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Allelopathic effects of leaf litters of Eucalyptus camaldulensis on some forest and agricultural crops

Journal of Forestry Research 2008年第1期19卷 19-24页

作者： Romel Ahmed A. T. M. Rafiqul Hoque Mohammed Kamal Hossain Department of Forestry School of Agriculture and Marine SciencesShahjalal University of Science and Technology Institute of Forestry and Environmental Sciences University of Chittagong

Allelopathic effects of different doses of Eucalyptus camaldulensis leaf litters were investigated through an experiment in the green house of Institute of Forestry and Environmental Sciences, Chittagong, Bangladesh. Three popular agricultural crops： Falen （Vigna unguiculata）, Chickpea （Cicer arietinum）, Arhor （Cajanus cajan） and two widely used plantation trees： Sada koroi （Albizia procera） and Ipil ipil （Leucaena leucocephala） were selected as bioassay species. Experiment was set on tray at room temperature 27℃. The effects of different doses of leaf litter extracts were compared to the control. Results suggest that leaf litters of E, camaldulesis induced inhibitory effects, It was also found that the effect depend on concentration of extract and litterfall, type of receiver species. Higher concentration of the materials had the higher effect and vice versa. Though all the bioassay species were suppressed some of them showed better performance. Vigna unguiculata, Cicer arietinum are recommended in agroforestry based on this present Experiment output. In mixed plantation, Leucaena leucochephala is a better choice while compared to Albizia procera.

关键词： agroforestry choice of species inhibitory effect leaf litters mixed cropping mixed plantation

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Allelopathic effects of Leucaena leucocephala leaf litter on some forest and agricultural crops grown in nursery

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Journal of Forestry Research 2008年第4期19卷 298-302页

作者： Romel Ahmed A.T.M.Rafiqul Hoque Mohammed Kamal Hossain Department of Forestry School of Agriculture and Mineral SciencesShahjalal University of Science and Technology Institute of Forestry and Environmental Sciences University of Chittagong Laboratory of Ecology and Systematics Biology DivisionFaculty of ScienceUniversity of the Ryukyus

An experiment was conducted to assess the effect of leaf litter of Leucaena leucocephala on two forest crops Sada koroi （Albizia procera）, Ipil ipil （L. leucocephala） and three agricultural crops Falen （Vigna unguiculata）, Chickpea （Citer arietinum） and Arhor （Cajanus cajan） in the nursery of the Institute of Forestry and Environmental Sciences, Chittagong University, Bangladesh, in a Randomized Block Design. Results suggested that leaf litters ofL. leucocephala induced inhibitory effects on germination and growth of bioassay. It was also found that the effect depended on concentration of extract and litterfall, type of receptor species. Higher concentration of the materials had the higher effect and vice versa. Growth response of receptor crops varied with the variation of leaf litter application. The study revealed that application of low-dose leaf litter specially litter of 10 g·m^-2 had stimulating effect on shoot growth of C. arietinum, Vunguiculata and A. procera. While in all other cases significant inhibitory effect was observed and it was significantly increased with the increase of leaf litter application. However, the trend of inhibition was uneven with treatments. Root growth was found to be more affected than shoot growth.

关键词： allelopathy agroforestry choice of species inhibitory effect leaf litters mixed cropping mixed plantation.

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