MICROBIAL BIOMASS PHOSPHORUS IN SOILS OF BEECH (FAGUS-SYLVATICA L) FORESTS
MICROBIAL BIOMASS PHOSPHORUS IN SOILS OF BEECH (FAGUS-SYLVATICA L) FORESTS
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DOI：
10.1007/bf00336162
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发表时间：
1995-02-01
影响因子：
6.5
通讯作者：
WOLTERS, V
中科院分区：
文献类型：
--
作者：
JOERGENSEN, RG;KUBLER, H;WOLTERS, V
在德国中部以山毛榉树（Fagus sylvatica L.）为主的森林遗址中，对38个土壤进行了取样，取样深度约为10 cm，并仔细去除其上的有机层。通过烟熏萃取法估算微生物生物量P，测量nahco3可萃取磷酸盐的增加。微生物磷库的大小在17.7 ~ 174.3 μ g P g（-1）土壤之间，平均比nahco3可提取磷酸盐大7倍以上。微生物磷与土壤有机碳和全磷呈显著正相关，反映了土壤有机质作为磷源的重要性。微生物磷平均含量为全磷的13.1%，在6 ~ 18土层中变化较大。微生物P与微生物C呈极显著相关，平均比值为14.3。较宽的微生物C:P比值（5.1-26.3）表明这两个参数之间的关系并不简单。微生物碳磷比与土壤pH、阳离子交换能力呈显著正相关。
Thirty-eight soils from forest sites in central Germany dominated by beech trees (Fagus sylvatica L.) were sampled to a depth of about 10 cm after careful removal of the overlying organic layers. Microbial biomass P was estimated by the fumigation-extraction method, measuring the increase in NaHCO3-extractable phosphate. The size of the microbial P pool varied between 17.7 and 174.3 mu g P g(-1) soil and was on average more than seven times larger than NaHCO3-extractable phosphate. Microbial P was positively correlated with soil organic C and total P, reflecting the importance of soil organic matter as a P source. The mean microbial P concentration was 13.1% of total P, varying in most soils between 6 and 18. Microbial P and microbial C were significantly correlated with each other and had a mean ratio of 14.3. A wide (5.1-26.3) microbial C:P ratio indicates that there is no simple relationship between these two parameters. The microbial C:P ratio showed strong and positive correlations with soil pH and cation exchange capacity.