Jamshidi, S. and Hashemizadeh, S. and Shahrokhi, S.
(2011)
Assessment of auto-allelopatic potential of broomcorn (Sorghum vulgare var. technicum).
International Proceedings of Chemical, Biological and Environmental Engineering, 13.
116-120 .
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Abstract
Broomcorn as an ancient crop is a variety of Sorghum vulgare planting in Iran to produce
traditional cleaning broom. Miyaneh is one of the major broomcorn-growing regions in where farmers crop it
intensively since old ages. The crop is so profitable that they prefer not to include any other crops in rotation.
One of the problems in continuous cropping might be related to crop auto-toxicity. To evaluate of broomcorn
auto-allelopathic potential on its seed germination and initial growth, a sequence of laboratory and
greenhouse experiments were conducted by aqueous extract of broomcorn roots and shoots, instant and burnt
residues and root exudates using by Equal Compartment Agar Method as well. Shoot extracts were more
auto-toxic than roots’. Root exudates were negatively more effective on coleoptile growth than radicle.
Burning of residue could be considerable depression of auto-toxic potential of broomcorn. Auto-toxicity was
also reduced by residue aging up to 30 days.
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