Chromolaena odorata is an aggressive weed that adversely affects cereal crops and grazing lands in Serengeti-Tanzania. This study investigated allelopathic. Allelopathic Effects of Chromolaena odorata (L.) King & Robinson on Seed Germination and Seedlings Growth of Paddy and Barnyard Grass. Fulltext – Effect of Chromolaena odorata on the Growth and Biomass Allelopathy is defined as the direct or indirect harmful or beneficial effect of one plant on.

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July | Australian Journal of Crop Science

The plant has been shown to enhance the buildup of organic matter in fallow system in tropical soil Agbim, ; Obatolu and Agboola, Allelopathic mechanisms of velvetleaf Abutilon theophrasti Medic. Research Journal of Environmental Sciences, 5: Chromolaena odorata is a member of the family Asteraceae. The maximum mean for grain Fe concentration over the locations was obtained for L Siam weed extract inhibited seed germination of weeds and crops and stimulated the growth of certain crops.

For pod diameter and seed length, epistasis could not be detected by both the tests, and in the expression of these two traits additive gene action was very important.

Carbon cycling under Chromolaena odorata L. Vegetable production is characterized by the heavy use of fertilizer and this may cause future environmental problem in both water and soil ecosystems.

Therefore, Chromolaena odorata might not be playing an inhibitory role on the growth and development of Celosia argentea. However, the crop dry weight at 10 WAP was markedly inhibited by the extract Table 4. Effect of seed rate and manual weeding on weed allellpathic and subsequent crop performance of sesame Sesamum indicum Odoratq. Allelopathic potential of Wedelia trilobata L. On cowpea and soybean, 14 and 8 percent reduction in seed germination, respectively was recorded when compared with the untreated control.

Journal of Applied Sciences and Environmental Management

Water extracts from several species of the family Asteraceae and the soil on which they were grown have been shown to inhibit germination and growth of other plant species Kil and Yun, ; Macias et al. Weed crop interaction with the stand point of allelopathy has been explored Lydon et al. Four replicates of each dish were made. Twenty five weed seeds were planted efgect 1cm deep, while fifty crop seeds were planted 3 cm deep. Maize height and number of leaves in cowpea were stimulated from 5 WAP by siam weed extract.


Factors affecting effectiveness of allelochemicals. The effect of Nitrogen deficiency on the concentration of caffeoqunic acids and scopolin in tobacco. Also, Einhellig had earlier affirmed that low level of allelochemicals could enhance synthetic processes.

These showed that the aqueous extract of Chromolaena odorata enhanced these growth parameters of Celosia argentea. The pots were watered every other day with ml distilled water. The pollen fertility changing patterns of aolelopathic mononuclear-heteroplasmic TGMS lines were studied under natural condition and low temperature treatments Harvesting of the plants were on weekly intervals for a period of five weeks.

The allelopathic potential of Chromolaena odorata on seed germination and seedling growth of vigina unguiculata var.

This was consistent with the chromolwena of Einhellig et al.

Rahman M and Subagyo T Review article Breeding improvements in safflower Carthamus tinctorius L. Seed yield, stover yield and their attributes were significantly improved in the weeded crop than in the non-weeded one.

John Willey and Sons, New York, pp: It was suggested that the weed should be soil incorporated to serve as green manure. How to cite this article: After ten days of applying the treatments we evaluated the activity of nitrate reductase, concentrations of protein and total soluble amino acids, proline, ammonia, macronutrients, and dry weight of the shoots and roots. Spatially demarcated 36 grids within soil series accounted for more variation in crop performance and reacted more significantly to temporal variation than soil series.

An organic biofertilizer NPKB was produced from earthworm compound enriched in N by inoculation with free living bacteria, effective in nitrogen fixation.

The pre-treated apple cubes demonstrated softer and crispier texture as well as an improved color when compared to control sample, obtained by freeze drying without pre-treatment. The composition was sieved and the extract was kept in a refrigerator at 5 o C for subsequent experiments.

Akobundu listed factors such as soil temperature, soil moisture regime, alternate wetting and drying of soil, soil nitrate level among others as those that affect seed germination. The root was then washed free of soil and then measured at a distance between the base of plant and root tip. At two weeks, the pots were allocated to the control and aqueous effct regimes and they were laid in a completely randomized design. The drying curves were fitted using three drying models – polynomial, Page and sigmoid.


Soybean plant height and number of leaves were not affected oddorata siam weed extract Tables 2 and 3. To prepare the extract, g of the whole plants except the root of Chromolaena odorata were cut into small chips of about 4 cm length and later grated with mechanical grater. Abstract Chromolaena odorata a weed in the family Asteraceae has been shown to enhance the buildup of organic matter in fallow system in tropical soil.

Results showed that the leaf extracts of C. The effects of alang-alang Imperata Cylingrica L. Experimental pots were allocated chro,olaena to the control no application but water and fresh plant aqueous extract treatment regime FSE. Log In Sign up! Record of germination percentage was taken for each seed type.

Corn and Soybean response to allelopathic effects of weed and residues. The optimum dose of top-dressed nitrogen in the common bean and castor intercropping system is 30 and 70 kg ha -1split at 25 and 35 DAE of the mentioned crops. Water was used because most allelochemicals are water soluble Reigosa et al.

Four statistical techniques consisted of canonical correlation CCprincipal component analysis PCcluster analysis, and stepwise regression were undertaken for exploring the relationships. The positive effect of spacing competition among explants was observed in all characters examined at ‘1.

Allelopathy is defined as the direct or indirect harmful or beneficial effect of one plant on another through the production of chemical compounds that escape into the environment Rice,