Statistical Characteristics Research of Soil Surface Temperature under Mulched Drip Irrigation for Spring Maize in Hexi Corridor Area
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
