|Author:||Liu, XiaoGang ; Zhang, FuCang ; Yang, QiLiang ; Tian,YuFeng|
|Book Group Author:||NA|
This pot experiment examines the effect of irrigation method on transport and utilization of water and nitrogen using three irrigation methods (conventional irrigation, alternate partial maize rootzone irrigation, fixed partial root-zone irrigation) and four levels of nitrogen. The influence of different irrigation methods on dynamics and utilization of water and nitrogen in rootzone soil was studied. Results showed that soil NO3--N content was positively correlated with the amount of nitrogen application, soil NO3--N content on both sides of the rootzone of alternative irrigation was evenly distributed, and the soil NO3--N accumulation in dry side was significantly greater than that in the wet side of fixed irrigation. The NO3--N residue in upper soil of alternative irrigation was approximately equal with that of conventional irrigation, while the residue in the lower soil of alternative irrigation was much more than that of the conventional irrigation. Maximum root/shoot ratio was recorded in the alternative irrigation while conventional irrigation was the least. Water use efficiency of alternative irrigation was 0.99-1.11 times of the conventional irrigation, the irrigation amount of alternative irrigation was 0.75 times of the conventional irrigation, thus water-conservation effects of alternative irrigation were evident. At the same level of nitrogen fertilizer, nitrogen absorption of per dry mass of alternate irrigation was maximum while that of conventional irrigation was at the minimum.
|Pages:||62 - 67|
|Journal:||Transactions of the Chinese Society of Agricultural Engineering|
application rates, irrigation, irrigation systems,irrigation water, maize, nitrate nitrogen, nitrogen, nitrogenfertilizers, nutrient content, pot experimentation, water useefficiency, Zea mays, Zea, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, corn, watering, FieldCrops (FF005) (New March 2000), Plant Production (FF100), Soil Chemistryand Mineralogy (JJ200), Soil Physics (JJ300), Soil Fertility (JJ600),Fertilizers and other Amendments (JJ700), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]