Microbial biomass C and N, and respiratory activity in soil of repeatedly limed and N- and P-fertilized Norway spruce stands
Microbial biomass C and N, and respiratory activity in soil of repeatedly limed and N- and P-fertilized Norway spruce stands
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DOI：
10.1016/0038-0717(94)90109-0
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发表时间：
1994-08
影响因子：
9.7
通讯作者：
A. Smolander;A. Kurka;V. Kitunen;E. Mälkönen
中科院分区：
文献类型：
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作者：
A. Smolander;A. Kurka;V. Kitunen;E. Mälkönen
我们的目的是评估长期的影响，反复石灰和N和P添加对土壤微生物生物量和活性。试验地点为4个40-60年生挪威云杉（PiceabiesL.）在矿物质土壤上生长的林分。在30年的研究期间，细磨石灰石的累积量总计为6000 kg ha − 1，肥料N和P的总量分别为530 - 950和70 - 115 kg ha − 1。以有机质为基础，施用石灰增加了土壤微生物生物量C，降低了土壤微生物生物量N及其占土壤总N的比例，降低了土壤微生物呼吸速率。施氮使土壤麦角甾醇含量略有增加，表明真菌生物量增加或真菌种群结构发生变化。各处理间微生物C：N比和呼吸：生物量比差异不显著。没有观察到明显的P添加效果。
Our aim was to assess long-term effects of repeated liming and N and P additions on soil microbial biomass and activity. The experimental sites were four, 40–60 yr old, Norway spruce (Picea abiesL.) stands growing on mineral soil sites. During the 30 yr study period, the cumulative amount of finely-ground limestone totalled 6000 kg ha−1, and fertilizer N and P totalled 530–950 and 70–115 kg ha−1, respectively. The main effects of the additions, expressed on an organic matter basis, were as follows: liming increased, and N addition decreased, both the fumigation-extraction (FE) and substrate-induced-respiration (SIR) derived microbial biomass C, microbial biomass N and its proportion of total soil N, and microbial respiration rate. Nitrogen addition increased slightly the soil ergosterol content, indicating an increase in fungal biomass or a change in fungal population structure. There were no significant differences in microbial C:N ratio and respiration: biomass ratio between the treatments. No clear effects of P addition were observed.