关键词: 利用对策, 利用对策

Abstract: Drought was the main reason that caused low and unstable maize yields in northern China. In order to ensure high and stable maize yields, it is important to research and find the suitable maize varieties. This experiment selected the typical maize varieties in production, and under conditions of drought stress and normally watered soil in the heading stage, the different maize varieties yields and yields components and drought resistance were researched. The results showed that, under water stress in heading stage, the average small section yield of high density planting maize varieties was 12.14 kg, which was higher than that of the low density planting maize varieties (10.4 kg); the analysis of drought resistance index showed that, the highest variety was‘Dafeng26’(0.89), which belonged to high density planting varieties, and the lowest variety was ‘Nongda108’(0.39), which belonged to low density planting varieties. The combined analysis of yield components showed that the density of planting was the most important factor that affected yields, and the second was kernel number, and the third was hundred grains weight.‘Dafeng26’and‘Xianyu335’had high and stable yield in the experiment. Therefore, to select high density planting maize varieties and promote maize cultivation technology of increased density were the important ways to sustain maize production and ensure food security in future.