| Abstract: | Co-amino-oligosaccharide pathogenesis-resistance and product-increase reagent (CPPR), which contained amino-oligosaccharide isolated from marine crustacean with biochemical technique, can improve pathogenesis-resistance and product of the crops. Field experiment proved that the yield of wheat, maize and rice increased by 20.8%, 10.6% and 15.6% when treated with CPPR (soaking seeds or spraying). Crops, which treated with CPPR, the grains of per spike and the weight of thousand-seeds of wheat, maize and rice all increased. The content of chlorophyll and dry weight of rice which treated with soaking or spraying were higher than these of control, the leaf area of wheat which treated with CPPR (spraying) increased as well. |
