Using stable isotopes to quantify root water uptake under a new planting pattern of high-low seed beds cultivation in winter wheat

文献类型： 外文期刊

第一作者： Liu, Junming

作者： Liu, Junming;Si, Zhuanyun;Chen, Jinsai;Gao, Yang;Duan, Aiwang;Liu, Junming;Si, Zhuanyun;Chen, Jinsai;Wu, Lifeng

作者机构：

关键词： Winter wheat; High-low seed beds cultivation; Root water uptake; MIXSIAR model; Stable isotopes; Irrigation wetting depth

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）

ISSN： 0167-1987

年卷期： 2021 年 205 卷

页码：

收录情况： SCI

摘要： Coupling effective cultivation patterns and suitable irrigation scheduling may provide insight for the development of water-saving agricultural systems. A 2-year field experiment was conducted to determine seasonal dynamics in root water uptake (RWU) of winter wheat under a new planting pattern of High-Low Seed Beds Cultivation (HLSC). Stable isotopes of delta D and delta O-18 in different water sources were measured and the RWU of wheat was quantified by the MIXSIAR model. The proportions of RWU from the 0 similar to 30 cm soil layer at different growth stages were significantly different for the wheat on the low beds, while it was not significantly different for the wheat on the high beds. Winter wheat took approximately 65 % of its required water from the 0 similar to 60 cm soil throughout all growth stages. However, for an irrigation with a 90 mm quota, the experimental result showed that only 72 % of the irrigated water was finally stored in the soil layer of 0 similar to 60 cm, which indicated nearly 30 % of the irrigated water infiltrated below 60 cm and will be less available. These results suggested that the designed irrigation wetting depth for winter wheat should be set as less than 60 cm under HLSC pattern.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序