| 摘要: |
| 根据养分在土壤-根系统中运移和吸收机制,同时考虑植物的根系生长、根系水分吸收以及土壤养分浓度的变化等特点,通过时段的控制,实现根际环境中稳态的养分剖面,在此基础上建立了根系吸收养分的稳态模型.根据实测的土壤、植物养分运移和吸收参数,用逐步迭代的方法计算植物根系的吸收养分总量,该模型具有计算简单,模拟条件灵活变化的特点. |
| 关键词: 土壤-根系统 养分迁移 养分吸收 数学模型 |
| DOI： |
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| 基金项目:国家杰出青年基金资助项目(49725102) |
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| Numerical simulation of nutrient transfer and absorption in soil-root system |
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| Abstract: |
| According to mechanism of nutrient transfer and absorption in soil-root system and root growth,water uptake,and soil solution concentration as time-varying input,a steady-state model of nutrient uptake was established by considering the concentration profile around the roots to be in steady state at each time step.The solution was obtained by the method of iteration step by step according to measured nutrient transfer and absorption parameters within soil and plant.The model has characteristics with simple calculation and flexible change in imitating conditions. |
| Key words: soil-root system nutrient transfer nutrient absorption mathematic model |
