Comprehensive assessment on soil quality in jinghuiqu irrigation district of Shaanxi province

Taking Jinghuiqu irrigation district that is one of the main grains and vegetables bases of Shaanxi province as study object, investigating current situation of soil quality and analyzing soil samples, and on the base of calculating indexes weight of soil quality assessment by using analytical hierarchy process, comprehensive assessment of soil quality has been researched by using comprehensive index method. Fourteen indicators has listed as pH, Organic matter, alkali-hydrolyzable N, available P, available K, Cu, Zn, Pb, Cd, Cr, As, Hg, total soluble salt, nitrate in groundwater as an integrated indicator system. The results show that that soil possesses high quality level in irrigation district is accounted to 75.3%, and moderate level is accounted to 20.8%. The average of soil quality comprehensive index is 0.82, which belongs to second-class, and soil possesses high quality level. This conclusion is reasonably in accordance with the practical situation.