摘要
为探索稻米镉积累的土壤酸碱度稳定性,于2015~2016年通过土培盆栽试验在多点对13个早稻和14个晚稻镉低积累品种进行了6种不同酸碱度的土壤p H调控液处理。结果表明:p H值3.0~8.0的酸碱溶液的调控处理可以使土壤实际p H值大小保持在5.60~7.46之间(南方稻田土壤p H值范围主要在5.5~8.0之间),各水稻品种在此土壤p H范围内的米镉积累变异系数间的差别较大。13个早稻品种的CV值范围为36.36%~97.08%,其中以株两优15(36.36%,CV最小)和株两优211(40.66%)的米镉积累量受土壤p H值的影响相对较小,而湘早籼32号(97.08%)受影响相对较大;14个晚稻品种的CV则处于40.65%~98.91%之间,株两优336(40.65%)和金优284(47.73%)的米镉积累量受土壤p H值的影响相对较小,而湘晚籼12号(98.91%)和金优59(96.85%)受影响相对较大。同时,各早、晚稻品种的糙米镉含量均表现为:以p H值为5.0和6.0的溶液处理时的米镉积累量相对最高,p H值越向两极,米镉含量相对越低。
In order to research the stability of rice Cd accumulation under different soil pH status,the test with6different pH treatments to13early-rice and14late-rice cultivars was implemented from2015to2016at several sites through soil potted plan.The results showed that treated with aicd and lye solution with pH3.0-8.0can make the rice soil pH between5.60-7.46(most of rice soils in south-China have a pH of5.5-8.0).And under this soil pH sphere,the rice Cd accumulation variation coefficients(CVs)had a obvious variation among the cultivars.The CV value range of the13early rice was36.36%-97.08%,and among them,the rice Cd accumulation of Zhuliangyou15(CV=36.36%,the minimum)and Zhuliangyou211were weakly influenced by the soil pH,while the Xiangwanxian32(97.08%)was obviously impacted.At the same time,the CVs of the14late rice was40.65%-98.91%,and the soil pH weakly influencde CVs of Zhuliangyou336(40.65%)and Jinyou284(47.73%),but strongly influenced Xiangwanxian12(98.91%)and Jinyou59(96.85%).Moreover,the rice Cd content of early-rice and late-rice cultivars was almost the highest at the treated soil pH5.0and6.0respectively,and lower at the soil pH3.0or8.0.
作者
方宝华
戴力
方建林
曹清春
张玉烛
柏连阳
FANG Bao-hua;DAI Li;FANG Jian-lin;CAO Qing-chun;ZHANG Yu-zhu;BAI Lian-yang(Hunan Rice Research Institute, Changsha 410125, PRC;Xiangtan Agricultural Research Institute, Xiangtan 411134, PRC;Hengyang Agricultural Research Institute, Hengyang 421101, PRC;Hunan Hybrid Rice Research Center, Changsha 410125, PRC;Hunan Academy of Agricultural Sciences, Changsha 410125, PRC)
出处
《湖南农业科学》
2017年第12期66-70,共5页
Hunan Agricultural Sciences
基金
湖南省科技重大专项(2011FJ1002)
湖南省重金属污染耕地修复及农作物种植结构调整试点项目
关键词
水稻
镉积累稳定性
土壤酸碱度
变异系数
rice
stability of Cd accumulation
soil pH
variation coefficient