INFLUENCE OF WATER-CONTENT AND SOIL PROPERTIES ON UNSATURATED HYDRAULIC CONDUCTIVITY OF SOME RED AND BLACK SOILS

被引：9

作者：

BHATNAGAR, D

NAGARAJARAO, Y

GUPTA, RP

机构：

[1] Division of Agricultural Physics, Indian Agricultural Research Institute, New Delhi

来源：

ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE | 1979年 / 142卷 / 01期

关键词：

D O I：

10.1002/jpln.19791420111

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The unsaturated hydraulic conductivity was determined in the laboratory for some red and black soils, following water movement into a horizontal column of homogeneous soil of uniform packing. A highly significant positive relationship was found between moisture content and hydraulic conductivity values in all the soils studied. Correlation coefficients calculated for the relationships between soil constituents/properties and the change in hydraulic conductivity per unit change in moisture content (regression coefficient between hydraulic conductivity and moisture content) have shown positive relationship to sand and negative relationships to silt, silt + clay, clay, carbonates, aggregates > 0.25 mm and saturated hydraulic conductivity. The unsaturated hydraulic conductivity decreases rapidly with decrease in moisture content and this decrease depends on the soil constituents/properties and differences between soil types are clear.

引用

页码：99 / 108

页数：10

共 16 条

[11]

KRAHMER V, 1974, Z PFLANZ BODENKUNDE, V137, P94

[12] LIMITATION TO WATER FLUX FROM SOILS TO PLANTS [J].

LANG, ARG ;

GARDNER, WR .

AGRONOMY JOURNAL, 1970, 62 (06) :693-&

[13]

NIELSEN D. R., 1962, SOIL SCI SOC AMER PROC, V26, P107

[14] NUMERICAL SOLUTION OF EQUATIONS OF THE DIFFUSION TYPE WITH DIFFUSIVITY CONCENTRATION-DEPENDENT [J].

PHILIP, JR .

TRANSACTIONS OF THE FARADAY SOCIETY, 1955, 51 (07) :885-892

[15]

RICHARDS L. A., 1952, TRANS AMER GEOPHYS UNION, V33, P531

[16]

YODER ROBERT E., 1936, JOUR AMER SOC AGRON, V28, P337

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