In Situ MEASUREMENT OF SOIL RESPIRATION RATE BY A DYNAMIC METHOD

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概要

• 論文の詳細を見る

• In this paper, various problems relating to the in situ measurement of soil respiration rate by a dynamic method in which CO_2 was directly measured by an infrared gas analyzer were discussed. The rate of soil respiration increased with increasing air flow rate in the dynamic method. However, the rate of CO_2 diffusion from soil to the atmosphere inside the chamber was approximately constant regardless of the air flow rate and was almost equal to that under natural conditions (without a chamber). Based on these results, it is suggested that the process of mass flow by the air flow contributed to soil respiration, that is, the suction of soil air (high CO_2 content) from soil into the chamber caused by the air flow resulted in increase of the rate of soil respiration. The rate of soil respiration measured by the dynamic method was compared with that obtained by the static method which employed an alkali solution (NaOH) to trap CO_2. The soil respiration rate as determined by the static method was 58% of that determined by the dynamic method at an air flow rate of 1.0 liter/min. The difference in the values between the two methods may be due to the decrease in the absorption efficiency of NaOH and the decrease in the rate of CO_2 diffusion and mass flow in the static method.

• 社団法人日本土壌肥料学会の論文

著者

• Yoshida Tomio

  Institute of Applied Biochetnistry, University of Tsukuba

• Sakamoto Kazunori

  Institute Of Applied Biochemistry University Of Tsukuba

• Yoshida Tomio

  Institute Of Applied Biochemistry The University Of Tsukuba

関連論文

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• In Situ MEASUREMENT OF SOIL RESPIRATION RATE BY A DYNAMIC METHOD
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• Relationship between the Amount of Organic Material Applied and Soil Biomass Content
• ELECTRON MICROSCOPIC STUDY OF ASSOCIATIVE N_2-FIXING BACTERIA IN ROOTS OF RICE SEEDLINGS
• SULFUR MINERALIZATION IN RHIZOSPHERE OF LOWLAND RICE
• NITROGEN FIXATION AND DENITRIFICATION IN THE ROOTS OF FLOODED CROPS
• ANALYSIS OF THE BEHAVIOR OF Rhizobium INOCULUM USING MARKED STRAIN IN THE RHIZOSPHERE OF SOYBEANS
• ATMOSPHERIC DINITROGEN FIXATION IN THE FLOODED RICE RHIZOSPHERE AS DETERMINED BY THE N-15 ISOTOPE TECHNIQUE

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