Research Progress of Drip Irrigation under Film

Technology of drip irrigation under film has played an important role in China′s agricultural production.Mulching has certain effects on soil temperature，water retention，weeding and salt suppression.Drip irrigation under film could improve water fertilizer utilization and increase yield.But extensive use of plastic film has produced a lot of plastic film waste，moreover，drip irrigation under film could reduce water infiltration and nutrient migration，its perennial use has an adverse impact on land use.Development process，advantages，problems and technical essential factors were systematically introduced，and some development measures were put forward in the future，such as improving use criterion of film，developing residual film recycling machinery and developing multi-purpose film and biodegradable film.