Effects Of Nitrogen Application And Harvest Methods On Seed Yield And Quality Of Cleistengenes Songorica

Seed production is the foundation of forage production. This study determined the effect of nitrogen level and nitrogen application time on seed yield, yield components and seed quality of Cleistengenes songorica; effect of different harvest methods on seed yield and quality of C. songorica in order to provide technical guidance and data support for large-scale production of C. songorica. The results showed that:1. Seed yield of C.songorica was improved significantly by the application of N (P<0.05). The first year after planting, maximum seed yield was harvested at application N 100 kg·hm-2, reaching 1260.74 kg·hm-2; The second year after planting, highest seed yield got at application N 75 kg·hm-2in the spring and 75 kg·hm-2in the autumn was 1342.17 kg·hm-2, and compared with the control, the germination rate increased by 32.5 percent, seed vigor index increased by 11.5.2. Nitrogen treatment significantly increased the number of fertile tillers per unit area and Seeds per spikelet, the number of fertile tillers per unit area was the most important for seed yield in all the components.3. Among all harvest methods, grinded 20 minutes with 50 kg roller was best, compared with manual threshing, seed harvest rate was 93.7 percent, while significantly saving the harvest time, and had no significant effect on seed quality.