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來源資料
頁籤選單縮合
題 名 | 敷蓋對坡地微氣候之影響=Effect of Mulching on Microclimate of Slopeland |
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作 者 | 徐森雄; 吳嘉俊; 謝杉舟; | 書刊名 | 中華農業氣象 |
卷 期 | 4:1 1997.01[民86.01] |
頁 次 | 頁19-26 |
分類號 | 434.273 |
關鍵詞 | C值; 微氣候; 敷蓋; 腐化速率; C factor; Microclimate; Residue mulch; Decomposition rate; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究在國立屏東技術學院水土保持技術系坡地試驗區進行,試區坡度 9%,劃 分成 5 小區,每區寬 3 m,長 22.13 m。 地表予以百喜草殘株、稻榖、五節芒殘株、芒果 樹枝與裸露等敷蓋處理,以下觀測不同敷蓋材料對坡地微氣侯之影響。 自 1995 年 9 月以 迄 1996 年 7 月獲得之成果如下: 試區地表反射率隨敷蓋材料之色澤、含水量等而有很大 之差異,初期稻殼顏色較淺反射率高達 33%。百喜草殘株之地溫變化與裸地者甚為相近,但 稻殼敷蓋之地溫變化振幅最小,具有冬季保溫、夏季阻隔高溫的功效。稻殼敷蓋區因稻殼層 內之小氣囊包吸收地表向上輸送之水蒸氣,呈現較高之濕度。植物殘剩材料敷蓋區之裸露率 與敷蓋時間可以曲線迴歸表示,敷蓋材料之裸露率可從敷蓋以後之累積溫度、累積濕度、累 積降雨量等所組成之複迴歸式來推估。 |
英文摘要 | This study was carried out at National Pingtung Polytechnic Institute. All experiments were set up in a standard run-off polt, with slope steepness of 9%, slop length of 22.13 m, and plot width of 3 m. Surface was mulched with Bahia grass residue, rice chaff, Japaness silver grass residue or mango tree branches, and with bare soil as check. the preliminary results obtained from September 1995 to July 1996 can be summarized as the followings. Ground albedo was affected by color and moisture content to mulch materials. The rice chaff treatment had the higest albedo of 33%. Earth temperatures of plot muclhed with Bahia grass residue were similar to those of check plot. Variation of earth temperatures was the smallest in plot mulched with rice chaff as a result of preventing heat from penetrating into soil during summer and keeping heat from flowing out of soil during winter. Water vapor was trapped inside the inner space of rice chaff to increase the relative humidity on the mulching surface. Multiregression equations descriping the percentage of ground exposure were obtained. These equations explain the percentage of ground exposure in relation to cumulative temperature, cumulative humidity, and cumulative precipitation after application. |
本系統中英文摘要資訊取自各篇刊載內容。