| Hydraulic Resistance and Capacitance in the Soil-Plant System |
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| 作者姓名： | SHAO MING-AN L.P. SIMMONDS CHEN ZHI-XIONG |
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| 作者单位： | Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100;Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100;Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100 |
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| 摘 要： | In this paper, the hydraulic resistances and capacitances were evaluated. based on the development of non-(?) model of water flow in the soil-plant system and the simulating experiment work.The results show that the mean hydraulic resistance in the soil-plant system is 6.79×109 MPa·S·m-3; the mean hydraulic capacitance in the system is 5.2×107m3·MPa-1. In the components of hydraulic capacitance in the system, the capacitance in soil (81.8×10-6m3·MPa ) is the biggest and its variability with suii water potential is extremely strong, the capacitance in plant (5.3×10-7m3·MPa-1) is much smaller than that in soil, and the capacitance in shoots (15.5×10-7m3·2MPa-1) is bigger than that in roots (8.4×10-7m3·2MPa-1). An interesting result is that the capacitance in plant is almost equivalent to that in the soil-plant system.
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| 关 键 词： | 土壤－植物系统 叶水势 电容 水流 阻力 |
Hydraulic Resistance and Capacitance in the Soil-Plant System |
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| SHAO MING-AN,L.P. SIMMONDS,CHEN ZHI-XIONG.Hydraulic Resistance and Capacitance in the Soil-Plant System[J].Pedosphere,1991,1(3):193-206. |
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| Authors: | SHAO MING-AN LP SIMMONDS and CHEN ZHI-XIONG |
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| Institution: | Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100;Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100;Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100 |
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| Abstract: | In this paper, the hydraulic resistances and capacitances were evaluated. based on the development of non-(?) model of water flow in the soil-plant system and the simulating experiment work.The results show that the mean hydraulic resistance in the soil-plant system is 6.79×109 MPa·S·m-3; the mean hydraulic capacitance in the system is 5.2×107m3·MPa-1. In the components of hydraulic capacitance in the system, the capacitance in soil (81.8×10-6m3·MPa ) is the biggest and its variability with suii water potential is extremely strong, the capacitance in plant (5.3×10-7m3·MPa-1) is much smaller than that in soil, and the capacitance in shoots (15.5×10-7m3·2MPa-1) is bigger than that in roots (8.4×10-7m3·2MPa-1). An interesting result is that the capacitance in plant is almost equivalent to that in the soil-plant system. |
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