Ridge-furrow mulching with black plastic film improves maize yield more than white plastic film in dry areas with adequate accumulated temperature

•BP treatment produced lower topsoil temperatures than WP treatment.•Maize had a longer growth period under BP than WP treatment.•BP produced less total weed biomass at harvest than WP or conventional planting.•BP treatment produced higher grain yields than WP treatment.•BP was more net income than WP when temperature did not limit crop growth.