富硒、高镉地质背景下水稻种植实验研究

Rice planting experiment under Se-rich and Cd-high geological background

富硒(Se)的土地常常富镉(Cd),如何从该类土地中过滤掉Cd而安全地利用Se是农业生产的关键。本文以水稻种植为切入点,选取了7种水稻品种,以硅肥调节和农家常规种植方式作为对照进行了实验田与对照田实验。实验结果发现:(1)硅肥具有通过调节土壤理化性质、促进Se和Cd有效态的释放以及通过与Cd^(2+)反应降低Cd有效态的双重效果,使水稻更有利于富集Se而不富集Cd^(2+)(2)"深两优5814"和"C两优华占"水稻品种,在富集Se和抑制Cd方面的效果上较好。

To make full use of the results of Se-rich soil found in agro-geological survey and develop the safe utilization of Se-rich land in Se-rich and high Cadmium(Cd) areas, 7 rice varieties, silicon fertilizer regulation and conventional farming methods have been select as the control parameters by setting up the test field and the control field. The results show that:(1) The Silicon fertilizer has dual effects on promoting the release of available states of Se and Cd by regulating soil physical and chemical properties and on reducing available states of Cd by reacting with Cd^(2+), making rice more conducive to the enrichment of Se but less conducive to the enrichment of Cd.(2) The rice kinds of "Shenliangyou 5814" and "C liangyou huazhan" have better effects on enrichment of Se and on inhibition of enrichment of Cd.