Effect of land use on microbial biomass-C,-N and-P in red soils     

陈国潮  何振立 《浙江大学学报(A卷英文版)》2003,4(4):480-484

Eleven red soils varying in land use and fertility status were used to examine the effect of land use on microbial biomass-C,-N and-P. Microbial biomass-C in the red soils ranged from about 68 mg C/kg to 225 mg C/kg, which is generally lower than that reported from other types of soil, probably because of low organic matter and high acidity in the red soils. Land use had considerable effects on the amounts of soilC _mic. TheC _mic was the lowest in eroded fallow land, followed by woodland, tea garden, citrus grove and fallow grassland, and the highest in vegetable and paddy fields. There was significant correlation betweenC _mic and organic matter content, suggesting that the influence of land use onC _mic is mainly related to the input and accumulation of organic matter. Microbial biomass-N in the soils ranged from 12.1 Nmg/kg to 31.7 Nmg/kg and was also affected by land use. The change ofN _mic with land use was similar to that ofC _mic. The microbial C/N ratio ranged from 5.2 to 9.9 and averaged 7.6. TheN _mic was significantly correlated with soil total N and available N. Microbial biomass-P in the soils ranged from 4.5 mg P/kg to 52.3 mg P/kg. The microbial C/P ratio was in the range of 4–23. TheP _mic was relatively less affected by land use due to differences in fertilization practices for various land use systems. Project (No. 40025104) supported by National Outstanding Youth Foundation of China  相似文献   

Effect of land use on microbial biomass-C, -N and -P in red soils   总被引：1，自引：0，他引：1  

陈国潮  何振立 《Journal of Zhejiang University. Science. B》2003,(4)

INTRODUCTIONTheimportanceofmicroorganismstosoilfer tilityandsoilqualityhasbeencommonlyaccept ed (Smithetal.,1 990 ;Brookes,1 995;Da lal,1 998;Wicketal.,1 998) .Soilmicrobialbiomassasanimportantmicrobialpropertyhasbeenextensivelystudiedsinceitisthelivingco…  相似文献