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Laboratory measurements of soil micr...

Ouimet, Nicole.

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Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers./
Author:	Ouimet, Nicole.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1994,
Description:	179 p.
Notes:	Source: Masters Abstracts International, Volume: 33-04, page: 1165.
Contained By:	Masters Abstracts International33-04.
Subject:	Agronomy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MM94494
ISBN:	9780315944947

Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers.
Ouimet, Nicole.

Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers. - Ann Arbor : ProQuest Dissertations & Theses, 1994 - 179 p.

Source: Masters Abstracts International, Volume: 33-04, page: 1165.

Thesis (M.Sc.)--McGill University (Canada), 1994.

The purpose of this study was to investigate the results of two long-term fertilization experiments on soil organic C, total N, and mineralizable N in the Jiangsu Province of People's Republic of China. The soil samples that received manure over the years contained more soil organic C, and total N than the inorganic fertilized samples. Soil organic C was closely correlated with total N and there were correlations between crop yields and soil organic C contents and between crop yields and soil total N contents. Plant-available N was estimated using biological and chemical tests. Mineralized N formed under anaerobic incubation was low except for those soil samples that received manure. Microbial biomass C and N were estimated using the chloroform fumigation-incubation method (CFIM) and fumigation-extraction procedures. Biomass measurements by CFIM were more precise and reliable than values obtained by fumigation-extraction. Treatment differences in biomass were not significant. Estimates of biomass C and N were influenced by the choice of the control soil and the period of incubation used by the CFIM. Unfumigated (10-20 d) control soils were found to be the best control for samples. Extraction of mineralized N using O.5M NaHCO$\sb3$ after incubation overestimated biomass N since this extraction was found to extract non-biomass N.

ISBN: 9780315944947Subjects--Topical Terms:

2122783
Agronomy.

Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers.
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245 1 0 $a Laboratory measurements of soil microbial biomass and nitrogen mineralization from two Chinese soils as influenced by long-term applications of manure and inorganic fertilizers.
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520 $a The purpose of this study was to investigate the results of two long-term fertilization experiments on soil organic C, total N, and mineralizable N in the Jiangsu Province of People's Republic of China. The soil samples that received manure over the years contained more soil organic C, and total N than the inorganic fertilized samples. Soil organic C was closely correlated with total N and there were correlations between crop yields and soil organic C contents and between crop yields and soil total N contents. Plant-available N was estimated using biological and chemical tests. Mineralized N formed under anaerobic incubation was low except for those soil samples that received manure. Microbial biomass C and N were estimated using the chloroform fumigation-incubation method (CFIM) and fumigation-extraction procedures. Biomass measurements by CFIM were more precise and reliable than values obtained by fumigation-extraction. Treatment differences in biomass were not significant. Estimates of biomass C and N were influenced by the choice of the control soil and the period of incubation used by the CFIM. Unfumigated (10-20 d) control soils were found to be the best control for samples. Extraction of mineralized N using O.5M NaHCO$\sb3$ after incubation overestimated biomass N since this extraction was found to extract non-biomass N.
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