Conversion factor (k factor) for estimation of soil microbial biomass potassium by the chloroform-fumigation extraction method
Conversion factor (k factor) for estimation of soil microbial biomass potassium by the chloroform-fumigation extraction method
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DOI：
10.1080/00380768.2018.1469953
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发表时间：
2018-05
影响因子：
2
通讯作者：
Kohei Yamashita;Hiroki Honjo;M. Shinohara;S. Asakawa
中科院分区：
文献类型：
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作者：
Kohei Yamashita;Hiroki Honjo;M. Shinohara;S. Asakawa
本文测定了不同施肥条件下旱地土壤、温室条件下高地土壤和淹水条件下水田土壤的氯仿熏蒸提取法测定微生物量钾（K）的转换因子kK。kK值随土地利用方式（水田或高地）或施肥（化肥或有机肥）而变化。水田土壤的kK值（0.28-0.38）与高地土壤的kK值（0.41-0.73）存在差异。本研究表明，该值可用于氯仿熏蒸法测定土壤中微生物量钾，并有必要进一步研究不同田间管理条件下不同类型土壤中微生物量钾的含量。
ABSTRACT The conversion factor, kK, for estimation of microbial biomass potassium (K) by the chloroform-fumigation extraction method was determined for some arable soils: upland field soils under different fertilization conditions, an upland field soil under a greenhouse condition, and a paddy field soil under a flooded condition. The kK value varied with land utilization (paddy or upland) or fertilization (chemical or organic fertilizer). Value of kK was different between paddy field soil (0.28–0.38) and upland field soil (0.41–0.73). This study indicates that the value could be useful for the estimation of microbial biomass K in soil by the chloroform-fumigation extraction method and further investigation of the amounts of biomass K in different types of soils under conditions with varied field managements will be necessary.