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将粉煤灰和污泥(基质1)、粉煤灰和酒糟(基质2)均按照4:1的质量比配制,由于2种基质中重金属镉含量较高,为研究基质中可食用作物的种植,选取绿豆、大豆、马铃薯在组配基质中进行试验。结果表明,基质1在第1季不适合种植绿豆、大豆和马铃薯;绿豆在基质2中不能正常生长,大豆产量也较低,但马铃薯生长良好。同时,马铃薯食用部分中重金属镉含量不超标,保证了富镉基质中马铃薯的食品安全,而且马铃薯秸秆中镉含量也未超出一般食用蔬菜标准,不会对环境造成污染。马铃薯秸秆生物量大,吸收镉较多,能起到植物修复作用。研究表明,基质2适宜在废弃地大面积复垦与推广应用。
Fly ash and sludge (matrix 1), fly ash and distiller’s grains (matrix 2) were formulated in a mass ratio of 4: 1. Due to the high content of heavy metal cadmium in the two matrices, Planting, selection of mung bean, soybean, potato in the matrix with the test. The results showed that substrate 1 was not suitable for planting mung bean, soybean and potato in the first season. Mung bean did not grow normally in substrate 2, and the yield of soybean was low, but the potato grew well. At the same time, the content of heavy metal cadmium in the edible part of the potato is not exceeded, which ensures the food safety of the potato in the cadmium-rich matrix, and the cadmium content in the potato straw does not exceed the standard of general edible vegetables so that the environment will not be polluted. Potato straw biomass, absorb more cadmium, can play a role in phytoremediation. Research shows that matrix 2 is suitable for reclamation and popularization and application in a large area.