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土壤水分有效性对梭梭苗根系导水率的动态影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
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  • 维普
为探讨土壤水分有效性和萌芽后天数对梭梭苗根系导水率的影响,进行了盆栽试验.试验结果表明,梭梭苗的根系总导水率随土壤水分有效性和萌芽后天数的增加均呈线性增加；梭梭苗的单位面积根系导水率随土壤水分有效性的增加呈先增后减的抛物线变化,随萌芽后天数的增加呈线性递减.获得的梭梭苗根系导水率的动态变化规律,可用于根系吸水动力学模型和植物体水分传输规律的研究.
Dynamic Influence of Soil Water Effectiveness on Root Hydraulic Conductivity of Haloxylon ammodendron Sapling
The effects of soil water availability and the days after budbreak on the root hydraulic conductivity in Haloxylon ammodendron sapling with potted plants was quantitatively analyzed. The results showed that the entire root hydraulic conductivity of Haloxylon ammodendron sapling increased linearly with soil water availability and the days after budbreak; the root hydraulic conductivity per unit root surface area of Haloxylon ammodendron sapling increased at first and then decreased according to parabola with soil water availability, and the root hydraulic conductivity per unit root surface area of Haloxylon ammodendron sapling decreased linearly with the days after budbreak. The obtained quantitative relationships between root hydraulic conductivity of Haloxylon ammodendron sapling and soil water availability and the days after budbreak can be applied to the research of root water uptake dynamic models and the research of plant water transfer.

Haloxylon ammodendronRoot hydraulic conductivitySoil water effectivenessDays after budbreak

姚立民、李伏生、佟玲、谢恒星

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西北农林科技大学旱区农业水土工程教育部重点实验室,陕西杨凌712100

广西大学农学院,南宁530005

中国农业大学中国农业水问题研究中心,北京100083

梭梭 根系导水率 土壤水分有效性 萌芽后天数

国家重点基础研究发展规划(973计划)国家自然科学基金国家自然科学基金国家高技术研究发展计划(863计划)水利部公益性行业科研专项项目

2006CB40340640771034508690012006AA100203200801104-2

2011

农业机械学报
中国农业机械学会 中国农业机械化科学研究院

农业机械学报

CSTPCDCSCD北大核心EI
影响因子：1.904
ISSN：1000-1298
年,卷(期)：2011.42(5)
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