设为首页  |   加入收藏
引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 41次   下载 0  
分享到: 微信 更多
不同供硒水平对水稻硒的吸收和累积特性研究
晏娟,朱同贵,张忠平,樊建波
1.安徽光明槐祥工贸集团有限公司;2.安徽省合肥市巢湖市巢湖学院化学与材料工程学院,;3.安徽省合肥市巢湖市巢湖学院化学与材料工程学院;4.中国科学院南京土壤研究所
摘要:
以“南粳9108”为材料,在巢湖流域研究田间条件下不同供硒水平(0、20、40和60gSe/hm2)以及等量硒肥二次施用对水稻的产量和硒的吸收、累积、转运及分配的影响。结果表明:一次性施用不同浓度硒肥对水稻有增产作用,但是增产效果甚微;施用硒肥能够显著促进水稻茎、叶和穗的硒含量,但随着时间的推移,茎、叶和穗的含硒量均出现上升再下降趋势;稻谷、糙米及精米中的硒含量与硒肥施用量成显著的正相关性,硒肥处理平均硒含量依次为0.279 mg/kg,0.150 mg/kg,0.055 mg/kg,分别较对照不施硒肥高309%、142%和333%;地上部硒累积量与施硒水平呈极显著的正相关,随着施硒量的增加,尽管硒的表观利用率是增加的,硒转运系数和硒的收获指数显著下降。等量硒肥二次分施较一次性施用对产量有较为显著的促进作用,该处理下水稻产量较对照增加15%;等量硒肥二次施用增加了稻壳和米糠中的硒含量,精米中的硒没有增加;较一次施用,等量硒肥二次施用肥料表观利用率较高,硒肥的收获指数和转运系数显著下降,地上部累积更多的硒在稻草中。综上所述,外源硒的添加确实能增加大米硒含量,使其达到国家富硒大米硒含量标准范围内。但结果同时显示水稻中的硒相当大的一部分累积在谷壳、谷糠及稻草中,弃之可惜,可考虑充分利用。
关键词:  供硒水平  水稻  吸收  累积
DOI:
分类号:S511;S143.79
基金项目:安徽省高等学校省级自然科学研究项目(KJ2017A448)和2018年度安徽省博士后研究人员科研活动经费资助。
Effect of Selenium Supplying Levels on Selenium Absorption and Accumulation in Rice
yanjuan1,2,3,4,2,5, zhutonggui1,3, zhangzhongping4,5, fanjianbo6
1.Anhui Guangming Huaixiang industry &2.amp;3.Trade Group Co.,Ltd;4.School of Chemistry &5.Material Engineering, Chaohu University;6.Institute of Soil Science, Chinese Academy of Sciences
Abstract:
In this study, a feild experiment was conducted with“Nangjing9108”as test material to investigate the yield and selenium uptake, accumulation, translocation and distribution in rice under different selenium levels (0, 20, 40 and 60 gSe/hm2) and secondary application of equal amount of selenium fertilizer on Rice in Chaohu Lake Basin . Results showed that there was no significant yield increase in rice when applied different concentrations of selenium fertilize at one time. The selenium concentration in stems, leaves and panicles of rice were significantly promoted under different application of selenium fertilizer ,and the trends were upward and downward as time goes on . Selenium concentration in rice, brown rice and milled rice was positively correlated with selenium fertilizer application rate. And the average selenium concentration of rice, brown rice and milled rice treated with selenium fertilizer was 0.279 mg/kg, 0.150 mg/kg and 0.055 mg/kg, respectively, which was 309%, 142% and 333% higher than that of the control without selenium fertilizer. It is showed that the selenium accumulation in shoot was positively correlated with Se application level, andthe selenium transport coefficient and the selenium harvest index decreased significantly ,although the apparent utilization rate of selenium was increased with the increase of selenium application rate. The result also showed that secondary application of selenium fertilizer with the same amount had a more significant effect on promoting rice yield than one-time application, and the rice yield increased by 15% compared with the control under this treatment. Compared with one-time application,there was a increase of Selenium concentration in rice husk and rice bran , but not in milled rice under secondary application of the same amount of selenium fertilizer. And which the harvest index and transporting coefficient of selenium fertilizer decreased significantly with the higher apparent utilization rate of fertilizer. It indicated that more selenium accumulated in straw.In conclusion, there was indeed increase in the selenium concentration by applying the addition of exogenous selenium, in which the tice selenium concentration within the national selenium-rich rice selenium concentration standard. However, the results also showed that a considerable part of selenium in rice accumulated in hull, chaff and straw. It is a pity to abandon it and make full use of it.
Key words:  Selenium supplying levels  Rice  Absorption  Accumulation

您是第2907570位访问者
版权所有 © 《土壤》编辑部
本系统由北京勤云科技发展有限公司设计   京ICP备09084417号