EFFECT OF CATTLE SLURRY IN GRASSLAND ON MICROBIAL BIOMASS AND ON ACTIVITIES OF VARIOUS ENZYMES

被引:86
作者
KANDELER, E [1 ]
EDER, G [1 ]
机构
[1] FED RES INST AGR ALPINE REG,A-8952 IRDNING,AUSTRIA
关键词
MICROBIAL BIOMASS; SOIL ENZYMES; NITRIFICATION; CATTLE SLURRY; GRASSLAND SOILS;
D O I
10.1007/BF00369300
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
We examined the long-term effects of cattle slurry, applied at high rates, on microbial biomass, respiration, the microbial quotient (qCO2) and various soil enzyme activities. In March, June, July, and October 1991, slurry-amended grassland soils (0-10 cm) contained significantly higher levels of microbial biomass, N mineralization and enzyme activities involved in N, P, and C cycling. With microbial biomass as the relative value, the results revealed that the slurry treatment influenced enzyme production by the microbial biomass. High levels of urease activity were the result not only of a larger microbial biomass, but also of higher levels of enzmye production by this microbial biomass. The ratio of alkaline phosphatase and xylanase to microbial biomass was nearly constant in the different treatments. The metabolic quotient (qCO2) declined with increased levels of slurry application. Therefore it appears that microorganisms in slurry-amended soils require less C and energy if there is no competition for nutrients. The results of this study suggest that urease activity, nitrification, and respiration (metabolic quotient) can be used as indicators of environmental stress, produced by heavy applications of cattle slurry.
引用
收藏
页码:249 / 254
页数:6
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