Influence of Drip Irrigation Quota on Film Maize Growth,Yield and Water use Efficiency

To explore suitable drip irrigation quota of corn in Chifeng area and water saving effect,a field test was conducted in the demonstration base in Nanpingfang village,Dangpudi town,Songshan District,Chifeng city.The test set up four levels of irrigation water,namely 180(GGDE1),240(GGDE2),300(GGDE3)and 360(GGDE4)m3/hm2.The influence of different drip irrigation quota on the growth condition of corn,corn yield and water use efficiency(WUE)was studied.The relation between water consumption and maize yield,marginal yield and water use efficiency was analyzed.The results showed that under the irrigation quota of300m3/hm2,corn plant height and leaf area showed better than other irrigation treatment in the corn seedling stage and filling stage;for the treatment of drip irrigation under film,corn yield increased with the increase of irrigation water first and then decrease;the yield components,such as spike weight,row grains,increased with the increase of irrigation quota;the regularity of spike length and spike rows was not strong;the differences between different treatments was not significant;both maize yield and water use efficiency had a quadratic parabola relationship with maize water consumption;water consumption in the whole stages of 400.83~449.63 mm was the main research area to determine the drip irrigation quota.