Study on water consumption regularity and water stress response of hybrid wheat Abstract uri icon

abstract

  • Hybrid wheat is considered to have excellent stress resistance potential. The results show that: (1) the total water consumption of hybrid wheat was 3084.2 m3 ha-1-4405.1 m3·ha-1, which was 3.0%-8.5% less than that of common wheat. (2) With less irrigation, the soil water consumption of hybrid wheat increased significantly, accounting for up to 55.3% of the total water consumption of hybrid wheat. (3) Under the same limited irrigation conditions, the proportion of precipitation in the total water consumption of hybrid wheat was higher than that of common wheat, which indicated that hybrid wheat had better characteristics of rapid response to rewatering after long water stress. (4) The water consumption intensity (WCI) of hybrid wheat was lower in the early stage, but increased significantly after anthesis, and was lower than that of common wheat in the whole growth period. (5) The biomass water use efficiency (BWUE) of hybrid wheat was higher than that of common wheat, which was also in all growth stages. It indicated that hybrid wheat had prominent advantage in biomass accumulation under relatively low water consumption. (6) The water use efficiency (WUE) of hybrid wheat was up to 1.66 kg·m-3, which was significantly higher than that of common wheat (1.36 kg m-3). The two irrigation schedules in spring, water at jointing (W1) and water at jointing & anthesis (W2) had no significant difference in yield and water use efficiency. Comprehensive comparison showed that only one-time irrigation in spring was suitable for hybrid wheat, and it could achieve the goal of water saving and high yield simultaneously. Compared with common wheat, hybrid wheat has outstanding advantages in water saving and higher water use efficiency. Large scale application of hybrid wheat will be of great significance to alleviate the shortage of water resources in northern China.

publication date

  • September 2022