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我国在1.3亿hm~2的耕地中,盐碱地占7%左右。在盐碱地上作物出苗比较困难,而冲洗可以降低土壤耕层的土壤盐分含量,以保证作物出苗。丁村试区位于古阳堤下,西孟姜女河以北,属于古黄河槽状背河洼地,地下水出流条件较差,土壤含盐量高,地下水矿化度高,是有名的老盐碱地。土壤盐分组成以硫酸盐为主,氯化物次之,属氯化物硫酸盐重盐碱土。治理前,地表常有1～2cm厚
In 130 million hm2 of arable land in our country, saline-alkali land accounts for about 7%. Emergence of crops on saline-alkali soil is more difficult, and flushing can reduce soil salt content in soil soils to ensure crop emergence. Dingcun experimental area is located under the ancient embankment, north of the West Meng Jiang River, belongs to the ancient Yellow River fluvial depression, groundwater outflow conditions are poor, high salinity of soil, groundwater salinity is high, is famous for the old saline land. The composition of soil salt is mainly sulfate, followed by chloride, which belongs to chloride and sulphate heavy saline soil. Before treatment, the surface often 1 ~ 2cm thick