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Water Stress Fertilization And Light Effects On The Growth Of Nodulated Mycorrhizal Red Alder Seedlings
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Book Synopsis Water Stress, Fertilization and Light Effects on the Growth of Nodulated, Mycorrhizal Red Alder Seedlings by : Chang Duck Koo
Download or read book Water Stress, Fertilization and Light Effects on the Growth of Nodulated, Mycorrhizal Red Alder Seedlings written by Chang Duck Koo and published by . This book was released on 1989 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red alder (Alnus rubra Bong.) seedlings fertilized with NH4NO3 or inoculated with a pure culture Fran/cia and inoculated with live or dead spores of the mycoirhizal fungus Alpova diplophloeus (Zeller & Dodge) Trappe & Smith were grown in a growth chamber or in a greenhouse for six months Frankia inoculation and subsequent modulation and N2-fixation increased seedling growth more than N-fertilization Alpova inoculation significantly increased seedling growth in some parameters by increments of 6 to 16 % but only when the seedlings were also inoculated with Frankia. Water stress significantly decreased nodule and Alpova ectomycorrhiza development, N2-fixation, growth and photosynthesis of red alder seedlings Alpova inoculation did not improve water relations of red alder seedlings Heavy N-fertilization with 5 ml of 50mM NH4NO3 per seedling three times a week significantly increased mycorrhiza formation and N and P concentration m leaves but decreased N-fixation, shoot growth and P concentration in nodules P fertilization with 5 ml of 5mM KH2PO4 per seedling three times a week significantly increased total N-fixation Light intensities below photosynthetic photon flux density of 220 umol/m2/s significantly decreased N2- fixation, total plant growth and photosynthesis, but increased leaf area, shoot to root ratio and N and P concentrations in plant tissues Reduced light significantly decreased Alpova mycorrhiza formation after three-weeks shading in Experiment 1 but not after ten-weeks shading of Experiment 2 During the long shade exposure of Experiment 2, alder seedlings adapted morphologically to low light intensity, thus moderating negative effects on mycorrhiza formation, plants were unable to do this in the 3-week shade period of Experiment 1 Results suggest that Frankia is more important for Alpova mycorrhiza formation and growth of red alder seedlings than Alpova is for nodule formation and growth Alder seedlings apparently adapt to a certain point of light stress by increasing leaf area and shoot growth and maintain balanced symbiont development and growth N-fertilization does not affect modulated alder plant growth. The importance of P fertilization and mycorrhizae to plant growth increases with plant size and age.
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 1990 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings by : M. A. Radwan
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by M. A. Radwan and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Publications of the Cascade Head Experimental Forest and Scenic Research Area, Oregon Coast Range, 1934 to 1990 by : Sarah Greene
Download or read book Research Publications of the Cascade Head Experimental Forest and Scenic Research Area, Oregon Coast Range, 1934 to 1990 written by Sarah Greene and published by . This book was released on 1991 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frankia Symbiosis written by P. Normand and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 12th meeting on Frankia and Actinorhizal Plants that took place in Carry-le-Rouet, France in June 2001 was the opportunity for scientists to communicate about latest developments on this symbiosis that concerns a wide range of dicotyledonous plants, initiates ecological successions and is used in a number of countries to protect crops from winds or improve soil status. Selected papers on plant ecology, Frankia's genetics or physiology, and host plants' genetics or physiology are published in this special Plant & Soil issue.
Book Synopsis The Biology and Management of Red Alder by : David E. Hibbs
Download or read book The Biology and Management of Red Alder written by David E. Hibbs and published by . This book was released on 1994 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red Alder, the Northwest's most common hardwood, is of increasing biological and economic importance to the region. This timely study examines current knowledge about red alder and its role in Northwest forests.
Book Synopsis Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings by : M. A. Radwan
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by M. A. Radwan and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Contribution written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Pakistan Journal of Forestry by :
Download or read book The Pakistan Journal of Forestry written by and published by . This book was released on 1994 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1989 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings by :
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Red Alder written by Glenn R. Ahrens and published by . This book was released on 1992 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Special Publication written by and published by . This book was released on 1985 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Carbon Allocation of Red Alder Seedlings Grown Over a Density Gradient by : Peter A. Giordano
Download or read book Growth and Carbon Allocation of Red Alder Seedlings Grown Over a Density Gradient written by Peter A. Giordano and published by . This book was released on 1989 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The amount and quality of competition among individuals in developing plant communities is an important factor determining community structure, composition and development. In perennial plant communities, this competition is reflected by shifts in carbon allocation among plant parts and can result in long-term structural differences between neighboring individuals. This study was designed to provide information on the mechanics of the competitive process and the effect of competition on aboveground tree growth. Plots with a wide range of spacings of red alder seedlings were planted 4 years ago in the Cascade Head Experimental Forest on the central Oregon Coast Range of mountains. Biweekly growth measurements of stem and branch components and predawn plant water potential were made throughtout the growing season. Branch samples taken from the plot were destructively ana1yed to determine biomass and leaf area. Combining these measurements with regression equations previously developed from the site, parameter values from regression models are used to compare differences in growth and carbon allocation among trees grown at different levels of intraspecific competition. Increased density produced significant reductions in leaf area, height, basal diameter and biomass of the red alder trees. Increased density also produced significant reductions in the relative biomass growth rate. A gradient of plant water potential was present on several measurement days during the growing season. Growth analysis of these dates showed that predawn plant water potential was a significant factor determining overall tree relative growth rate as well as branch and leaf area relative growth rate. A negative exponential relationship described the relationship between overall relative aboveground biomass growth rate and predawn water stress. Relative growth rate declined sharply at a water stress level between -0.3 and -0.4 MPa. Above this water stress level, yearly relative growth rates were fairly uniform at a value of 1. The relationship between water stress and branch and leaf area relative growth rate also approached a negative exponential relationship as the intensity of the water stress gradient increased. Examination of the tallest and shortest trees at the two lowest spacings found significant differences in leaf area, percent biomass allocated to branches, and crown depth. This study showed that the effects of competition on growth and allocation of biomass, and leaf area can be significantly affected by periods of water stress lasting only a few weeks.
Book Synopsis Regenerating Coastal Forests in Oregon by :
Download or read book Regenerating Coastal Forests in Oregon written by and published by . This book was released on 1996 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This annotated bibliography was compiled to provide a comprehensive list of sources on the ecological factors that affect forest regeneration. Abstracts from 494 publications are indexed by author, species, and subject, and are arranged into 4 major sections. Topics include the effects of biotic factors, abiotic factors, and stand and site history on vegetation, effects of vegetation on aerial and soil resources, effects of vegetation on stand development, vegetation management, plant succession, and response of vegetation to silvicultural activities and disturbances. The citations are predominately for coastal Douglas-fir occurring west of the Cascade Range in Oregon and Washington; however, applicable citations for associated conifers, hardwoods, shrubs, and herbs and for Alaska, California, and British Columbia are also included. Citations on forest genetics, seeds, seedling physiology, and insects are not included in the bibliography.
Book Synopsis Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings (Classic Reprint) by : M. A. Radwan
Download or read book Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings (Classic Reprint) written by M. A. Radwan and published by Forgotten Books. This book was released on 2018-09-11 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Effects of Fertilization on Growth and Foliar Nutrients of Red Alder Seedlings This study was designed to assess effects of various fertilizers applied, singly and in combination, to red alder seedlings grown in different soils. The study consisted of two separate experiments, with seedlings from the same seed source used in both experiments. Experiment 1 (1981-82) compared untreated controls and five different fertilizers applied singly at two different rates each. In experiment 2 (1982 comparisons were made between controls, a single fertilizer, and six differ ent fertilizer mixtures. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis Comparative Effects of Urea Fertilizer and Red Alder in a Site III, Coast Douglas-fir Plantation in the Washington Cascade Range by :
Download or read book Comparative Effects of Urea Fertilizer and Red Alder in a Site III, Coast Douglas-fir Plantation in the Washington Cascade Range written by and published by . This book was released on 2005 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five randomly assigned treatments were used to quantify effects of adding varying numbers of red alder (Alnus rubra Bong.) or nitrogen (N) fertilization on growth of a 10-year-old conifer plantation at a medium quality site in the western Washington Cascade Range. Zero, 20, 40, and 80 alder trees per acre were retained along with about 300 conifers per acre. Nearly all conifers were coast Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco). A fifth treatment substituted N fertilizer for N-fixing alder. Changes in average tree height, and in numbers of trees, basal area, and volume per acre between plantation ages of 10 and 27 are compared. In pure conifer plots, gross volume growth averaged 26 percent greater on fertilized than nonfertilized plots, indicating measurable benefits of additional N. On both fertilized and nonfertilized plots, an average of 13 percent of the original conifers died. Retaining 20, 40, or 80 alder per acre (7, 13, and 27 percent of the associated conifer trees per acre, respectively) was associated with reduced numbers of Douglas-fir by about 19, 5, and 17 percent, respectively, in the next 17 years. Mortality and growth of Douglas-fir were not related to alder density, but losses of Douglas-fir were especially large on plots where relatively large red alder (20 per acre) were retained. Neither total stand nor conifer yields were changed by retaining alder. Additional comparisons are needed at other locations, especially those with known N deficiency.
