叶面阻控剂与土壤调理剂对稻米降镉效果研究

摘要

Using lime and soil conditioner, water soluble silicon as the material, rice cultivation experiment on cadmium (Cd) contaminated farmland was carried out. The results showed that the increase in soil pH value, can effectively change the existing forms of cadmium in soil and let it not easily absorb by plants, after applied lime, heavy metal cadmium content in rice and rice straw were decreased by 73.4% and 66%; the Cd could stay in the plant root, stem base by spraying the foliar resistance control agent, to prevent it from transferring to rice, the content of heavy metal cadmium in rice and rice straw was decreased by 41.5% and 25.3% respectively; after applied soil conditioner, the cadmium content in rice and rice straw was decreased by 71.3% and 69.3%.%以石灰、土壤调理剂、水溶硅肥为材料，在镉污染耕地上进行水稻种植试验。结果表明：通过提高土壤中 pH 值，可以有效地改变土壤中镉的存在形态，不易被植物吸收，施用石灰后稻米和稻草中重金属镉含量分别比对照降低了73.4%和66%；通过喷施叶面阻控剂，可以使镉停留在植物根、茎基部，阻止其向稻米中传送，喷施后稻米和稻草中重金属镉含量分别比对照降低了41.5%和25.3%；施用土壤调理剂后稻米和稻草中重金属镉含量分别比对照降低了71.3%和69.3%。