| Study on the infiltration characteristics and mathematical models of fertilizer solution bilaterally flowing into the film hole |
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| DOI：10.7606/j.issn.1000-7601.2013.06.013 |
| Key Words: film hole irrigation infiltration of fertilizer solution bilateral intersection infiltration characteristic mathematical model |
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| Abstract: |
| Based on the lab experiment, has analyzed the infiltration characteristics and put forward the four mathematical models for the fertilizer solution bilaterally flowing into the film hole. The reducing infiltration model was set up under the conditions that the free infiltration parameters and the reducing infiltration parameters of fertilizer solution flowing into film hole has been known. The piecewise function model was set up under the conditions that the infiltration model in each stage was total for the power function. The increasing infiltration ratio model was set up under the conditions of increasing infiltration rate that compared the fertilizer solution with the fresh wa
ter bilaterally flowing into film hole and the parameters of fresh water bilaterally flowing into film hole has been known. The reduction infiltration ratio model was set up under the condition of reducing infiltration rate compared the fertilizer solution single-line infiltrated into film hole with the fertilizer solution free infiltrated into film hole and the parameters of free infiltrationhas been known. These four models can be supplied rather accurate canculation results through the measured data. |