Nutrition and Fertilization of Forest Trees and Associated Soil Microbial Processes

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Forest Ecophysiology and Biology".

Deadline for manuscript submissions: closed (10 February 2022) | Viewed by 4187

Special Issue Editors


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Guest Editor
Department of Natural Resources and Environmental Management, University of Hawaii at Mānoa, Honolulu, HI, USA
Interests: nutrient cycling; fine root dynamics; productivity; management; modeling of Acacia koa forests; dry forests; agroforestry systems
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Guest Editor
Institute of Biology, Freie Universität Berlin, Berlin, Germany
Interests: soil fertility; microbial ecology; soil ecology; fungal diversity; roots; arbuscular mycorrhizal fungi; nutrient limitations

Special Issue Information

Dear colleagues,

Forest tree growth requires efficient uptake of essential nutrients from heterogeneous and often depleted soil environments. This process involves complex physiological regulations within roots, but also between aboveground and belowground plant parts and at the root–soil microbiome interface. Innovations in the nutrition and fertilization of forest trees from nursery-grown seedlings to well-established stands are continuously developed, with a growing understanding and acceptance of the importance of belowground networks of plant roots and associated microorganisms. New tools are available for the study of plant roots, the rhizosphere, and the soil microbiome, improving research into how conventional and organic fertilization practices and rising nutrient depositions affect plant-microbial interactions, soil microbial nutrient cycling and consequently the nutrition of trees and other forest vegetation.

This Special Issue is dedicated to reporting on new knowledge and understanding of these interactions as they relate to plant nutrition in the context of fertilization practices; environmental change and decision-making. Papers that explore novel or poorly studied interactions that can be shown to significantly influence the nutrition of economically or ecologically important trees are of particular interest for this issue. Papers that report on the use of the latest observational or analytical methods or develop new modeling frameworks to capture and/or predict the outcomes of plant-soil-microbial interactions on plant nutrition are also a high priority. Innovative or targeted fertilization approaches; practices; or fertilizer sources that attempt to promote; sustain; or influence plant–soil–microbial interactions, as well as analyses of less-studied elements are also welcome.

Dr. Travis Idol
Dr. Tessa Camenzind
Guest Editors

Manuscript Submission Information

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Keywords

  • fertilization
  • plant nutrition
  • tree growth
  • rhizosphere
  • soil microbiome
  • biogeochemistry
  • belowground interactions
  • nitrogen deposition
  • essential elements
  • mycorrhizae

Published Papers (1 paper)

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Research

9 pages, 1775 KiB  
Article
Potassium-Solubilizing Activity of Bacillus aryabhattai SK1-7 and Its Growth-Promoting Effect on Populus alba L.
by Yifan Chen, Jianren Ye and Qingqing Kong
Forests 2020, 11(12), 1348; https://doi.org/10.3390/f11121348 - 17 Dec 2020
Cited by 21 | Viewed by 3357
Abstract
In the present study, the potassium-solubilizing characteristics of Bacillus aryabhattai SK1-7 and its growth-promoting effect on plants were evaluated to determine the biotechnological potential of this bacterium in alleviating soil potassium deficiency. The potassium-solubilizing activity of SK1-7 was determined by fermentation. Additionally, the [...] Read more.
In the present study, the potassium-solubilizing characteristics of Bacillus aryabhattai SK1-7 and its growth-promoting effect on plants were evaluated to determine the biotechnological potential of this bacterium in alleviating soil potassium deficiency. The potassium-solubilizing activity of SK1-7 was determined by fermentation. Additionally, the fermentation broth was determined by flame spectrophotometry. The aluminum and silicon ion contents in SK1-7 fermentation broth were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) after digestion with nitric acid hydrogen peroxide hydrofluoric acid. Scanning electron microscopy (SEM)-based observations were performed to assess the morphological changes in potassium feldspar surfaces digested by potassium-solubilizing bacteria. In addition, the effects of SK1-7 on plant growth and soil physical and chemical properties were analyzed. After incubation for 7 days in a potassium-solubilizing medium, the concentration of potassium dissolved reached 10.8 μg/mL and the percentage of potassium released was 32.6%. The pH rapidly decreased from 7.2 to 4.321 within the first day and then further decreased to 3.90 after 7 days. After 7 days, the concentrations of aluminum and silicon in the fermentation broth were 1.01 and 24.19 μg/mL, respectively. The growth promotion assay results showed that SK1-7 has good growth-promoting effects on poplar and can effectively improve the available potassium content in poplar rhizosphere soil. The SK1-7 strain can effectively dissolve insoluble potassium to release soluble potassium ions and clearly promotes the growth of poplar after being applied to soil. Thus, the SK1-7 strain is a potassium-solubilizing microorganism with good application prospects. Full article
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