植物根系吸收土壤水分的数学模型
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MATHEMATICAL MODEL OF SOIL MOISTURE ABSORPTION BY PLANT ROOTS
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    摘要:

    本文根据植物根系吸水的物理过程,提出了一个能反映根系吸水机理的宏观数学模型,模拟结果与试验之间进行比较的情况非常令人满意,因而本模型具有较高的预报能力。在描述SPAC中水分运输的过程中,定量描述了相关的水势分量,同时还探究了这一过程中能量转换和消耗的特征。根系吸水速率与有效根密度的关系甚为密切。有效根密度的物理基础是单位土体中毛根的长度。因此,可采取优化的技术措施来加强根系发育,尤其是增加毛根的长度和数量,从而可提高植物的水分利用效率和创造高额的生物产量和经济产量。

    Abstract:

    A model based on the physical process of water absorption by plant roots has been suggested in this paper. Data obtained from the comparison between modeling results and experimental results showed that this model is quite satisfactory for prediction of soil moisture regime. Quantitative description of water potentials in soil, plant and atmospliere. In describing the interlinked process of water transport was made in the modelling water movement process, and the characteristics for process of energy consumption and transformation in the water movement process was also investigated simultaneously. It was also showed from the results obtained that the relationship between water absorption was close related to the effective root density. Therefore, it is of most importance to promote and strengthen the development of plant roots.

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邵明安,杨文治,李玉山.植物根系吸收土壤水分的数学模型[J].土壤学报,1987,24(4):295-305. Shao Mingan, Yang Wenzhi, Li Yushan. MATHEMATICAL MODEL OF SOIL MOISTURE ABSORPTION BY PLANT ROOTS[J]. Acta Pedologica Sinica,1987,24(4):295-305.

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  • 在线发布日期: 2013-02-25
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