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德州市地处鲁北平原的温暖带半湿润季风气候区,年降水量590.1毫米,年蒸发量2046毫米,比降水量大两倍多,市区地势低洼,排水不畅,地下水位高,潜水埋深一般在1～1.5米,潜水矿化度每升为2.0～3.4克,土壤含盐量0.3～0.8％(0～50厘米)pH值7.8～8.5,土壤中的阳离于以钠、钙、镁为主。是以氯化物——硫酸盐为主的盐化土壤。在这样的土地条件下,树木长势差,未老先衰,枯枝败顶现象严重,正如顺口溜所说“一年青,二年黄,三年就死亡”。历年来植树成活率在50％左右。盐碱土改良的难度如同医学上的癌症一
Dezhou is located in the temperate semi-humid monsoon climate zone of Lubei Plain with an annual rainfall of 590.1 mm and an annual evaporation of 2046 mm, which is more than twice as much as that of precipitation. The urban area is characterized by low lying, poor drainage, high underground water level, Deep in the general 1 to 1.5 meters, diving salinity of 2.0 to 3.4 grams per liter, soil salt content of 0.3 to 0.8% (0 to 50 cm) pH value of 7.8 to 8.5, the cation in the soil to sodium, calcium , Mainly magnesium. Chloride - sulfate-based salinized soil. Under such land conditions, trees grow worse, they do not get old, and the phenomenon of dead branches is extremely serious. Just as Jingle said “one young, two yellow, three years dead.” Survival rate of planting trees over the years at about 50%. Saline-alkali soil as difficult to improve the medical one of the cancer