关键词: 外界干扰指数, 外界干扰指数

Abstract:

The objectives of this study were to investigate the influences of row-spacing on maize yield under three planting densities, and also to seek new ways to increase density by changing cropping pattern. Field experiments were conducted in 2008 to study the regulatory effect of five different allocations of row-spacing on grain yield under three planting densities. Experimental design was Split Plot Design with main treatments of density and vice treatments of different spacing configurations. Test variety was provided ‘Nongda 108’. The results showed that the yield increased as the density increasing. The most obvious interaction effect occurred between density and row-spacing in 52500 plants/hm2. In this experiment, the cultivation of high yield model was 52500 plants/hm2 density with 0.60 m equal planting spacing, compared with traditional cultivation method, the yield increase rate was 23.27%. Reasonable allocations of row-spacing could increase planting density and finally increase the maize grain yield.