Full TGIF Record # 245608
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Author(s):Aslan, M.; Drijber, R. A.; Powers, W. L.; Shearman, R. C.; Gaussoin, R. E.; Streich, A. M.
Author Affiliation:Aslan, Drijber, and Powers: Dep. of Agronomy; Shearman, Gaussoin, and Streich: Dep. of Horticulture, Univ. of Nebraska, Lincoln, NE
Title:Accumulation of microbial biomass within particulate organic matter of aging golf greens
Meeting Info.:February 17, 2000
Source:Research Committee Report for the 2000 Annual MembersMeeting of the O. J. Noer Research Foundation. 2000, p. [39-72].
# of Pages:34
Publishing Information:s.l.: O. J. Noer Turfgrass Research Foundation
Abstract/Contents:"In agroecosystems microbial biomass (MB) is a key variable controlling soil organic matter (SOM) dynamics, functioning primarily as an agent for the transformation and cycling of carbon and associated plant nutrients within the soil. Knowledge about the nature and distribution of SOM is critical to understanding its functions. However, we have limited knowledge on either the nature or distribution of SOM within highly managed ecosystems, such as golf greens. In the fall of 1996, 47 greens were sampled from 12 golf courses located within 100 miles of Lincoln NE. Although limited by sandy textures, stable microaggregation was generally greater in greens with MB accumulations above ~65 nmol lipid phosphate g-1 oven dry soil. We observed a significant positive linear relationship of MB to age of 12 golf greens, sampled from 8 courses, between 4 and 28 years old. The soil was further separated into its mineral (MF) and particulate organic matter (POM) fractions using sodium metatungstate (p=2.3 g ml-1). MB in POM increased significantly with green age while MB in MF remained relatively constant. The portion of MB associated with POM increased significantly from 25.6% for an 8 yr old green to 77.8% for a 28 yr old one. This increase of MB in POM resulted mainly from increased mass of POM although an increase in MB per unit mass of POM was also observed. Carbon in fulvic acid (Cf) and humic (Ch) acid fractions increased with green age from 0.05 to 0.35 g 100 g-1 soil and from 0.08 to 0.45 g 100 g-1, respectively. As greens aged, inclusion of a larger portion of MB in POM is accompanied by inclusion of a larger portion of humus in POM. Humus fraction ratio (Ch / Cf), ranged from 1.2 to 1.8, and showed no trend with green age. The ratio of absorbances of humic acid at 465 to 665 nm ranged from 4.5 to 7.7, showing no trend with age. These results are among the first to show the patterns of both microbial biomass development ad SOM accumulation in golf greens."
Note:"Journal paper No. 12775 of the Agricultural Research Division, Univ. of Nebraska, Lincoln"
"Compiled by James J. Spindler, Agronomist and Research Director"
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Aslan, M., R. A. Drijber, W. L. Powers, R. C. Shearman, R. E. Gaussoin, and A. M. Streich. 2000. Accumulation of microbial biomass within particulate organic matter of aging golf greens. Research Committee Report for the 2000 Annual MembersMeeting of the O. J. Noer Research Foundation. p. [39-72].
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