灌深度调节了亚热带果园的根水吸收:从稳定同位素和MixSIAR建模的洞察
Zhenjing Tan1,2,3, Min Li2, You Hu1,3,4
1Rural Water Conservancy Research Institute, Jiangxi Academy of Water Science and Engineering, Nanchang 330029, China.
Plants (Basel, Switzerland)
|February 27, 2026
概括
在果园中优化灌深度是关键. 中间灌深度 (50厘米) 改善了亚热带山区的土壤水,根生长和吸水效率.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 水文学的水文学
背景情况:
- 灌深度对于土壤水和果园的根部吸收至关重要.
- 在亚热带红色土壤丘陵地区的高蒸发率和浅水储存的机制尚不清楚.
研究的目的:
- 研究不同灌深度对土壤水动态,根特征和根吸水源的影响.
- 了解灌深度如何影响果园的用水效率.
主要方法:
- 在果园中进行了三次灌深度 (25,50,100厘米) 的实地实验.
- 土壤湿度监测,根形态分析,双稳定同位素 (δ2H和δ18O).
- 混合SIAR贝叶斯混合模型来确定根水吸收来源.
主要成果:
- 中间灌 (50厘米) 优化了40-120厘米层的土壤含水量,并增强了根生长.
- 浅灌 (25厘米) 导致表面干燥,并增加了对地表水的依赖 (高达93%).
- 中间灌促进了多层土壤的平衡吸收水,提高了用水效率.
结论:
- 灌深度显著影响土壤水分,根部发育和吸水策略.
- 优化地下灌深度对于提高亚热带果园的用水效率至关重要.
- 建议采用中间灌深度,以稳定水的可用性并减少蒸发损失.
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