Effect of Water and Nitrogen Interaction on Maize-Soybean Strip Intercropping Planting Yields and Water-Nitrogen Use Efficiency in Hexi Oasis Irrigation Area
Using maize Longdan 6 as the research subject,field experiments were conducted employing a two-factor interaction design of irrigation and nitrogen application.According to the actual evapotranspiration(ETc)of the farmland,three irrigation levels were set up:80％ETc,100％ETc,120％ETc(W1,W2,W3),and four levels of nitrogen application were set up for each irrigation level:0,230,340,450 kg/ha(N0,N1,N2,N3).The photosynthet-ic physiological indices were measured at each maize growth stage,the yield and grain quality were measured after harvest,and water and nitrogen use efficiency were calculated.The results showed that under the same nitrogen ap-plication level or irrigation level,the net photosynthetic rate,transpiration rate,and stomatal conductance of maize increased with the increase of nitrogen application amount or irrigation amount.The suitable water and nitrogen ra-tio can improve the maize quality,increase yield and water-nitrogen use efficiency of maize,the principal compo-nent analysis method was used for evaluation,which indicated that the N3W3 treatment had the best comprehensive effect,that is the optimal irrigation quota of maize was 428.60-493.33 mm and the nitrogen application amount was 450 kg/ha.
MaizeWater-nitrogen interactionStrip intercropping plantingWater-nitrogen use efficiency
万方数据
维普
