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The effects of plant density of Melastoma malabathricum on the erosion rate of slope soil at different slope orientations

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International Journal of Sediment Research 2015年第2期30卷 131-141页

作者： Aimee Halim osman normaniza Institute of Biological Sciences Faculty of ScienceUniversity of Malaya

Malaysia's cut slopes,especially for road lines accommodation,are prone to erosions and *** problems mainly occur due to lack of vegetation cover and strong erosive *** addition,the topography factors have also become a major factor affecting soil ***,this study is aimed at determining the effects of planting density of a selected species,namely Melastoma malabathricum;one,two,and three seedlings per box,on the erosion rate at selected slopes of different orientation(morning and evening sun) at the Guthrie Corridor Expressway,*** six months of observation,treatment with three seedlings/box on the morning sun slope showed a lower erosion rate by 69.2%than those with the same treatment on the evening sun *** addition,the treatment of the three seedlings recorded at month six(final observation) had the highest reduction of soil saturation level(STL),by 23.6%.Furthermore,the physiological values of the species studied,grown on the morning sun slope,were higher in terms of stomatal conductance and photosynthetic rate by 12.1%and 15.8%(three seedlings/box),*** overall results showed that plant density was inversely related to the STL and erosion rate on the *** conclusion,a planting density of three seedlings/box and morning sun orientation gave positive effects on the plant's physiological performance of the slope,reducing the STL,as well as alleviating the erosion rate of slope soils.

关键词： Melastoma malabathricum Erosion rate Plant density Physiology Slope orientations Soil saturation level

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Hydrological and mechanical properties of plants to predict suitable legume species for reinforcing soil

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Chinese Science Bulletin 2014年第35期59卷 5123-5128页

作者： Mohammed Saifuddin normaniza osman Institute of Biological Sciences Faculty of ScienceUniversity of Malaya

Plants have considerable hydrological and mechanical impacts on ***,there are lack of documentation and limited understanding on the hydrological and mechanical impacts of tropical legume ***,this study was aimed to investigate the hydrological and mechanical properties of three selected legume plants,Leucaena leucocephala,Adenanthera pavonina and Peltophorum *** hydrological aspect,the study results indicated that soil on which the *** was grown had the highest transpiration rate,water absorption rate(WAR) and soil matric suction(SMS).In terms of mechanical characteristics,*** exhibited the highest root tensile strength and cellulosic components in the ***,*** also showed a higher root biomass,root length and fine roots than *** and *** leaf area index(LAI) strongly correlated with SMS(R2= 0.74),indicating that high LAI improved *** high root tensile strength and fine roots of *** make this species special for growing as a soil reinforcing *** results suggested that *** exhibited outstanding hydrological and mechanical properties and can be a potential plant for the soil reinforcement program.

关键词：土壤加固豆科植物水文性能预测力学机械冲击抗拉强度叶面积指数

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