施硒形态对水稻不同叶位叶片吸收积累特征的影响  

Effects of selenium forms on the absorption and accumulation characteristics of rice leaves at different positions

作　　者：施柳 郑冬梅 李晓军[3] 蔺昕[1,2] 孙静静 曹丽霞[3] SHI Liu;ZHENG Dongmei;LI Xiaojun;LIN Xin;SUN Jingjing;CAO Lixia(Environmental College,Shenyang University,Shenyang 110044,China;Key Laboratory of Regional Environment and Eco-remedi-ation,Ministry of Education,Shenyang University,Shenyang 110044,China;Key Laboratory of Pollution Ecology and Environmental Engineering,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳大学环境学院,沈阳110044 [2]沈阳大学区域污染环境生态修复教育部重点实验室,沈阳110044 [3]中国科学院沈阳应用生态研究所,中国科学院污染生态与环境工程重点实验室,沈阳110016

出　　处：《生态学杂志》2023年第3期662-667,共6页Chinese Journal of Ecology

基　　金：黑土地保护与利用科技创新工程专项(XDA28090300);国家自然科学基金面上项目(41571085);农牧交错带功能农业关键技术研发院士专家工作站开放课题(20190001)资助。

摘　　要：为明确叶面施用的硒进入作物体内后的再分配特征,更好地服务于硒肥配方和喷施制度的优化,并筛选出适宜的叶施硒形态,本研究采用水培法探讨了叶面喷施4种形态硒对“稻花香2号”水稻苗期不同叶片、茎和根中硒吸收、积累特征的影响。结果表明:(1)叶施外源硒在水稻不同叶位叶片的分配规律为施硒叶(第4叶)硒含量最高,沿上位和下位叶逐步降低,且有机硒更倾向于向嫩叶运输;(2)叶施亚硒酸钠可使苗期水稻硒积累显著高于硒酸钠、亚硒酸锌和硒代蛋氨酸处理。相比对照,亚硒酸钠处理使水稻施硒叶硒含量上升131.4倍,达129.21 mg·kg^(-1),茎和根系中硒含量分别为对照的18.6倍和2.2倍。因此,苗期水稻施硒叶片中的硒向上位叶和下位叶均有转运,且大量积累在施硒叶下位第一叶,亚硒酸钠在目标水稻体内积累效果最好。To better serve the optimization of selenium fertilizer formulation and spraying system,we should clarify the redistribution of selenium applied on leaves after entering into crops and screen out the appropriate selenium form for foliar spraying.We examined the effects of foliar spraying of four forms of selenium on selenium absorption and accumulation in different leaves,stems and roots of rice“Daohuaxiang 2”by hydroponic method at seedling stage.The results showed that the distribution of exogenous selenium in leaves was related with different positions.The selenium concentration in the sprayed leaves(the 4th leaf)was the highest,and decreased gradually along the upper and lower leaves.The organic selenium tended to be transported to young leaves.Foliar spraying of sodium selenite significantly increased selenium accumulation in rice seedlings compared with sodium selenate,zinc selenite and selenomethionine treatments.Selenium concentration in leaves under the treatment of spraying sodium selenite increased by 131.4 times,up to 129.21 mg·kg^(-1),and that in the stems and roots was 18.6 times and 2.2 times higher than that in the control,respectively.Therefore,selenium in sprayed leaves at the seedling stage could be transported to upper and lower leaves.A large amount of selenium was accumulated in the lower first leaves of selenium-sprayed leaves.Sodium selenite had the best effect on selenium accumulation in rice.

关 键 词：叶面喷硒 叶位 亚硒酸钠 硒形态 转运系数 

分 类 号：S511[农业科学—作物学]