Premium
The Effect of Sprinkling Intensity and Soil Type on Oxygen Flux During Irrigation and Drainage
Author(s) -
Gornat B.,
Enoch H.,
Goldberg D.
Publication year - 1971
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1971.03615995003500050016x
Subject(s) - loam , irrigation , soil water , drainage , flux (metallurgy) , infiltration (hvac) , water content , environmental science , soil science , oxygen , hydrology (agriculture) , moisture , surface irrigation , chemistry , materials science , agronomy , geology , geotechnical engineering , ecology , composite material , organic chemistry , biology
The effect of sprinkling intensity on oxygen flux in sand, loam, and clay soil was measured with platinum electrodes. In all three soils, the interval between two consecutive irrigations could be divided into four periods: (i) From the beginning of irrigation until the wetting front reached the electrode, the reduction current was unrelated to oxygen flux and the measurements were meaningless. (ii) When the wetting front reached the electrode, high values were recorded. From then on, the oxygen flux decreased to a minimum value by the end of the irrigation. (iii) Shortly after irrigation and until drainage had almost ceased, flux increased to a new peak. (iv) Hereafter, the reduction current decreased although the real oxygen diffusion presumably increased. Oxygen flux was higher at the low irrigation intensity, which is attributed to a lower soil moisture content during infiltration at this rate. Aggregate breakdown and crust formation on the soil surface due to the high irrigation intensity inhibit gas exchange.