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研究了土壤微生物活性与土壤基膜吸力的关系 ,将土壤发泡点 ,即土壤导气率由 0突变为非 0时的基质吸力 ,与微生物的最高呼吸活性相联系 ,试图证明土壤微生物的最高活性发生于略高于土壤发泡点的基模吸力。对粗沙土、细沙土和砂壤土三种轻质地土壤的测定表明 ,土壤微生物的最高呼吸活性发生在略高于土壤发泡吸力的基质吸力。土壤基模吸力较小时微生物活性到达最高值的速度较慢 ,土壤基模吸力在发泡点附近时 ,微生物活性到达最高值的速度较快。
The relationship between soil microbial activity and soil basement membrane suction was studied. The soil suction point, which is the soil air permeability change from 0 to non-0, was related to the highest respiration activity of microorganisms and tried to prove the highest soil microbial Activity occurs at a modest suction slightly above the soil bubble point. The determination of three light soils, coarse sand, fine sand and sandy loam, showed that the maximum respiration activity of soil microorganisms occurred at a slightly higher suction than that of soil. When the soil base-mode suction is small, the microbial activity reaches the highest value at a relatively slow speed. When the soil base-mode suction is near the blowing point, the microbial activity reaches the highest value at a relatively high speed.