Abstract:

To make full use of dryland maize potential productivity and find suitable key cultivated measures of maize high yield in this area, the experiment was conducted in a split-plot treatment arrangement to explore the influence of different varieties and densities on growth and yield of maize in dryland. The results showed that economic yield, biomass yield and harvest index of compact-planting and close density tolerant maize ‘Zhengdan958’ was respectively higher 15.1%, 7.8% and 6.8% than that of rare-planting and large-size spike maize ‘Yongfeng1’ significantly. Economic yield and biomass yield increased while density increased. While densities of ‘Zhengdan958’ was 72000 plants per hm2 and densities of ‘Yongfeng1’ was 48000 plants per hm2, maize could keep lower biomass yield and higher economic yield, as well as could achieve harmonious relationships between leaf source and grain sink.