In order to study the effects of different amendments on water and salt transport in saline soil under drip irrigation conditions,this study used an indoor infiltration test with dual-point source soil column to investigate the change of the moisture peak in the soil column and the transport of wa-ter and salt within the wetting body under the conditions of different amendments with the same drip head flow rate(0.3 L/h).The results of the study showed that the addition of amendments had a sig-nificant effect on water infiltration reduction,especially in the soil treated with humic acid at an appli-cation rate of 1.0 g/kg,the deepest point that vertical wetting front reached is about 11 cm from the surface,which was 9 cm smaller than that of the control group without amendments.The amend-ments significantly increased the average volumetric water content and desalination rate of the wetting body.Compared with the control group,the average volumetric water content of soil moisture in-creased by 28%and the desalination rate increased by 20%when treated with humic acid at a dosage of 1.0 g/kg,while the average volumetric water content of the soil treated with 1.0 g/kg of biological bacteria increased by 4%and desalination rate increased by 15.1%.Under the same drip flow rate,although the average volumetric water content and the desalination rate of the soil wetted body treated with humic acid at 1.0 g/kg was the highest,the wetted body was the smallest,the range of desalina-tion was the smallest,and surface ponding occurred,which resulted in a waste of water.In summary,the soil amended with 1.0 g/kg of biofungus is more suitable for planting oil sunflower,corn and oth-er drought-tolerant crops with deep roots in Nanliang Farm,Ningxia.
saline soilsdual-point source infiltrationwater and salt transportwetted bodies
NETL
NSTL
万方数据
