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通过对试验地泥质盐化土进行穴状衬膜和配置客土基盘等措施的改造,并对含盐量不同的Ⅰ号、Ⅱ号、Ⅲ号台田穴内穴外水盐动态数据进行收集,研究减少大规模客土绿化,简单而又切实可行的盐碱地绿化种植模式。结果表明:Ⅰ号、Ⅱ号、Ⅲ号台田穴内含水率值及电导率值与穴外相比,穴内平均含水率值均高于穴外,且靠近苗木根系处20—40cm土层含水率值达到最大;穴内的平均电导率值均低于穴外,且在60—80cm土层由于石砾隔盐层的排盐阻盐作用电导率值最低。研究结果表明:穴状衬膜客土基盘能够有效地减少栽植穴内水分蒸发渗透和穴外土壤盐分的渗入,起到了保水阻盐的作用,为苗木生长提供了一个良好的局部土壤环境。因此,此造林模式可降低土壤含盐量,进而提高苗木的成活率和保存率,比单纯客土造林费用低,加之操作简单易于实现,具有广阔的推广前景。
Through the modification of the cave-shaped lining of the muddy saline soil and the installation of the soil-based substrate, the dynamic data of the external water salinity of points I, II and III with different salinities were carried out Collect and study ways to reduce the large-scale afforestation, simple and feasible planting mode of saline-alkali land. The results showed that the average water content in the holes of I, II and III was significantly higher than that of the points outside the hole, and the water content and conductivity of the holes were close to the water content in the 20-40 cm soil layer The maximum value of conductivity; the average conductivity of the hole is lower than the hole, and in the 60-80cm soil layer due to the salt out of the gravel salt resistance salt conductivity lowest. The results show that the pocketed film-based soil-base plate can effectively reduce the infiltration of water evaporation and soil salt infiltration in the planting hole, play a role of water retention and salt resistance, and provide a good local soil environment for seedling growth. Therefore, this mode of afforestation can reduce soil salinity, and thus improve the survival rate and preservation rate of seedlings, than the simple cost of afforestation, coupled with simple and easy to implement, has a broad promotion prospects.