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滄州一些低洼盐碱地区,修筑土埂畦田,有蓄雨压盐作用。利用本区雨季集中的特点,围埝按納雨水,淋淡表土盐碱,能使土壤盐分逐年降低。在南皮县付庄强碱地上測定証明:同样降雨量,同样碱地,土埂畦田和无埂田,經过大雨(150毫米)淋洗,耕层盐分差异很大。例如土埂畦田0~5厘米土层盐分由1.375%降至0.173%,5~10厘米由0.503%降至0.21%,1米土层盐分含量都降到0.3%左右;而无埂田由于边降雨边形成逕流,下压淋洗作用較小,只表层0~5厘米含盐量由
Cangzhou some low-lying saline-alkali areas, the construction of soil 埂 畦 Tian, a pressure of salt rain effect. The use of the characteristics of the rainy season concentrated in the area, according to satisfied with the rain water, leaching of topsoil, soil salt can reduce year by year. In the Nanpi County Fuzhuang strong alkali on the ground to prove: the same rainfall, the same alkali, soil 埂 和 and 无 埂 Tian, after heavy rain (150 mm) leaching, plowing salt difference is very large. For example, soil salt content in 0-5cm soil layer decreased from 1.375% to 0.173%, from 5% to 10% to 0.21% from 0.503%, and salt content in 1m soil layer dropped to about 0.3% The formation of runoff rainfall, pressure leaching smaller, only the surface of 0 to 5 cm from the salt content