关键词: 产量, 产量

Abstract:

To ascertain the situation of agricultural non-point source pollution in henan irrigation district had an important significance on environmental quality security and agricultural sustainable development of the Yellow River valley. Relative data about the issue of agricultural non-point source pollution of henan section in the lower Yellow River were analyzed in the study. And the author summed up the major factors of forming agricultural non-point source pollution. Then pointed out that the unreasonable use of agricultural chemicals and the discharge of living garbage and livestock waste caused different agricultural pollution. The different agricultural pollutants resulted in deterioration of groundwater. The average concentration of nitrate nitrogen in groundwater was 9.31 mg/L, close to the maximum concentration provided by the world health organization. The concentration of COD and ammonia nitrogen were 4.5815×106 t and 4.486×105 t respectively,which were 7.03 and 5.89 times of those of industrial and domestic sewage in the whole province.