological activity index

scholarly journals Critical Nutrient Concentrations and DRIS Norms for Pinus patula

2018 ◽  
Author(s):  
Agustina Sánchez-Parada ◽  
Miguel Ángel López-López ◽  
Armando Gómez-Guerrero ◽  
Marlín Pérez-Suárez
Keyword(s):  
Secondary Growth ◽  
Nutrient Deficiency ◽  
Nutrient Status ◽  
Nutrient Concentrations ◽  
Pinus Patula ◽  
Conifer Species ◽  
Tree Crowns ◽  
Foliar Nutrient ◽  
Limiting Nutrient ◽  
Experimental Trials

Pinus patula is one of the most planted wood conifer species worldwide; however, no foliar nutrient standards exist for this species up to date. The objective of the present study was to generate and verify two sets of foliar nutrient standards for nearly ten-year-old P. patula trees: critical nutrient concentrations and DRIS norms. Nutrients studied were N, P, K, Ca, Mg, Fe, Cu, Zn, Mn, and B. The reference standards were verified experimentally by installing two fertilization trials; one of them located in Huayacocotla, state of Veracruz and the other one in Aquixtla, state of Puebla, Mexico. Nutrient status of each fertilization trial was correctly predicted by critical nutrient values and DRIS as well. Both standards were able to detect the secondary growth-limiting nutrient deficiency in the Huayacocotla trial, where the primary limitation for growth was scarcity of solar radiation within tree crowns. The limiting nutrient in both experimental trials was K.

scholarly journals Comparing Wetland Ecosystems Service Provision under Different Management Approaches: Two Cases Study of Tianfu Wetland and Nansha Wetland in China

2021 ◽  
Vol 13 (16) ◽  
pp. 8710
Author(s):  
Yuchao Zhang ◽  
Steven Loiselle ◽  
Yimo Zhang ◽  
Qian Wang ◽  
Xia Sun ◽  
...  
Keyword(s):  
Water Quality ◽  
Ecosystem Services ◽  
Wetland Management ◽  
Nutrient Retention ◽  
Limited Information ◽  
Urban Centers ◽  
Wetland Ecosystems ◽  
Fundamental Information ◽  
Management Approaches ◽  
Study Sites

The largest blue-green infrastructures in industrialized, urbanized and developed regions in China are often multiuse wetlands, located just outside growing urban centers. These areas have multiple development pressures while providing environmental, economic, and social benefits to the local and regional populations. Given the limited information available about the tradeoffs in ecosystem services with respect to competing wetland uses, wetland managers and provincial decision makers face challenges in regulating the use of these important landscapes. In the present study, measurements made by citizen scientists were used to support a comparative study of water quality and wetland functions in two large multiuse wetlands, comparing areas of natural wetland vegetation, tourism-based wetland management and wetland agriculture. The study sites, the Nansha and Tianfu wetlands, are located in two of the most urbanized areas of China: the lower Yangtze River and Pearl River catchments, respectively. Our results indicated that the capacity of wetlands to mitigate water quality is closely related to the quality of the surrounding waters and hydrological conditions. Agricultural areas in both wetlands provided the lowest sediment and nutrient retention. The results show that the delivery of supporting ecosystem services is strongly influenced by the location and use of the wetland. Furthermore, we show that citizen scientist-acquired data can provide fundamental information on quantifying these ecosystem services, providing needed information to wetland park managers and provincial wetland administrators.

Frost hardiness and winter photosynthesis of Thujapiicata and Pseudotsugamenzlesll seedlings grown at three rates of nitrogen and phosphorus supply

1995 ◽  
Vol 25 (1) ◽  
pp. 18-28 ◽  
Author(s):  
B.J. Hawkins ◽  
M. Davradou ◽  
D. Pier ◽  
R. Shortt
Keyword(s):  
Net Photosynthesis ◽  
Douglas Fir ◽  
Frost Hardiness ◽  
Nutrient Concentrations ◽  
Nitrogen And Phosphorus ◽  
Red Cedar ◽  
Air Temperatures ◽  
Foliar Nutrient ◽  
One Year ◽  
P Supply

One-year-old seedlings of western red cedar (Thujapiicata Donn ex D.Don) and Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) were grown for one season in five nutrient treatments with nitrogen (N) supplied in solution at rates of 20, 100, or 250 mg•L−1 and phosphorus (P) supplied at rates of 4, 20, or 60 mg•L−1. Growth, onset of dormancy, frost hardiness on six dates, and foliar nutrient concentrations in autumn and spring were measured. Midwinter rates of net photosynthesis and transpiration were measured at air temperatures of 4, 7, and 11 °C in seedlings from all nutrient treatments. Recovery of net photosynthesis and transpiration in whole seedlings from the three N treatments was assessed at intervals for 28 days after the seedlings were frozen to −5, −15, and −25°C. Foliar N content differed significantly among nutrient treatments and was positively correlated with supply. Mitotic activity ceased earliest in plants with low N supply. Douglas-fir seedlings in the low-N treatment also ceased height growth earliest. These differences in growth had no significant correlation with frost hardiness. No consistent differences in frost hardiness among nutrient treatments were observed. Higher rates of N and P supply resulted in higher rates of winter net photosynthesis. Net photosynthesis was reduced dramatically by night frost, with greater damage occurring at lower temperatures. Net photosynthesis recovery occurred most quickly in seedlings with the midrate of N and P supply.

Sign in / Sign up

Export Citation Format

Share Document