Moisture migration regularity and new irrigation method in the sandy soil of river ancient channel

The moisture migration regularity and the new irrigation method in the sandy soil of river ancient channel were studied. The results indicate that the soil water evaporation capacity in 7 days with different treatments of irrigating water quota is not significantly different. The trial in 7-year pear trees soil indicates that the sufficient irrigation and the reduction of the frequency of irrigation can save water and raise the yield. The soil moisture can not make a breakthrough of the pear tree's major root system scope as the irrigating water quota is 1200m³/hm² and the soil moisture does not suffice the peer when the irrigating water quota is 600m³/hm² and the peer trees are irrigated 6 times in the growing period of the trees. The irrigating water quota of 900m³/hm² and the 4 times irrigation in the growing period of the trees is the suitable method.