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苏北滨海盐土呈带状分布于江苏省长江以北东部沿海,总面积约二万平方公里.这个地区的特点是:地势低平,一般地面高程在1.5—3米之间,地下水位高,矿化度大,且流动缓慢,旱季地下水位在地面下1.5米,雨季均在1米以内,矿化度在1—10克/升以上;年平均气温在14.3—15.1℃,年降雨量800—1000毫米,大半集中在6—8月,全年蒸发量(指自由水面)约为降水量的1.4—1.5倍;土壤是黄淮冲积而成的滨海盐土,底土盐分重,以氯化钠为主,1米土体含盐量一般在0.3—0.5%之间,同时土壤含石灰也很多,一般为3—10%,加上细砂多,毛孔细,返盐速;其次是常年多风,特别是夏秋之交台风侵袭颇繁.这些多不利于粮棉作物的生长发育和盐土的脱盐改良,严重影响水区粮棉产量的提高.把这部分盐土改良好,本区粮棉产量将会大幅度的增加.
The coastal saline soil in northern Jiangsu was distributed along the coast of the eastern part of the north east of the Yangtze River in Jiangsu Province with a total area of about 20,000 square kilometers.The features of this area are: low terrain, general ground elevation of 1.5-3 meters, high groundwater level, The degree of mineralization is large and the flow is slow. The groundwater table in the dry season is 1.5 meters above the ground, the rainy season is within 1 meter and the salinity is above 1 to 10 grams / liter. The average annual temperature is 14.3-15.1 ℃ and annual rainfall is 800 -1000 mm, most concentrated in June-August, the annual evaporation (referring to the free surface) is about 1.4-1.5 times the precipitation; soil is the Yellow Sea and the Huaihe alluvial coastal saline, subsoil salt heavy, with sodium chloride Mainly, 1 m soil salt content is generally between 0.3-0.5%, while the soil is also a lot of lime, usually 3-10%, with fine sand, fine pores, salt return speed; followed by perennial The wind, especially the typhoon at the turn of summer and autumn, caused quite a few invasions, which were not conducive to the growth and development of grain and cotton crops and the desalination of salt soils, which seriously affected the yield increase of grain and cotton in the water area. Will increase dramatically.