Effects of planting density on yield and components of hybrid mulberry

To explore the most suitable planting density for herbaceous cultivation and provide foundation for efficient herbaceous cultivation models, yields of branch and other parts of hybrid mulberry(Guiyou No.62) with different planting densities(45 000, 67 500, 90 000 and 112 500 plant·hm-2) were studied. The results showed that reasonable planting density affected the yield of mulberry remarkably. The highest yield was 61 672.50 kg·hm-2,which was observed in treatment with a planting density of 112 500 plant·hm-2, and significantly different from the other 3 treatments. So an appropriate planting density for herbaceous cultivation is 112 500 plant·hm-2. Branches per plant, stem diameter and leaf area trended to decrease with the increasing of planting density. Mulberry leaf yield is the most important part of yield components, and take up over 50% of total yield. With the increasing of planting density, proportion of each component has no significant change, and it is leafxylemphloem.