• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Effect of cadmium on soybean (Glycine max L) growth and nitrogen fixation
【24h】

Effect of cadmium on soybean (Glycine max L) growth and nitrogen fixation

机译：镉对大豆生长的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To?study?the effect of cadmium (Cd) on soybean growth and nitrogen (N2) fixation, an experiment was performed in sand culture using Hoagland nutrient solution. At the time of sowing, different cadmium level that is 0, 4, 8 and 16 mg kg-1?sand was created using Cd (NO3)2. Soybean shoots and root lengths shoot and root biomass, nodule density and Cd uptake was recorded on 2, 4, 6, 8, 10, and 12 weeks after the emergence. To calculate the relative abundance of ureide and % Pfix?(proportion of plant N derived from N2-fixation), xylem sap was collected and analyzed for ureide, nitrate and amino-N at pod fill stage. The application of Cd adversely affected soybean growth, nodulation and N2?fixation as a function of time and increase in Cd concentration. Maximum reduction in the root and shoot length was found with higher Cd level that is 16 mg kg-1?sand after 10 weeks of the growth. Similarly, nodulation and the proportion of plant N (% Pfix) derived from N2?fixation decreased sharply as Cd concentrations increased during the whole growth stages and the maximum reduction was observed in the Cd level of 16 mg kg-1?sand followed by 8 and 4 mg kg-1?sand, respectively. Cadmium uptake increased with the highest Cd application after each bi-weekly harvest of growth.?Keywords:?Cd, growth, nodulation, N2?fixation, soybean.
机译：为了研究镉（Cd）对大豆生长和固氮（N2）的影响，使用Hoagland营养液在砂培养中进行了一项实验。播种时，使用Cd（NO3）2产生了0、4、8和16 mg kg-1？s的不同镉含量。出苗后的第2、4、6、8、10和12周记录了大豆芽和根长，芽和根的生物量，根瘤密度和Cd吸收。为了计算尿素的相对丰度和％Pfix？（源自N2-固定的植物氮的比例），收集木质部树液并在荚果灌装阶段分析尿素，硝酸盐和氨基-N。 Cd的施用对大豆的生长，结瘤和N2固定的影响是时间和Cd浓度增加的函数。在生长10周后，较高的Cd水平为16 mg kg-1？s，发现根和茎长的最大减少。同样，在整个生长期，随着Cd浓度的增加，结瘤和源自N2固着的植物N的比例（％Pfix）急剧降低，在16 mg kg-1？s的Cd水平下最大的降低是随后的8和4 mg kg-1？沙。每两周一次的生长收获后，镉的吸收量随镉的施用量增加而增加。关键词：镉，生长，结瘤，固氮，大豆。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号