Abstract: Aiming at finding best planting patterns mulching with re-used plastic film， the study investigated the effects of re-used plastic film mulching under different planting patterns( mulching on lines( JS) and mulching under lines( JJ) ) on sunflower's yield and water use efficiency by compared with bare field in Hetao area，China． The results showed that，both planting patterns with re-used film mulching could increased soil water at different degree． Compared with bare field， soil moisture of re-used film was higher significantly in 0-40 cm，and no significant in 40-100 cm． Meanwhile， the grain yield and water use efficiency( WUE) of re-used film were higher significantly than that of bare field in 0-40 cm，especially the grain yield of JJ were higher significantly than that of bare field 12． 92% in 2010 and 17． 82% in 2011， than that of JS 1． 34% in 2010 and 0． 88% in 2011，but no significant． So it was worth to apply re-used film to agriculture production for improving the soil moisture，enhancing water use efficiency and increasing the yield of sunflower． At the same time，especially，we suggest that the application of re-used film mulching on the lines as a suitable soil management practice increase soil water and WUE in Hetao area or other areas with similar conditions．

Key words: Re-used plastic film mulching, Sunflower, Yield, Water use efficiency( WUE)

CLC Number: 

• S565.5