The radius,number and distribution of soil macropores under artificial Chinese pine(Pinus tabuleaformis Carr.)forest were quantitatively researched by the water breakthrough curve and Poiseulle equation.The radius of soil macropore,which is defined as the pores between field capacity and saturated water content,is 0.2~3 mm,of which the macropores with the radius larger than 1mm account for only 2.2% of total macropore number.And there are more macropres in the upper layers of soil profiles than those in the...
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