Abstract: Ten of current spread hybrids of maize in China were used as experimental materials.The drought coefficient for yield and yield components, water use efficiency for economic yield and accumulate temperature were analysed by using control equipment of water resources in field.The results obtained from the detection of the drought-resistance were as follows.1. The responses of the different maize hybrids to drought were difference. According to the observations, the experimental materials can be divide into two groups, i. e. non-sensitive group and sensitive group to drought. The representative cultivars of non-sensitive group are Yichang 101, Yedan 4 and Nongda 60. Their drought coefficients of yield are 2. 3%, 8. 7% and 14. 5%,respectively. The representative cultivars of sensitive group are Zhongdan 120 and Jingdan 841.Their drought coefficients of yield are 20. 7% and 25. 4 %, respectively.2. The water use efficiency for economic yield of the maize hybrids (grain kg/t water) has a greater difference from each other. The water use efficiency of the non-sensitive group is 29. 5-58. 3% higher than that of the sensitive group. 3. In summary, the drought-resistant hybrids of maize are recommended to extend planting areas. These maize hybrids are Yichang 101, Yedan 4 and Nongda 60.

Key words: Maize hybrid, Drought-resistance, Drought coefficient, Water use efficiency for economic yield

CLC Number: 

• S513.01