| Tu-mo-chuan plain sit in the semi-arid area,there is a plenty of acreage alkalinity soil.Simultaneous,the soil alkalinity shows an extending tendency.There are different perspectives concerning whether the phenomena is related to the type of irrigation water.For this reason,I study the relationship between alkalinity and different type of irrigating alkaline water, and to completed the thesis about"Simulation Study on the Effect of soil Alkalinity by Different Type of Irrigation Water". Here are the place from which the water samples are taken in the experiment:Tuzuo county Shandai burgh Chaohao village Huang irrigation district;Tiemao village Xiaoxi village (80-90m deep groundwater);Sanliang-yongshun aqueduct's Xiaohei river.And the soil samples are taken from Inner Mongolia Agricultural University pedagogic farm. Take the method of putting soil in the column indoor, the results are as follows: after irrigated different type of alkaline water,soil alkalinity has different increase.After irrigating the Huang irrigation district and Xiaohei river,the alkalinity is increasing. Although it would lead to soil alkalized,it does not get the standard of alkaline soil.So the Huang irrigation water and Xiaohei river can be used in irrigation.After irrigated the deep groundwater three times,the alkalinity attain the level of alkaline-soil.But pH doesn't attain the level of alkaline-soil.This phenomenon maybe due to the quantity of the SO42- ion,the SO42- ion buffer powerful with the soil.Deep groundwater cannot be used in irrigation.Because it is not make the soil alkaline,but also turn the soil salined. |
