Abstract:Changes of soil quality caused by different fertilization under different cropping systems may affect the production, and potentially air and water quality. This paper investigated the differences of OM, total N, microelements and heavy metals in 0~30cm soil layer and NO~-_3-N, NH~+_4-N, available P and K, pH and electrical conductivity in 0~90 cm soil profile after long-term different fertilization in two cropping systems, rotation of wheat and corn and plastic greenhouse vegetable in north China. The resu...