Soil temperature significantly influences crop growth.This study explores the variations in soil sur-face temperature under mulched drip irrigation for spring maize in the arid region of Minqin County.A field experi-ment was conducted with four treatments which include mulched drip irrigation at 240 m3/ha(FDT1),300 m3/ha(FDT2),420 m3/ha(FDT3)and 420 m3/ha without mulch drip(WMD).The results showed that under the extra-high temperature year in 2017,the temperature of maize under mulched drip irrigation at 8:00 in each growth period was 0.27-1.03℃ higher than the ground temperature monitored by the meteorological station,and 0.73-1.49℃ higher than WMD,indicating that drip irrigation under film had obvious thermal insulation effect.The temperature of maize under mulched drip irrigation at 14:00 and 20:00 was respectively 1.75-4.41℃ and 6.86-9.83℃ higher than the ground temperature monitored by meteorological station,and higher than WMD-0.28-2.38℃ and 1.07-2.97℃,which all indicated that mulched drip irrigation had obvious constant temperature effect.The temperature before foli-ar mulching at 8:00 and 20:00 respectively increased by 2.11-3.15℃ and 0.53-1.59℃ compared with that after foli-ar mulching,while the temperature at 14:00 decreased by 1.20-4.56℃.After leaf mulching,the soil temperature changed slightly and soil heat capacity remained at a stable level,which provided a stable temperature space for maize growth.
Spring maizeMulch-drip irrigationStatistical eigenvalueHexi Corridor Area
NETL
NSTL
万方数据
