A New Double-cropping Water Bamboo Cultivar‘Longjiao 2’ Effects of Adding Lactic Acid Bacteria and Cellulase on the Silage Quality of Water Bamboo Leaves Changes of Endogenous Hormone Contents of Different Partsduring Development of Water Bamboo(Zizania latifolia) A STUDY ON CLASSIFICATION AND BREEDING OF DOUBLE HARVESTING WATER BAMBOO (ZIZANIA CADUCIFLORA HAND.-MAZZ.