《Table 4 Average soil temperature at 5 and 25 cm layers under each mulching treatment with days afte

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《"Effects of mulches on water use in a winter wheat/summer maize rotation system in Loess Plateau, China"》

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Note:The data are the average values of soil temperature over the ridges and in the furrows.Different lowercase letters within a line indicate significant differences among treatments at P<0.05 level at the same soil layer.

The variation characteristics of average soil temperatures at 5 and 25 cm layers in the wheat season of 2014–2015 were taken as examples（Table 4）.Increasing or decreasing in soil temperature caused by different mulching materials was maintained until 210 DAS，although the effects tended to decline with time.Before wintering（0–60 DAS），soil temperatures at both 5 and 25 cm layers were significantly higher in CK than those in M2 and in M3 than those in M4.During 75–120 DAS，M2 had higher temperatures than that in CK，which，to some extent，can protect plants from freezing damage.Relative to M4，the soil temperatures in M3 at 5 and 25 cm layers increased by averages of 0.7°C and 0.4°C，respectively.