Effects of organic and inorganic amendments on weed management in sweet maize
نویسندگان
1 Open Univ. of Cyprus, Nicossia. Cyprus.
2 Laboratory of Crop Production, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece.
3 School of Biological Sciences, University of Reading, P.O. Box. 217, READING, Berksire, RG6 6AH, United Kingdom.
4 Laboratory of Agronomy, School of Agriculture, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece.
5 Laboratory of Weed Management. Univ. of Thessaly. Volos, Greece.
doi
10.22069/ijpp.2012.766چکیده
Field experiments were conducted to determine the effects of organic andinorganic amendments on weed suppression in sweet maize cultivation (Zea maysL.). A randomized complete block design was employed with four replicates pertreatment with each organic amendment used at half (x/2), single (x=10 t ha-1) anddouble (2x) rates (organic fertilization: cow manure, poultry manure and barleymulch; synthetic fertilizer (240 kg N ha-1: 21-0-0); and control). The highestnumber and dry weight of weeds were recorded for double cow manure andchemical fertilizer treatments. The cow manure treatments promoted weedemergence and growth proportionally to the rate of application (x/2<x<2x). In thepresence of barley residues, weed biomass or density was reduced for the species:redroot pigweed (Amaranthus retroflexus L.), common purslane (Portulacaoleracea L.) and prostrate knotweed (Polygonum aviculare L.). Weed suppressiveeffect of barley residues decreased with time following residue decomposition. Thebarley mulch plots presented the highest values of Shannon-Weiner and Simpsonindices. These results indicate that green manure of barley are effective for thesuppression of some weeds in sweet maize.
