## 3 Results  
### Dynamic Changes in the Soil Moisture Content of Winter Wheat under Different Irrigation Treatments  
Dynamic changes in the soil moisture content in different growing periods of winter wheat during the two years experiments are shown in Figure 2. Overall, the water content of soil below 140 cm fluctuated less from 2020 to 2021 than that from 2021 to 2022. After irrigation, the change in soil water content in the 0-60 cm soil layer for each treatment in the two years trials was greater than that in the 60-200 cm soil layer. Before the jointing stage of each treatment, the soil profile had a high water content and uniform distribution; with the advancement of the growth process, the soil moisture content reduced gradually. The soil moisture content decreased faster after the jointing stage than before the jointing stage. Due to the lack of soil water supplement after the booting stage of the W1 treatment, the soil water content decreased sharply in the late growing stage of winter wheat from 2021 to 2022 (Figure 2d). However, the soil water content under 140 cm was not significantly reduced from 2020 to 2021 (Figure 2a). W2 and W3 treatments were irrigated after the booting stage to supplement the soil moisture content, so the soil water content under the 100 cm soil layer changed little during the whole growth period. In the two-year experiment, the decrease of soil moisture content in the 0-100 cm soil layer was greater than that under the 100 cm soil layer. Water Consumption of Different Soil Layers in the Winter Wheat Growth Period under Different Irrigation Systems  
From Table 1, in the two-year experiment, the water consumption of the winter wheat growing period under the W2 and W3 treatments mainly came from the soil layer above 100 cm, accounting for 77.06-87.39% and 69.30-94.22% of the total soil water consumption,  
Figure 2: Dynamic changes in the soil water content of winter wheat under different irrigation systems: the horizontal axis is the growth period (S: sowing date; W: wintering period; J: jointing stage; B: booting stage; F: filling stage; M: mature stage). respectively. Compared with the W2 and W3 treatments, the utilization capacity of soil moisture in the 100-150 cm soil layer of the W1 treatment was remarkably improved, accounting for 15.71% and 26.36%, respectively. Under the same irrigation system, the SWC in the 100-200 cm soil layer in 2020-2021 was lower than that in 2021-2022. In the two-year experiment, the soil water consumption decreased with the increase in the irrigation volume. Except for the soil water consumption above the 50 cm soil layer, the difference between the W1 and W2 treatments did not reach a significant level, but the soil water consumption in the other soil layers of the W1 treatment was found to be obviously higher than that of the W2 and W3 treatments. In 2020-2021, there was a notable difference in soil water consumption between the W2 and W3 treatments above the 50 cm soil layer, and the difference between the W2 and W3 treatments was not notable in 2021-2022. Total Water Consumption and Water Consumption Structure of Winter Wheat under Different Irrigation Systems  
As shown in Table 2, presowing soil moisture storage, soil moisture storage consumption, and total water consumption in 2020-2021 were lower than those in 2021-2022 under the same irrigation system. Under different irrigation systems, the total water consumption in 2020-2021 was W2 \(>\) W3 \(>\) W1, with the W2 treatment being remarkably higher than the W1 and W3 treatments. In 2021-2022, the total water consumption showed that W3 \(>\) W1 \(>\) W2, with a notable difference among the W2 and W3 treatments. The percentage of precipitation in 2020-2021 was W1 \(>\) W3 \(>\) W2, with the W2 treatment receiving a significantly lower amount than the other treatments. In 2021-2022, it was W2 \(>\) W1 \(>\) W3, and the variance in precipitation between the W2 and W3 treatments was significant.