Abstract:

The objective of this study is to determine the effect of using anaerobic effluent of swine farm wastewater for winter wheat irrigation on soil contents of organic matter, total nitrogen, total phosphorus, copper, zinc etc. A field plot experiment was carried out to investigate the effect of irrigating winter wheat with anaerobic digested swine farm wastewater (ADSFW) on soil quality and ecological safety. The results showed that the organic matter content of the surface soil of the ADSFW irrigation treatment increased up to 3.0 kg/hm2, and total nitrogen content increased by 65%, while pH down 0.4, and copper, zinc, lead and cadmium content all met the requirements of NY/T 851-2004. These results only indicated the use of ADSFW in field irrigation would not result in the short term decline in soil quality and cause soil pollution, and the impact of long term irrigation needed further research to determine.