Abstract: In this paper, change of soil moisture regime, water consumption, water consumption law and crop coefficient of spring wheat were studied and analyzed under drip condition in the whole growth period in north Xin- jiang through data measured in field experiment. The results showed that the soil water uptake by spring wheat root under drip irrigation condition was located between the depth of 0 cm and 60 cm. The soil water consumed from seedling to tillering stage is mainly at the depth of 0 to 40 cm. As the growth of plant root, the root water uptake gets increased. During the jointing stage, the absorbed water is mainly between the depth of 0 cm and 60 cm. As the limi- tation of root length, the range of soil water content changed little at the depth of 80 to 120 cm. The soil water con- tents of every soil layers decreased after stopping irrigation at mature stage. The scheduling of each stage by total water consumption at ascending order for spring wheat in north Xinjiang is heading stage, jointing stage, tillering stage, seedling stage and filling stage. The leaf area index and crop coefficient increased at first, and then decreased gradually from seedling stage to filling stage.

Key words: Drip irrigation, North Xinjiang, Spring irrigation, Water consumption

CLC Number: 

• S274.1