棉花膜下滴灌墒情监测点个数研究

Experimental study of the arid zone of soil moisture spatial variability of cotton drip irrigation under mulch the law, and soil moisture monitoring cloth-point program was studied. Experiment was in May 2008 ~ September kuerle city in Xinjiang, intelligent mulched drip irrigation cotton farm in Baotouhu carried out to test an area of 48m × 56m, with 63 group of negative-pressure points 0 ~ 20cm, 20 ~ 40cm, 40 ~ 60cm A total of three layers of soil suction values measured before irrigation, the use of drying method rate of the soil suction value, through seven times the rate of soil moisture monitoring data for classical statistical analysis and geostatistical analysis to determine the number and location of monitoring points. The results showed that with the increase in the number of irrigation, soil moisture spatial variability decreased. Thus, according to the first irrigation the situation to design cloth-point program for a minimum significance using the classical method of statistical analysis of the area of 48m × 56m in the cotton fields and reasonable monitoring of the number of seven.