Yang Wen-Tao, Zhou Hang, Gu Jiao-Feng, Zeng Qing-Ru, Liao Bo-Han
College of Bioscience and Technology, Hunan Agricultural University, Changsha, 410128, China.
College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China.
Bull Environ Contam Toxicol. 2017 Nov;99(5):601-606. doi: 10.1007/s00128-017-2151-1. Epub 2017 Sep 9.
A soil spiking experiment at two Cd levels (0.72 and 5.20 mg kg) was conducted to investigate the effects of rapeseed cake (RSC) at application rates of 0%, 0.75%, 1.5%, and 3.0% (w/w) on iron plaque formation and Cd uptake by rice (Oryza sativa L.) seedlings. The use of RSC did result in a sharp decrease in soil bioavailability of Cd and a significant increase in rice growth, soil pH and organic matter. Application of RSC increased the amount of iron plaque formation and this effectively inhibited the uptake and translocation of Cd into the rice seedlings. RSC was an effective organic additive for increasing rice growth and reducing Cd uptake by rice plant, simultaneously. These results could be used as a reference for the safety use of Cd polluted paddy soil.
进行了一项在两种镉水平（0.72和5.20毫克/千克）下的土壤加标实验，以研究在0%、0.75%、1.5%和3.0%（w/w）施用量下菜籽饼（RSC）对水稻（Oryza sativa L.）幼苗铁膜形成和镉吸收的影响。使用RSC确实导致土壤中镉的生物有效性急剧下降，水稻生长、土壤pH值和有机质显著增加。施用RSC增加了铁膜形成量，这有效地抑制了镉向水稻幼苗中的吸收和转运。RSC是一种有效的有机添加剂，可同时促进水稻生长并减少水稻植株对镉的吸收。这些结果可为镉污染稻田土壤的安全利用提供参考。
