Abstract
To study the effects of rapeseed residues on weeds growth and the following corn yield, this experiment was conducted in 2009 at Hamedan Agriculture Research Center, Iran. The experiment design was split plot in the form of a randomized complete block design with three replications. Treatments of the experiment were hand weeding (with and without) and rapeseed residues (0, 15 and 30 kg/plot). Results indicated that hand weeding significantly affected all the measured traits of corn, but residue had only significant effect on plant height, ear diameter and 1000 kernels weight. Residue had also significant effect on weeds growth; the highest residue rate (30 kg/plot) was more effective and gave the highest weed control. Keywords: Allelopathy, Brassica napus, Residue, Weed, Zea mays
Highlights
During the past decades, increased application of incorporating rapeseed residues to soil suppresses weed germination (Fenwick et al, effect of these materials on environment and products 1983)
Herbicides has increased the number and distribution of Moyer & Huang (1997) reported that rapeseed aqueous herbicide resistant weeds (Shanahan et al, 2003; extract reduced wheat germination compared with the Anonymous, 2010; Monaco et al, 2002)
Results showed that rapeseed residues significantly affected the total weeds biomass and the density of Amaranthus retroflexus and Rumex spp (Table 3)
Summary
During the past decades, increased application of incorporating rapeseed residues to soil (as cover crop or chemical herbicides has caused concerns about the mulch) suppresses weed germination (Fenwick et al, effect of these materials on environment and products 1983). In addition to being an important oil crop, weeds density was counted using a 1.5m 1.5m is an allelopathic compounds containing plant This crop quadrate, weeds were harvested, oven dried and their dry has a valuable defense system called Myrosinase- weight was measured.
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