| Effects of soil moisture storage at planting and supplementary irrigation on winter wheat yield and water use |
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| DOI：10.7606/j.issn.1000-7601.2022.02.15 |
| Key Words: winter wheat (Triticum aestivum L.) soil moisture storage at planting(SMSp) supplemental water grain yield utilization rate of available SMSp (Rc) water use efficiency |
| Author Name | Affiliation | | XU Weina | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | YANG Baoping | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | NIE Junfeng | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | DING Ruixia | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | YANG Wanzhong | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Qingfang | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Junpeng | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Peng | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China | | HAN Wenting | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | JIA Zhikuan | The Institute of Water\|saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi\|ecology and Tillage Sicence in Northwest Loess Plateau, Minister of Agriculture and Rural Affairs, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A 2-yr experiment was conducted in a mobile rain\|proof shed using a split\|plot design that included three soil moisture storage at planting (SMSp, 350, 450 mm and 650 mm) as main plot treatment and four supplemental water during the growing period (0, 56.3, 78.1, 100 mm) as split\|plot treatment. The results showed that under no supplemental water, the maximum utilization rate of available soil moisture storage at planting (SMSp) in the 0~200 cm soil profile was from 42.6% to 74.2% by the end of heading. The utilization rate was from 92.2% to 123.4% in the 0~50 cm soil profile, and from 53.9% to 65.3% in the 50 cm below. With increasing supplemental water, the utilization rate of available SMSp (Rc) in the 0~200 cm soil profile in 350, 450 mm and 650 mm SMSp increased. Rc with 100 mm supplemental water in the 0~200 cm soil profile increased by 7.5%, 37.2% and 4.3% in 350, 450 mm and 650 mm SMSp respectively than 56.3 mm supplemental water. With the development of winter wheat growth period, especially at reproductive growth stage, deep soil water storage played a positive compensation role. In the 0~200 cm soil profile, Rc decreased not only with the deepening soil, but also increased with increasing SMSp. Rc in the upper soil profile at planting\|heading stage was higher than at heading\|maturing stage, but Rc in the deeper soil profile was opposite. SMSp significantly affected winter wheat yield and its composition and water use efficiency. With the increase of water supply, the yield and yield components increased, and the worse the SMSp. The difference was not significant. The effect of low SMSp to yield was higher 70.9%~108.5% and 389.7%~402.7% middle and high SMSp, respectively. With the increase of SMSp, the water use efficiency of low SMSp increased 1.7%~1.8%, while the water use efficiency of medium and high SMSp decreased 0.7%~14.2%. SMSp was essential to ensure winter wheat grain yield on the Loess Plateau of China. Grain yield and the amount of consumed available SMSp had obvious nonlinear relationship. |
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