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无结构土壤透气性的初步研究

花匠小妙招
2024-11-18 17:30

A PRIMARY STUDY OF PERMEABILITY OF STRUCTURELESS SOIL TO AIR

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摘要:

土壤的透气性是指土壤让空气穿透本身的能力。透气性是土壤很重要的物理性质,因为它不仅决定了土壤与大气间空气交换的速度[1],而且和土壤的持水性有关[2],测定土壤的透气性还可以了解土壤其他一系列的物理性质如排水的能力[3]、地表迳流的速度[2]、耐蚀性、空气容量[3]及其结构性的程度等等。土壤中微生物活动的方向与强度、种籽的发芽、根系的发育及其吸收能力、土壤中养分的状态[4]和影响农作物生活的其他重要土壤因素都有赖于土壤的透气性。

Abstract:

The object of this work was an investigation of the relationship between soil moisture content and soil aeration in the structureless soils, and a theoretical consideration was proposed out:For a given moilture content，the water which enters the soil must not displace,the volume of air equal to that of the water which penetrates the soil, and the decrement of permeability of soil to air will not be found to bear a linear relation to the increment of the water content, however, the permeability also probably increases as the soil is wetted. All of this has been proved by the experiment. Furthermore, the results of the experiment showed that until the moisture content of the soil increased up to the level 33-45% the antipode of the moisture content and soil aeration in structureless soils then would be ture. It has been suggested that this could happen in the so-called ideal structureless soils (soil without non-capillary pore space) only. Under natural conditions, however, in author's opinion, the antipode of soil moisture content and soil aeration in structureless soils will not be so seriously as we generally had thought of.

引用本文

陈清硕.无结构土壤透气性的初步研究[J].土壤学报,1958,6(2):123-136. CHEN CHING-SHOW. A PRIMARY STUDY OF PERMEABILITY OF STRUCTURELESS SOIL TO AIR[J]. Acta Pedologica Sinica,1958,6(2):123-136.

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