覆蓋與敷蓋對坡面土壤水文之影響
Other Title
Effects of Cover Crops and Mulching on Slopeland Soil Moisture
Journal
水土保持學報
Journal Volume
31
Journal Issue
1
Pages
1-9
Date Issued
1999-03
Author(s)
張賢明
萬鑫森
Chang, Hsien-ming
Wann, Shing-sun
Abstract
在18°之坡地上，利用排水式土壤滲漏裝置(Drainage lysimeter)三座，分別種植覆蓋作物喜多豆、百喜草及敷蓋戀風草處理，經十年之長期觀測，發現年降雨量中35%~90%為蒸發散所消手耗，5%~50%為地表逕流，7%~30%為地下滲流。種植覆蓋作物或敷蓋戀風草均能提高土壤有機質及孔隙率，改善土壤理化性，有助於雨水之滲漏，其效果百喜草遠優於喜多豆。由於覆蓋作物之吸水作用，停雨後在有根群生長之土壤含水量，持續降低，敷蓋戀風草處理則在停雨後3日即降至田間容水量，而保持穩定。各處理土壤含水量年度間變化量不大，不超過10公厘。而敷蓋戀風草處理年蒸發量與種植覆蓋作物百喜草及喜多豆之年蒸發散量大約相等。
The experiment was conducted at 18° a slopeland to measure the drainage of rainfall by drainage lysimeter under cropping treatments of Desmodium, Bahia grass and mulching Weeping love grass. The results indicated that during 10-year observation, 35%~90% of rainfall evaporated, 5%~50% runoff from the surface of land and 7%~30% was seepage. Three different treatments could increase organic matters and porosity, improve the physical and chemical property of soil enhance to water consumption with cover crops. Because of water consumption with crops the soil water decreased to field capacity after rainfall stopped, whereas the other treatment took 3days after rainfall to reach the same situation. Water capacities in soil at different treatments varied insignificant by. Water evaporation per year among cover crops was similar.
Subjects
覆蓋
敷蓋
坡地土壤
土壤水份
Cover
mulching
Slopeland
soil moisture
Publisher
國立中興大學水土保持學系暨研究所
Type
journal article