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以FeSO4和EDTA二钠亚铁(EDTA.Na2Fe,也称EDTA二钠铁)为铁肥,通过土施和叶片喷施研究不同形态铁肥及施肥方式对水稻(Oryza SativaL.)镉积累的影响.结果显示不论施用何种形态铁肥或何种施用方式对水稻生长和产量性状均没有不利影响.土施EDTA.Na2Fe显著降低了水稻根系、地上部以及稻米(糙米和精米)中的镉含量,并且两基因型水稻精米中的镉含量远低于0.2mg/kg,达到国家限制标准.但土施FeSO4、叶面喷施FeSO4及叶面喷施EDTA.Na2Fe处理均显著增加了根系、地上部及稻米(糙米和精米)中的镉含量.结果还显示施用铁肥可显著提高稻米的铁、铜、锰含量,同时对锌含量也有影响.研究结果认为土施EDTA.Na2Fe等络合态亚铁肥,维持土壤中较高的有效态铁含量以及亚铁含量是控制稻米镉积累的一条新型可行途径.
FeSO4 and EDTA disodium ferrous (EDTA.Na2Fe, also known as EDTA disodium iron) as iron fertilizer, the effects of different forms of iron fertilizer and fertilization on the accumulation of cadmium in rice (Oryza sativa L.) were studied by soil application and leaf spraying The results showed that no matter what type of iron fertilizer was applied or what type of application had no adverse effect on rice growth and yield traits, soil EDTA-Na2Fe significantly reduced the cadmium content in rice roots, shoots and rice (brown rice and polished rice) , And the content of cadmium in polished rice of two genotypes was much lower than 0.2mg / kg, reaching the national limit, but FeSO4, foliar application of FeSO4 and foliar spraying of EDTA.Na2Fe significantly increased the root system, And rice (brown rice and polished rice). The results also showed that the application of iron fertilizer can significantly increase iron, copper and manganese content of rice, but also affect the zinc content.It is concluded that the soil EDTA-Na2Fe complex state Ferrous fertilizer, to maintain a higher effective soil iron content and ferrous content is a new viable way to control the accumulation of cadmium in rice.