Journal of Food, Agriculture and Environment

Groundwater evaporation from saline soil under plastic mulch with different percentage of open area

Author(s):

Wen-Juan Shi ¹*, Xu-Guang Xing ¹, Zhen-Hua Zhang ^{1, 2}, Quan-Jiu Wang ¹

Recieved Date: 2013-01-14, Accepted Date: 2013-04-28

Abstract:

The indoor laboratory of evaporation from soil column were carried in order to study behaviors of groundwater evaporation from saline soil and its calculation method under plastic mulching with different percentage of open area (DPOA). The results showed that behavior of groundwater evaporation from saline soil is different from that from non-saline soil, and soil salinity is one of the main factors causing the evaporation from the steady evaporation to unsteady one under the shallow water table, this is because the salt crust in soil surface is developed in initial evaporation phase and the developed salt crust in return inhibits the water evaporation. Plastic mulching can significantly weaken groundwater evaporation and reduce accumulated groundwater evaporation compared with that for no plastic mulching. In the cases of POA for 3.24%, 9.97% and 20.27% respectively, soil accumulated groundwater evaporation reduces by 79.87%, 74.19% and 77.93% respectively as compared with the control at the end of evaporation. Soil moisture in profile keeps relative stable for different treatments. Based on calculating method for groundwater evaporation rate from bare soil, the paper gives a new calculating method in the conditions of plastic mulching which considers the influence of soil salt content on groundwater evaporation as well, and the calculated values agree well with the measured one. It is expected that this study may be used as a step stone for further study on groundwater evaporation from saline soil under plastic mulching with DPOA.

Keywords:

Plastic mulching with different percentage of open area, saline soil, groundwater evaporation, calculation method

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1268-1271

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