Effects of Different Irrigation Treatment on Morphological Indexes,Yield and Water Use Efficiency of Maize in Qianzhong Areas

Drought is the main influence factor which restricts high yield of maize.Taking the maize,which is cultivated in test-pit under the mobile rain-proof shelter,as test material,through setting different soil water content treatment,a systematic study on the influence of different soil water treatment on morphological indexes,yield and water use efficiency of maize during the growing period is conducted.The results indicate that water stress inhibits the growth and development of maize.The higher soil moisture treatment(T10) has a higher height and leaf area.Light stress has no obvious influence.As the stress aggravates,all of the morphological indexes show a downward trend.The ear length and ear diameter decrease with the reduction of soil moisture.The maize is very sensitive to water stress at tasseling-filling stage,in which drought will lead to the reduction of ear length,ear diameter and kernel weight,and the increase of bald,which will result in the significant decrease of the yield.