As referenced to soil salinization problems in the afforestation in Lanzhou,four soil modifiers(YNEC,Kang Le,Pu Yuan and Lv Neng) were selected and used as the measure to modify the soil.

• 作者单位：中国农科院兰州畜牧与兽药研究所农业部兰州黄土高原生态环境重点野外科学观测试验站;