順昌县沙墩大队共有山壠冷浸烂泥类型的低产稻田563亩,占稻田总面积的50%强,包括烂泥田、冷水田、銹水田和冷黃泥田四个土組六个土种。这些稻田,地处山間狹谷,环境蔭蔽,日照短,有“山高水冷云雾重,半天阴雾半天晴”之称。加之冷泉漫流串灌,田間終年漬水,水、土溫度低,因而形成了土壤的“冷、烂、酸、毒、瘠”等不良 Shadun Township, Shunchang County, has a total of 563 mu of low-yielding paddy with cold-sump type, accounting for 50% of the total paddy field area, including six soil types of four soil groups, namely muddy soil, cold paddy field, rusty paddy field and cold yellow muddy soil. These paddy fields, located in the mountain valley, the environment shaded, short sunshine, “mountain water and heavy fog, half-day fog half-day sunny ” said. Coupled with the cold spring flow series, the field throughout the year waterlogging, water, soil temperature is low, thus forming the soil “cold, rotten, acid, poison, barren ”