【作者】 廖育林； 罗琳； 陈煦； 范美蓉； 魏建宏；

【Author】 Liao Yu-lin~(1,2),Luo Lin~2,Chen Xu~3,Fan Mei-rong~(2,4),Wei Jian-hong~5 (1.Soil and Fertilizer Institute of Hunan Academy of Agricultrual Sciences,Changsha 410125,China; 2.College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China; 3.Rice Research Institute of Hunan Academy of Agricultrual Sciences,Changsha 410125,China; 4.Changsha Environmental Protection College,Changsha 410004,China; 5.College of Bioscience and Technology,Hunan Agricultural University,Changsha 410128,China)

【机构】 湖南省农业科学院土壤肥料研究所； 湖南农业大学资源与环境学院； 湖南省农业科学院水稻研究所； 长沙环境保护职业技术学院； 湖南农业大学生物科学技术学院；

【摘要】 采用田间试验,研究了镉污染稻田土壤上赤泥与猪粪配施对水稻生长、水稻生理特性和镉吸收效果的影响。结果表明,稻谷产量在一定赤泥/猪粪比施用量范围内增加,但超过一定施用量后反而有所下降。早、晚稻水稻株高、有效穗、结实率和千粒重的变化趋势与稻谷产量的变化趋势基本一致;随着赤泥/猪粪比的增加,早、晚稻土壤有效态Cd含量逐渐降低。赤泥与猪粪配施可维持叶片中超氧化物岐化酶(SOD)和过氧化物酶(POD)的较高生理活性,降低丙二醛(MDA)在叶片中的积累,改善细胞内活性氧产生与清除之间的平衡关系。随着赤泥/猪粪比的增大,水稻糙米中镉含量逐渐减少。赤泥与猪粪配施对重金属Cd污染土壤的改良效应,存在一个最适配比(早稻,1.125;晚稻,0.625)的问题,并不是越多越好。更多还原

【Abstract】 Field plot experiments were carried out to investigate the effects of red mud combined with pig manure on growth and physiological characteristics of rice plant and uptake of Cd in Cd-contaminated paddy soil.The results showed that grain yield increased within a range of red mud and pig manure ratio,but the yield decreased when beyond the upper limit amount of red mud.The changing trend of plant height,effective panicle,filled grain percent and 1000-grain weight is almost the same as the trend of grain yield in early rice and late rice.With red mud and pig manure ratio increases,soil available Cd content decreased gradually in early rice and late rice.The red mud-pig manure mixer can maintain higher physiological activity of superoxide dismutase(SOD) and peroxidase(POD) in blades,decreased the accumulation malondialdehyde(MDA) in leaves,and improved the balance relationship between generation and the clearance of intracellular reactive oxygen.With the red mud to pig manure ratio increases,the contents of cadmium in brown rice decreased gradually.The effect of red mud and pig manure on improvement of Cd-contaminated soil exists an optimal ratio(early rice,1.125;late rice,0.625), rather than the more the better.更多还原