Abstract: ‘Longjiao 2 ’ is a new double-cropp -ing water bamboo ( Zizania latifolia Turcz) cultivar developed from the mutation lines of indigenous variety‘Suozijiao’. Zizania plant has strong growth vigor and tiller ability, compact plant type, middle tolerant fertility and high resistance. Zizania was harvested in fall. It has late maturity, it was also strong tolerant to low temperature. It has large individual, glossy surface, fine and tendermeat quality, good commercial appearance. Gross harvested weight of Zizania in fall is 129.0 -148.4 g per each, net weight is 89.1 - 101.2 g per each, the yield is 22 395 - 25 335 kg·hm- 2 and average yield is 23 340 kg·hm- 2. Gross weight of Zizania harvested in summer is 142.7 - 158.2 g per each, net weight is 105.3 - 113.3 g per each, the yield is 44 145 - 46 260 kg·hm- 2 and mean yield is 44 790 kg·hm- 2.

Key words: water bamboo, Zizania latifolia Turcz, cultivar