The crop growth was affected more greatly by the coal fly ash,since its physical characteristics was not suitable for planting,it was unadvisable to plant crops directly on the coal fly ash.

• 结果表明:(1)粉煤灰物理性质不适于作物生长,对作物长势影响最大,在粉煤灰排放场不覆土直接种植作物不可取;