Determining root water uptake of two alpine crops in a rainfed cropland in the Qinghai Lake watershed: First assessment using stable isotopes analysis
Determining root water uptake of two alpine crops in a rainfed cropland in the Qinghai Lake watershed: First assessment using stable isotopes analysis
复制标题
确定青海湖流域雨养农田中两种高山作物根部吸水量：使用稳定同位素分析进行首次评估
DOI：
10.1016/j.fcr.2017.10.011
复制
发表时间：
2018
影响因子：
5.8
通讯作者：
Li Xiaoyan
中科院分区：
文献类型：
--
作者：
Wu Huawu;Li Jing;Zhang Cicheng;He Bin;Zhang Haixia;Wu Xiuchen;Li Xiaoyan
作物根系吸水(RWU)的知识是理解农业水分管理的关键。然而，旱地高山作物RWU的潜在机制仍然知之甚少。研究了甘蓝型油菜(Brassica napusL.)和青岛型大麦(Hordeum uggarl.)再加上不同生长阶段的双稳定同位素示踪剂。直接推理法表明，根系主要吸收水分的土壤深度层为0-30 cm。更具体地说，油菜和青稞表现出不同的RWU模式：油菜表现出较高的柔韧性，可根据生长高峰期短期干旱的土壤可利用性恢复到深层(30~60 cm)作为主要水源。相比之下，青麦的水分吸收主要来自整个生育期的浅层和中层土壤(30 Cm)。结果表明，不同生育期的灌水湿润深度以30 cm以上为宜。
Knowledge of crop root water uptake (RWU) is critical for understanding agricultural water management. However, the mechanisms underlying the RWU of alpine crops in rainfed cropland remain poorly understood. This study investigated seasonal variations in water uptake of oilseed rape (Brassica napusL.) and highland barley (Hordeum vulgareL.) coupled with dual stable isotope tracers at different growth stages. The method of direct inference showed that the soil depth layer from which water was predominantly taken up by roots was 0–30 cm. More specifically, oilseed rape and highland barley exhibited different RWU patterns: oilseed rape had the high flexible performance and could revert to deep soil layers (30–60 cm) as the main water source according to soil water availability due to short-term droughts at the peak growth stage. In contrast, water uptake by highland barley was primarily derived from both shallow and middle soil layers (<30 cm) throughout all growth stages. These findings indicated that the appropriate irrigation wetting depth should be above 30 cm for the different growth stages.
登录
查看更多内容
影响因子：
6.7
作者：
S. S. Burgess-S.;M. Adams;N. Turner;B. Ward
通讯作者：
S. S. Burgess-S.;M. Adams;N. Turner;B. Ward
影响因子：
2.2
作者：
Candice M. Link;N. Thevathasan;A. Gordon;M. Isaac
通讯作者：
Candice M. Link;N. Thevathasan;A. Gordon;M. Isaac
DOI：
10.1111/j.1469-8137.2012.04170.x
发表时间：
2012-07
期刊：
The New phytologist
影响因子：
--
作者：
A. West;A. West;Todd E. Dawson;E. February;G. Midgley;William J. Bond;T. Aston
通讯作者：
A. West;A. West;Todd E. Dawson;E. February;G. Midgley;William J. Bond;T. Aston
影响因子：
64.8
作者：
DAWSON, TE;EHLERINGER, JR
通讯作者：
EHLERINGER, JR
影响因子：
5.2
作者：
DONOVAN, LA;EHLERINGER, JR
通讯作者：
EHLERINGER, JR