Effects of Different Irrigation Methods on Soil Nutrients and Distribution in Arid Land
In order to study the effects of different irrigation methods on soil nutrients and distribution in arid areas,three irrigation methods were set up,namely,under film drip irrigation(T1),open field drip irrigation(T2)and mulched furrow irrigation(T3),with no irrigation as the control(CK).The change characteristics of organic matter,alkali-hydrolyzed nitrogen,available phosphorus and available potassium in different soil layers were studied.The results showed that soil nutrients decreased gradually with the increase of soil depth.The contents of organic matter in all treatments were lower than that in the control,and the contents of alkali-hydro-lyzed nitrogen,available phosphorus and available potassium were higher than that in the control,and the soil nutrients under drip ir-rigation were the highest.Therefore,submembrane drip irrigation can be used to improve soil nutrients in arid areas.
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