Effects of Permeable Irrigation on Cotton in Semiarid Region

The experiments were conducted from 1996 to 1997 to study the effects of different permeable irrigation quotas and water pipe depth on soil moisture content, and the growth and yield in semiarid region in Southern Shanxi Province. The results show that lint yield of cotton increased by 17.3%～27.3% with 225～300 m³/hm² of permeable irrigation quota in high annual precipitation and increased by 24.35%～42.55% in low annual precipitation. The depth of water pipe under soil surface were 13 cm to 20 cm, which lint yield of cotton increased by 8.67%～10.92% compared with soil surface permeable irrigation.