稻虾共生系统低镉积累水稻品种选择

该文选择江西省湖滨地区稻虾轮作田块，对11种适合稻虾共生的水稻品种进行了筛选.研究结果表明：11种水稻品种稻米Cd含量均未超过国家粮食安全食用标准，其中，野香优莉丝稻米的Cd含量最低.按照稻米对重金属Cd的累积能力差异将不同水稻品种分成3类：Ⅰ类水稻(稻米对Cd累积相对较低的水稻品种)有野香优莉丝、华晶；Ⅱ类水稻(稻米对Cd累积相对中等的水稻品种)有丰山丝苗、美香占、黄华占、靓占、野香优明月丝苗、鄂丰丝苗、两优336、野香优巴丝；Ⅲ类水稻(稻米对Cd累积相对较高的水稻品种)有农香42.在试验中，在水稻成熟期，野香优莉丝、丰山丝苗、靓占3种品种出现倒伏.综合考虑产量、水稻Cd积累和抗倒伏能力，推荐野香优明月丝苗、两优336、美香占、黄华占、鄂丰丝苗为南方地区稻虾共生适宜栽种的水稻品种；野香优莉丝、丰山丝苗和靓占3种水稻品种因其产量高、Cd低积累，可考虑在南方丘陵地区风较小的稻虾田中种植.

The Selection of Rice Varieties with Low Cadmium Accumulation in Rice-Crayfish Symbiotic System

Eleven rice varieties suitable for rice-crayfish symbiosis system are screened in rice-crayfish rotation fields in lakeside area of Jiangxi province.The results show that the cadmium content in rice of eleven rice varieties doesn't exceed the national food safety standards.Among them,the content of Cd in Yexiangyoulisi rice is the lowest.Different rice varieties can be divided into three categories according to their accumulation capacity of heavy metal cadmium.Type Ⅰ that accumulates cadmium relatively low includes Yexiangyoulisi and Huajing.Type Ⅱ that accumulates cadmium moderately includes Fengshansimiao,Meixiangzhan,Huanghuazhan,Liangzhan,Yexiangyoumingyuesimiao,Efengsimiao,Liangyou336 and Yexiangyoubasi.Type Ⅲ that accumulates cadmium high among 11 tested rice varieties includes Nongxiang 42 only.But during the ripening stage,Yexiangyoulisi,Fengshansimiao and Liangzhan occurr lodging.Considering yield,cadmium accumulation and lodging resistance capability of rice,it is recommended that Yexiangyoumingyuesimiao,Liangyou336,Meixiangzhan,Huanghuazhan and Efengsimiao are the most suitable varieties for planting in the rice-crayfish symbiosis fields in southern China.However,the three rice varieties of Yexiangyoulisi,Fengshansimiao and Liangzhan can be planted in rice-crayfish fields in hilly with low wind area in the South because of their high yield and low accumulation.