摘要
采用不同形态氮素营养液的培养方法，研究不同形态氮素对水稻体内镉存在形态的影响。结果表明，两种不同形态氮素即NHN，NO－N营养液培养中，NH-N促进水稻对镉的吸收，并增加了水稻根中和地上部的水提取态和氯化钠提取态镉的含量；而NO－N处理却增加了醋酸提取态镉含量。盐酸提取态和残留态的镉两处理差异不明显。
In order to understand the effect of the different forms of nitrogen on Cd content and its chemical forms in rice, nutrient solution culture method was used and the rice was grown in complete nutrient solution with ammonium or nitrate as the nitrogen form.The result indicated that the roots and shoots of rice grown in NH4-N had higher Cd content compared with NO3-N one. The concentration of H2O-extractable Cd and NaCl-extractable Cd content of rice grown in NH4-N solution were significantly higher than those in NO3-N solution, but the concentration of HAc-extractable Cd content was higher in NO3-N. HCl-extractable and residual Cd content were insignificantly different in both nutrition.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
1998年第5期90-94,共5页
Journal of China Agricultural University
关键词
镉形态
氮素
水稻
chemical forms of Cd
forms of nitrogen
rice
