微区改土微区改土是指进行局部土壤改良,小至一树穴、一花坛、一花池,大至一条绿化带,数亩、数十亩绿化地.通过隔盐层、隔盐袋、锯末等,改善徽区土壤理化指标,达到抑制局部返盐,使土壤脱盐,植物正常生长的目的.隔盐袋一般用0.2厘米厚的塑料薄膜,加工成长、宽、高各1米的袋,底部铺麦糠等隔盐层,上部放培养土.筛选造林树种河北盐碱地多轻壤或壤土,含 Micro-area soil improvement Micro-area soil improvement refers to the local soil improvement, as small as a tree hole, a flower bed, a flower pond, up to a green belt, mu, dozens of acres of green land. , Sawdust and so on, to improve the soil physical and chemical indicators of the emblem area, to inhibit the local return salt, so that the soil desalination, the purpose of normal plant growth.Septal salt bags are generally 0.2 cm thick plastic film, processing growth, width and height of 1 meter bag , The bottom of the shop bran and other salt layers, the upper part of the release of culture soil. Afforestation tree species of saline soil in Hebei more light soil or loam, with