惠民、昌潍地区的一些城镇位于渤海沿岸,由于地下水位高,一般仅在1—1.5米,地下水矿化度很高,一般为50克/升以上。栽树大部在冬春两季,干旱、少雨,蒸发量大,土壤的盐分不断上升。夏季雨水虽能冲洗盐分,但由于城镇的地面扳结,雨水很难透入土壤深层,大都变为迳流,所以盐分得不到冲洗,却逐年坛加。一般都超过0.4％,大多数树种都难以适应。植树造林美化环境困难很大,现存树木生长不良,处于枯萎状态。为加速城镇绿化,我们采用栽树复砂的办法,来提高造成活率,效果明显,首先通过人工浇 Some towns in Huimin and Changwei areas are located along the coast of the Bohai Sea. Due to the high groundwater level, they are generally only 1-1.5 meters high with high salinity of groundwater, usually above 50 g / l. Most of the trees are planted in winter and spring, drought, less rain, evaporation, soil salt rising. Although summer rainfall can wash salt, but due to the town pull the end of the junction, the rain is difficult to penetrate into the soil, most of them into a stream, so the salt can not be washed, but the altar every year. Generally more than 0.4%, most species are difficult to adapt. Afforestation Afforestation environment is very difficult, the existing poor growth of trees, in a wilted state. In order to speed up the urban greening, we use the method of planting trees and sand to improve the living rate, the effect is obvious. Firstly,