The influence of different field mulching treatments on soil water content，soil temperature，
crop growth，final yield and water use efficiency was studied during the summer maize growing season in
the semi-humid region of Northwest China． The mulching treatments included the flat plot with straw
mulching ( SM) ，flat plot with plastic film mulching ( PM) ，ridge-furrow planting with film mulching
over ridge and wheat straw mulching over furrow ( SPM) ，and flat plot without mulching ( control
treatment，CK) ． The results showed that water content of mulching treatments in soil layer of 0 ～ 260 cm
depth was significantly larger than that of CK during maize growing period ( P ＜ 0. 05) ． The average soil
temperature in the soil layer of 0 ～ 30 cm depth showed a decreasing trend of PM，SPM，CK and SM，
and the average soil temperature of CK was larger than that of SPM when the soil layer was 0 ～ 15 cm
depth． The development of maize aboveground biomass can match well with the logistic curve． Moreover，
the average yields of SM，PM and SPM in the two-year experiment were increased by 15. 4%，23. 3%
and 28. 4% compared with that of CK，respectively ( P ＜ 0. 05) ． The water use efficiencies of SM，PM
and SPM were increased by 10. 2%，31. 2% and 28. 0% compared with that of CK，respectively ( P ＜0. 05) ． By comparison，the SPM can collect rainwater more effectively than other treatments and had the
largest aboveground biomass in theory． In the treatment of SPM，the rapid dry matter accumulation period
was earlier，and the cumulative rate was the fastest with a longer accumulation period，which meant that
the SPM can significantly improve the soil water-heat conditions，increase the accumulation amount of
crop dry matter，promote crop growth and improve water use efficiency． Therefore，the SPM was the
better choice for local farmers in the semi-humid region of Northwest China．
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