铜胁迫下氮肥对水稻幼苗生长的影响  

Regulation Effects of Nitrogenous Fertilizers on Rice's Growth under Cu^(2+) Stress

作　　者：邵登辉[1] 储玲[1] 

机构地区：[1]安徽师范大学生命科学学院重要生物资源保护与利用研究安徽省重点实验室生物环境与生态安全安徽省高校省级重点实验室,安徽芜湖241000

出　　处：《南京晓庄学院学报》2008年第3期59-63,共5页Journal of Nanjing Xiaozhuang University

基　　金：国家重点基础研究发展规划项目(2004CB418503);国家自然科学基金项目(30470270);国家人事部留学回国人员科研择优资助计划项目;安徽省教育厅自然科学基金资助项目(2008KjB219)

摘　　要：为了解氮肥对铜胁迫下水稻种子萌发及幼苗生长的影响,通过不同浓度Cu2+对水稻种子的浸泡,研究了Cu2+对水稻幼苗的根长、淀粉酶活性、脯氨酸和叶绿素含量的影响.结果表明,当Cu2+浓度≤50 mg/L时,施氮肥可促进水稻幼苗根系的活性,增强淀粉酶的活性,促进水稻种子的萌发和幼苗的生长;当Cu2+浓度≥50 mg/L时,施氮肥降低了水稻根系的活性,降低了水稻淀粉酶的活性,并且水稻种子的萌发和幼苗生长也受到抑制.因此根据土壤中Cu2+的浓度,适当地施加氮肥,可以减轻重金属铜的毒害,达到农作物幼苗长势良好、增产的目的.The effects of Cu^2＋ on root length, amylase activity, proline and chlorophyll in the leaves of rice are studied by seeds soaking experiments, with a view to finding out the regulating effects of nitrogenous fertilizers on rice growth under Cu stress. The results have shown that when the concentration of Cu^2＋ is ≤50mg/L, the activity of root and amylase is improved, and the germination of rice seeds and seedling growth are increased; when the concentration of Cu^2＋ is ≥ 50mg/L, the activity of root and amylase is reduced, and the germination of rice seeds and seedling growth are inhabited. So according to the concentration of Cu^2＋ in the soil, a suitable amount of nitrogen can be exerted so as to reduce copper poisoning, making the seedling grow healthily and increasing production.

关 键 词：水稻 CU^2+ N肥 淀粉酶 叶绿素 

分 类 号：S511[农业科学—作物学]