頁籤選單縮合
題 名 | 田菁生長及根系對水份傳輸之影響研究=Model on Soil Water Movement in Root Zone of Green Manure |
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作 者 | 張東炯; | 書刊名 | 高苑學報 |
卷 期 | 10 民93.07 |
頁 次 | 頁37-53 |
分類號 | 434.99 |
關鍵詞 | 田菁根系; 一維模擬; Root of green manure; One dimension simulation; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以田菁綠肥作物為對象,從現場及實驗室分別了解其根部與莖部生長之情形,並且對種植田菁作物後其對水分滲漏之影響作一維之數值模擬。實驗結果顯示田菁莖部及其根系生長變化之關係為Y=2.595Ln(x)+2.2879式中之Y為田菁根部生長高度(公分),X為田菁莖部生長高度(公分)。利用本研究所建立之數值模式,配合現場觀測數據所得迴歸資料來模擬有根系、無根系及不同根系其對土壤水份有何不同之影響,結果顯示在有根系區域之水分將比無根系區域減少,且長方型根系,離地表面愈近壓力水頭變化愈大,到了地下深度23公分其水頭變化已很小。另外,吸收力為三角型根系,其壓力水頭變化在地下15公分以內呈現減少,15公分以後壓力水頭之變化甚小,吸收力為雨傘型根系,略與三角型相同。顯示三種不同之根系分析可以得知會影響壓力水頭之變化。 |
英文摘要 | This research regard green manure as the object, understand the situation of its root and stem a growth respectively from the scene and laboratories, and make a simulation of one dimension to imitate to the influence that humidity seep into after planting the crops to it. The experiment result manifestation the relation of the variety as the Y=2.595 Ln(x)+2.2879 Y in the height for a main root (cm), X is the grows the height for the stem. (cm). Make use of the numerical mode of this institute establishment, match with the scene to prognosticate the data income regression data to imitate the root department and have no root department and different types of root its to an influence in soil water, as a result show at the humidity of having a root department district decrease than having no, and a zone of rectangle type root, a variety of in its pressure water head present larger at surface and gradually decrease to that at 23 cm of soil depth. For the triangle root, it pressure head present larger at surface and gradually decrease to that at 15 cm of soil depth, and for umbrella root, its pressure head slightly and a homology. Shows that three kinds of department analysis can know and will affect the variety of the pressure water head. |
本系統中英文摘要資訊取自各篇刊載內容。