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| 1 | C:N:P stoichiometry and nutrient limitation of the soil microbial biomass in a grazed grassland site under experimental P limitation or exces显示文摘Introduction:The availability of essential nutrients,such as nitrogen(N)and phosphorus(P),can feedback on soil carbon(C)and the soil microbial biomass.Natural cycles can be supplemented by agricultural fertiliser addition,and we determined whether the stoichiometry and nutrient limitation of the microbial biomass could be affected by an unbalanced nutrient supply.Methods:Samples were taken from a long-term trial(in effect since 1968)with annual applications of 0,15 and 30 kg P ha^(−1) with constant N and potassium.Soil and microbial biomass CNP contents were measured and nutrient limitation assessed by substrate-induced respiration.Linear regression and discriminant analyses were used to identify the variables explaining nutrient limitation.Results:Soil and biomass CNP increased with increasing P fertiliser,and there was a significant,positive,correlation between microbial biomass P and biomass C,apart from at the highest level of P fertilisation when the microbial biomass was over-saturated with P.The molar ratios of C:N:P in the microbial biomass remained constant(homeostatic)despite large changes in the soil nutrient ratios.Microbial growth was generally limited by C and N,except in soil with no added P when C and P were the main limiting nutrients.C,N and P,however,did not explain all the growth limitation on the soils with no added P.Conclusions:Increased soil C and N were probably due to increased net primary production.Our results confirm that C:N:P ratios within the microbial biomass were constrained(i.e.homeostatic)under near optimum soil conditions.Soils with no added P were characterised by strong microbial P limitation and soils under high P by over-saturation of microorganisms with P.Relative changes in biomass C:P can be indicative of nutrient limitation within a site. | Bryan S Griffiths Annette Spilles Michael Bonkowski | 2012 | Ecological Processes2012，1，1： | 23 |
| 2 | 土壤食细菌线虫的原位富集培养方法显示文摘采用两种孔径的尼龙网袋(1mm和5μm),将盆钵供试土壤分成内外两层,内层土壤混合猪粪或稻草,并以不添加猪粪和稻草的供试土壤作为空白;外层直接接入供试土壤,进行培养,以获取土著食细菌线虫大量富集的试验土壤。结果表明:添加基质(猪粪和稻草)显著地促进了土壤线虫的繁殖,大量繁殖的线虫通过1mm网袋迁移至外层未加基质的土壤,而采用5μm网袋则限制了线虫向外层土壤的迁移。添加猪粪的1mm网袋处理经过28d培养后,外层土壤线虫数是空白处理的9.1倍;添加稻草的1mm网袋处理经过35d培养后,外层土壤线虫数是空白处理的5.9倍。添加两种基质的5μm网袋处理,外层土壤线虫数和空白处理差异不大。添加基质主要是促进了食细菌线虫的繁殖,在培养结束时,添加猪粪的1mm网袋处理的食细菌线虫比例达到98.2%,添加稻草的1mm网袋处理的食细菌线虫比例达到90.5%,两个处理食细菌线虫的总数分别是空白处理的14.8倍和8.9倍,并且主要是Protorhabditis sp.线虫的增加。 | 毛小芳 胡锋 陈小云 Griffiths Bryan 李辉信 | 2007 | 生态学报2007，27，2： | 6 |
| 3 | A microsatellite map of white clover显示文摘 | B. Barrett A. Griffiths M. Schreiber N. Ellison C. Mercer J. Bouton B. Ong J. Forster T. Sawbridge G. Spangenberg G. Bryan D. Woodfield | 2004 | Theoretical and Applied Genetics2004，，3： | 1 |
| 4 | Scale-up of suspension and anchorage-dependent animal cells显示文摘 | Bryan Griffiths | 2001 | Molecular Biotechnology2001，，3： | 1 |
| 5 | Root-induced nitrogen mineralisation: A nitrogen balance model显示文摘 | Bryan Griffiths David Robinson | 1992 | Plant and Soil1992，，2： | 1 |
| 6 | Insights into the resistance and resilience if the soil microbial community显示文摘 | Bryan S Griffiths Laurent Philippot | 2013 | FEMS Microbiol Rev2013，37，2： | 1 |
| 7 | Effects of compost stability on plant growth, microbiological parameters and nitrogen availability in medis containing mixed garden-waste compost 显示文摘 | ALAN--A KEELING BRYAN S GRIFFITHS KARL RITZ | 1995 | Bioresouurce Technology1995，54，： | 1 |
| 8 | A microsatellite map of white clover显示文摘 | B. Barrett A. Griffiths M. Schreiber N. Ellison C. Mercer J. Bouton B. Ong J. Forster T. Sawbridge G. Spangenberg G. Bryan D. Woodfield | 2004 | Theoretical and Applied Genetics2004，，3： | 1 |
| 9 | Dynam- ics of nematode assemblages and soil function in adja-cent restored and degraded soils following disturbance 显示文摘 | Liu M Q Chen X Y Bryan S Griffiths | 2012 | European Journal of Soil Biology2012，49，： | 1 |
| 10 | 查看详情显示文摘 | Ivanov P Griffiths T Bryan N D | | 0，，： | 1 |
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