Relationship between the Amount of Organic Material Applied and Soil Biomass Content

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概要

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• The relationship between the amount of organic material applied and soil biomass content was examined in soils amended with various organic materials in 4 upland experimental fields. The values of the soil biomass measured by the direct microscopic method (DMM), ATP content, and soil respiration rate in the soil amended with organic material were greater than those in the soil amended with inorganic fertilizer in all the fields. Soil biomass measured by the DMM and ATP content were highly correlated with the sum of the amount of hot water-soluble organic substance, carbohydrate, and crude protein components in the organic material applied in all the fields. Soil respiration rate was also highly correlated with the sum of the amount of these components applied in the 3 fields. These results suggest that hot water-soluble organic substance, carbohydrate, and crude protein components in organic material are closely related to the increase of the soil biomass. The difference in the soil biomass C content calculated from the ATP content among the 4 fields generally paralleled the difference in the soil total C content. The ratio of biomass C to the total C in the field with a high total C content was lower than that in field with a low total C content. The rates of ncrease of the soil biomass measured by the DMM, ATP content, and soil respiration rate in the field with short-term application of organic material were higher than those in the field with long-term application. These findings suggest that the rate of increase of the soil biomass is high when the duration of application of organic material is short.

• 社団法人日本土壌肥料学会の論文

著者

• Sakamoto Kazunori

  Institute Of Applied Biochemistry University Of Tsukuba

• Oba Yutaka

  Institute of Applied Biochemistry, University of Tsukuba

• Oba Yutaka

  Institute Of Applied Biochemistry University Of Tsukuba

• Oba Yutaka

  Institute Of Applied Biochemistry The University Of Tsukuba

関連論文

• In Situ MEASUREMENT OF SOIL RESPIRATION RATE BY A DYNAMIC METHOD
• Relationship between the Amount of Organic Material Applied and Soil Biomass Content
• DECOMPOSITION OF SEWAGE SLUDGE IN SOIL : III. Nitrogen Mineralization of ^N-Labeled Sewage Sludge in Soils
• Characteristics of Soil Humic Substances Fractionated in Relation to Particle Weight : VI. Particle Weight Distribution, Optical Properties, and Infrared Absorption Spectra of Fractions of Humic Acids with Different Particle Weights

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