Study Of Pipe Drainage On Soil Desalination And Yield Of Oil Sunflower And Corn In Huinong District

Salinization is the main serious problem in agricultural production of Miaotai Township,Huinong District.Aiming at this problem,Miaotai Township had laid of the pipe drain system engineering and related engineering. The experiment was divided into two treatments of pipe drainage and non-pipe drainage as the research objects of oil sunflower and corn. The effects of drainage on soil salinity, groundwater level and yield in field were analyzed,when in the basic same field,manure and irrigation quota.It was used comparative test method. As the same time,establish the total amount of soil salinity and mass water content and conductivity to provide reference for conversion of saline soil salinity in Huinong District. The main results are as follows:1. It can be drawn of relationship about about the total amount of soil salinity and mass water content and conductivity.2. Analysising of groundwater can be found that the underground water table and groundwater mineralization of oil sunflower in the drainage area of the underground pipe were decreased.lt was decreased by 6.21% and 15.13% in two underground pipe drainage,and also reduced by 6.21% in the oil sunflower growth period.To corn,it was decreased by 3.70% and 4.50% in two pipe drainage,and also reduced by 10.29% in the oil sunflower growth period.The maximum reduction of groundwater salinity was 4.50%.There was no significant change in the water level of the drainage area of the non-underground pipe drainage.3. Analysising of soil salinity can be found that pipe drainage can reduce the soil salinity. It was decreased by 8.42% and 3.85% in two underground pipe drainage,and also increased 13.64% in the oil sunflower growth period. To corn,it was decreased by 4.44% and 6.74% in two underground pipe drainage,and also reduced by 17.90% in the oil sunflower growth period.4. Analysising of photosynthesis and actual water demand can be found that the actual water demand of oil sunflower and corn in drainage area is less than that of non-pipe drainage area.As the same irrigation quota, the actual water demand of oil sunflower and corn was firstly increased and then decreased. The actual water demand of pipe drainage area was respectively lower 2.08% and 7.08% than non-pipe drainage area.5. Analysising of yield can be found that pipe drainage was significantly helpful for increasing crop yield.Under the same irrigation technology and the same irrigation quota,oil sunflower and corn of pipe drainage area were respectively increased by 8.10% and 6.87%. Irrigation water productivity was increased 8.40% and 6.69%. WUE was increased 3.30% and 4.59%. Water production efficiency rose to by9.86% and 15.25%.