Author : Kevan Joseph Minick
Publisher :
ISBN 13 :
Total Pages : 35 pages
Book Rating : 4.:/5 (488 download)
Book Synopsis Microbial Nitrogen Cycling Response to Calcium and Phosphorus in Northern Hardwood Forest Soils at the Hubbard Brook Experimental Forest, New Hampshire by : Kevan Joseph Minick
Download or read book Microbial Nitrogen Cycling Response to Calcium and Phosphorus in Northern Hardwood Forest Soils at the Hubbard Brook Experimental Forest, New Hampshire written by Kevan Joseph Minick and published by . This book was released on 2009 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic soil acidification appears to be detrimental to forest health in the northeastern US possibly due to reduced microbial activity influencing plant-available nutrients. In a recent study at the Hubbard Brook Experimental Forest, soil microbial activity was not stimulated by increased pH. Therefore, microbial response to increased pH may depend on the level of calcium added or availability of other nutrients. I tested the effects of Ca and phosphorus additions in the field on microbial nitrogen transformations. High Ca addition reduced net N mineralization. Low Ca addition did not affect N transformations, but the combination of Ca/P addition reduced net N mineralization. Phosphorus addition unexpectedly increased gross nitrification. Results from this study indicate that microbial mineralization is not sensitive to moderate differences in pH or limited by P. Therefore, detrimental effects of acidic deposition to these forests are not likely a result of nutrient deficiencies related to suppression of microbial activity.