Growth and foliar nutrient concentrations of Pacific silver fir

1989 ◽  
Vol 19 (11) ◽  
pp. 1429-1435 ◽  
Author(s):  
M. A. Radwan ◽  
M. D. Murray ◽  
J. M. Kraft
Keyword(s):  
Site Index ◽  
Site Quality ◽  
Nutrient Concentrations ◽  
Future Research ◽  
Silver Fir ◽  
Base Line ◽  
Foliar Nutrient ◽  
Foliar Concentrations ◽  
Foliar Nutrient Concentrations ◽  
Natural Stands

Nineteen natural stands of Pacific silver fir (Abiesamabilis (Dougl.) Forbes) were assessed for selected site and tree characteristics. The stands, located throughout western Washington, were 26 to 37 years old; they occurred at various elevations (110–1300 m) and on different soil types, and varied greatly in associated plant species. Site index at 50 years breast-high age ranged from 12 to 24 m. Terminal growth per year during the previous 3 years, needle number per centimetre of twig tissue, needle weight and area, and foliar concentrations of 13 elements varied among the 19 stands. Compared with associated western conifers, silver fir had moderate terminal growth, larger and heavier needles, more needles per centimetre of twig tissue, and lower foliar concentrations of N, S, and Mg. There were many significant correlations among the different variables. The foliar nutrient data obtained provide base-line information for future research in nutrition and fertilization of silver fir. These data and the significant correlations between nutrients and site-stand characteristics suggest that (i) silver fir may be more efficient than some western conifers in use of some nutrients, (ii) productivity of silver fir may be improved by application of certain fertilizers; fertilization may be particularly effective during the seedling stage when growth is typically slow, and (iii) levels of some foliar nutrients may be useful as indicators of site quality for silver fir production.

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.

Effects of Thinning and Fertilization on Foliar Nutrient Concentrations of Sugar Maple

1975 ◽  
Vol 5 (3) ◽  
pp. 410-413 ◽  
Author(s):  
D. M. Stone ◽  
D. R. Christenson
Keyword(s):  
Radial Growth ◽  
Sugar Maple ◽  
Growing Season ◽  
Foliar Nutrients ◽  
Nutrient Concentrations ◽  
Foliar N ◽  
Foliar Nutrient ◽  
Foliar Concentrations ◽  
Foliar Nutrient Concentrations ◽  
Dilution Effects

Effects of thinning and fertilization on growth and foliar nutrients were studied in pole-size sugar maple (Acersaccharum Marsh.). Thinning plus fertilization resulted in significantly lower concentrations of foliar N, P, K, Mg, Cu, Zn, B, and Al in the first growing season, and of Mg, Cu, Zn, and Al in the 2nd year. Foliar nutrients in released, but nonfertilized, trees exhibited similar trends. The decreased foliar nutrient concentrations are attributed to dilution effects as a result of increased growth.Fertilization with N, P, and K significantly increased foliar concentrations of those nutrients but did not stimulate radial growth. Thinning resulted in highly significant increase in diameter growth both years.

Variation in red pine (Pinusresinosa) foliar nutrient concentrations as influenced by sampling procedure

1980 ◽  
Vol 10 (2) ◽  
pp. 233-237
Author(s):  
Edwin H. White ◽  
Eric J. Jokela
Keyword(s):  
Sampling Procedure ◽  
Red Pine ◽  
Loamy Sand ◽  
Nutrient Concentrations ◽  
Sampling Techniques ◽  
Regression Analyses ◽  
Foliar Nutrient ◽  
Glacial Outwash ◽  
Foliar Concentrations ◽  
Foliar Nutrient Concentrations

Paired foliar samples were collected by shooting with a shotgun versus climbing and clipping near terminal foliage from twentythree 40-year-old Pinusresinosa Ait. trees located on a glacial outwash loamy sand. Samples were analyzed for N, P, K, Ca, and Mg concentrations. Regression analyses indicated that the foliar nutrient concentrations of the "shot" samples, which came from the lower crown, would be poor predictors for the foliar nutrient concentrations of the "cut' samples. Paired t-tests indicated that the shot samples consistently and significantly resulted in lower estimates of foliar concentrations of N, P, and K than did the cut samples. Shot samples were significantly higher in Ca concentrations than cut samples. The results indicate that caution is advised in the use of sampling techniques that do not result in foliar samples being collected from proven diagnostic, standardized near-terminal crown positions.

Foliar chemical concentrations, growth, and site productivity relations in western red cedar

1986 ◽  
Vol 16 (5) ◽  
pp. 1069-1075 ◽  
Author(s):  
M. A. Radwan ◽  
Constance A. Harrington
Keyword(s):  
Soil Ph ◽  
Nutrient Management ◽  
Site Index ◽  
Essential Elements ◽  
Site Quality ◽  
Stand Age ◽  
Base Line ◽  
Red Cedar ◽  
Foliar Concentrations ◽  
Western Red Cedar

Important site and tree characteristics of western red cedar (Thujaplicata Donn ex D. Don) were examined in 19 natural stands in the coastal and interior zones of western Washington and Oregon, U.S.A., and in western Vancouver Island, British Columbia, Canada. The stands occurred at various elevations and on different soil types and differed in age, soil pH, and associated plant species. Current-year foliage was collected during the winter and concentrations of N, P, K, S, Ca, Mg, Fe, Mn, B, Zn, Cu, Mo, Al, and the chlorophylls were determined. Mean terminal growth during the previous 3 years and site index at 50-year breast-height age were calculated for each stand. Site index ranged from 18 to 26 m. Terminal growth and foliar concentrations of the macronutrients, micronutrients, Al, and the chlorophylls varied among the 19 sites and between the two zones. Compared with known values for the most common associated conifers, foliar concentrations of red cedar were especially low in Mn and Al and high in Ca and Mo. Site index was correlated positively with N, the chlorophylls, S, Cu, and B, and negatively with Fe and Al. Also, N was positively correlated with the chlorophylls and with some of the other nutrients; there were many correlations among the nutrients and between some nutrients and soil pH or stand age. The data obtained provide base-line information for future analytical work with red cedar foliage. In addition, results suggest that (i) nutrient management strategies in western red cedar stands may differ from those for other conifers and different strategies may be necessary for the coastal and interior zones, (ii) productivity of red cedar may be improved by cultural treatments, including fertilization, which would enhance levels of chlorophyll as well as some essential elements (N, S, P, B, and Mo) in the foliage, (iii) levels of some chemicals in the foliage, such as N, chlorophyll, S, and B, may be useful as indicators to assess site quality for red cedar production, and (iv) chlorophyll may be used as a simple means to estimate N status of red cedar.

scholarly journals Response of a Scots pine (Pinus sylvestris) stand to application of phosphorus, potassium, magnesium and lime. 3. Foliar nutrient concentrations and stand development

1993 ◽  
Vol 41 (4) ◽  
pp. 291-307
Author(s):  
G. Arnold ◽  
A. Van Diest
Keyword(s):  
Scots Pine ◽  
Volume Growth ◽  
Stem Volume ◽  
Nutrient Concentrations ◽  
Growth Responses ◽  
Foliar Nutrient ◽  
Foliar Concentrations ◽  
Foliar Nutrient Concentrations ◽  
Annual Volume ◽  
Individual Trees

In 1985-88, a 25-yr-old Scots pine forest in Netherlands was limed and fertilized with P, K and Mg in a factoral design. This paper addresses effects of these treatments on foliar nutrient concentrations and tree growth. Stem volume increments of individual trees were measured. Average annual volume growth was estimated to be about 16 msuperscript 3/ha, which may be a slight underestimation. P and K showed increased foliar concentrations immediately after treatment and were the only elements that significantly increased volume growth in 1988-91. Additional annual volume growth of individual trees brought about by P and K corresponded with 0.9 and 2.2 msuperscript 3/ha, respectively. Foliar Mg and Ca increased later and insignificantly reduced and increased volume growth, respectively. Lime and Mg applications tended to lower foliar N. When absolute foliar concentrations and element ratios were compared to Dutch and German standards, it appeared that application of some of these standards in present research would not always have given a fully correct prediction of growth responses to nutrient additions.

Characteristics of Arboreal Marsupial Habitat in the Semi-Arid Woodlands of Northern Queensland.

1996 ◽  
Vol 23 (2) ◽  
pp. 185 ◽  
Author(s):  
SA Munks ◽  
R Corkrey ◽  
WJ Foley
Keyword(s):  
Water Concentration ◽  
Basal Area ◽  
Faecal Pellet ◽  
Nutrient Concentrations ◽  
Brushtail Possum ◽  
Phascolarctos Cinereus ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Arboreal Habitat ◽  
Semi Arid

The distribution of the koala (Phascolarctos cinereus) and the common brushtail possum (Trichosurus vulpecula) within the Prairie-Torrens Creek Alluvials province of the Desert Upland region of north-western Queensland was examined. The optimum habitat for each species as indicated by the occurrence of faecal pellet groups was found to be that associated with creek-lines. However, other land types were also used by each species to varying degrees. The relationship between various habitat variables and pellet group counts was investigated using Multiple regression and a Generalised linear model. Proximity to creek-bed, total basal area of trees, species richness and Acacia basal area (negative) best explained the occurrence of koalas. Proximity to creek-bed, Acacia basal area (negative), total basal area of trees, and available water (negative) best explained the occurrence of brushtail possums. In contrast to studies of arboreal species in the moist-south-eastern forests of Australia no relationship was found between foliar nutrient concentrations and the occurrence of koalas or brushtail possums. However, a significant relationship was found between leaf water concentration and the occurrence of koalas. It is suggested that water availability is the paramount factor defining preferred arboreal habitat in arid and semi-arid woodlands.

scholarly journals Effects of fertilisation on growth and nutrition of Norway spruce on a harsh mountain site

2013 ◽  
Vol 59 (No. 8) ◽  
pp. 306-318 ◽  
Author(s):  
I. Kuneš ◽  
M. Baláš ◽  
V. Balcar ◽  
D. Kacálek ◽  
K. Millerová ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Slow Release ◽  
Growth Stimulation ◽  
Nutrient Concentrations ◽  
Growth And Nutrition ◽  
Mountain Site ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
Site Control ◽  
Stimulation Of

We evaluated the potential of crushed amphibolite and artificial slow-release N-P-K-Mg fertiliser to stimulate the survival, growth and nutrition of Norway spruce planted on an acidified air-polluted mountain site. Control plots and treatments with slow-release fertiliser (SRF) and amphibolite (AMT) were installed. In the SRF, forty grams of tabletted amendment were applied in the close vicinity of the trees. In the AMT, two kilograms of amendment were incorporated into the soil inside the planting hole of each tree at planting. The SRF application resulted in a significant growth stimulation of spruces. The growth stimulation by amphibolite was perceptible but not significant; this amendment, however, significantly reduced mortality. None of the amendments induced marked changes in foliar nutrient concentrations.  

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