脱硫废弃物改良盐碱湖土种植乔灌木技术集成试验

The Test of Coal-firing Desulphurization Waste Improve Soil of Alkaline-Saline Lake through Planting Arbor and Shrub

该试验在利用热电厂燃煤脱硫废弃物和改良促进剂将植树坑内回填土进行改良的同时，在树坑底部采取3种不同的垫层（稻草＋黄沙垫层，黄沙垫层、卵石＋黄沙垫层），研究将树坑内回填土进行改良的同时采用不同垫层植树后坑内土壤的pH值和全盐含量的变化情况及不同树木的成活率。试验结果表明：试验区不同深度土层平均pH值较试验前下降了9．01％～12．1％（P〈0．01），对照区不同深度土层平均pH值均有增加，试验区内稻草＋黄沙垫层pH值降低效果最好（P〈0．05）；试验区不同深度土层平均全盐含量较试验前下降1．62％～67．59％（P〈0．01），对照区不同深度土层平均全盐含量增加22．37％～58．21％，试验区稻草＋黄沙垫层全盐含量降低效果最好（P〈0．05）。树木成活率：在树木种植后的45天、75天和165天分别测定了发芽率和成活率，试验组间差异不显著（P〉0．05）；试验组与对照组比较差异极显著（P〈0．01）；国槐的成活率试验组比对照组提高28．67％～31．03％；白腊的成活率试验组比对照组提高88．13％～112．33％；云杉的成活率试验组比对照组提高46％；西府海棠的成活率试验组比对照组提高26．48％～33．61％。

In this study, together with the by-product of flue gas desulphurization from coal-fired power plant and krilium filled into tree well to improve alkaline soil character, three different cushion rubbers were arranged at the bottom of tree well （haulm plus sand, sand, cobblestone plus sand） . The objective of this study was to explore how soil pH, soil total salt content and tree survival rate respond to different treatments above. The results showed that： compared with soil pH analysed before experiment, the average pH of different soil depths in the treatment plots decreased by 9.01%-12.10% （P〈0.01） , whereas that of in the control plots increased generally. Between treatments, haulm plus sand had the most significant effect （P〈0.05） ; compared with soil total salt content analysed before experiment, the average soil total salt content of different soil depths in the treatment plots decreased by 1.62%-67.59% （P〈0.01） , whereas that of in the control plots increased by 22.37%-58.21%. Between treatments, haulm plus sand still had the most significant effect （P 〈 0.05） ; Germination percentage and survival rate were measured 45 d, 75 d, 165 d later, respectively. The result showed that there was no significant difference between three cushion rubbers in the experiment plots （P〉0.05） whereas great difference was observed between the treatment plots and the control plots （P〈0.01） ： compared with the control plots, the survival rate of sophora japonica, Fraxinus chinensis, Picea crassifolia and Malus micromalus in the treatment plots increased by 28.67%～31.03%, 88.13%～112.33% , 46.00% and 26.48%～33.61%, respectively.