| Effects of soil water regulation in growing period on spring wheat growth and water use in Hexi areas under drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2017.01.26 |
| Key Words: drip irrigation spring wheat soil water yield water use efficiency |
| Author Name | Affiliation | | ZHANG Yu-xin | Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Fu-cang | Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZOU Hai-yang | Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Dong-feng | Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China
Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to explore the drip irrigation mode to improve the growth and yield of spring wheat in Arid Areas, field plot experiments were carried out with the spring wheat species of Yongliang 4. Five lower soil water limits (i.e. W1(55%、60%、55%、50%), W2（60%、65%、60%、55%），W3（65%、70%、65%、60%）, W4（70%、75%、70%、65%） and sufficient irrigation (CK) （75%、80%、75%、70%）) were applied at different growing stages (emergence～tillering, jointing～booting, heading～anthesis, filling～maturity) to study the effects of soil water regulation on spring wheat growth，yield and water use efficiency in Hexi areas. The results showed that at the same fertilizer level, the increase in lower soil water limits increased the plant height and LAI of spring wheat. Compared with the W4 treatments, the plant height and LAI of the sufficient irrigation treatment (CK) increased by 2.19% and 7.93%. However, compared with sufficient irrigation treatment (CK)，total dry matter accumulation and its distribution amount to grain of W4 treatment had significantly increased respectively by 5.63% and 17.14%. With the increase in lower soil water limits, the field and water use efficiency（WUE）in all treatments increased first and then decreased. Compared with W3 treatments, the water use efficiency（WUE）of W4 treatment was reduced by 2.82%. However, the treatment W4 showed the highest field, which was increased by 7.53% and 4.07%, compared with that of the W3 and CK treatments. In summary, the appropriate soil water regulation at growing stages is beneficial to the growth and high yield of spring wheat. Comprehensively considering the water saving and high field, the treatment W4 is selected as the optimal water treatment under the present experimental conditions. |
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