Document Type : Research Paper
Authors
1
Ph.D Student of Crops Ecology, Department of Agronomy, Faculty of Crop Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan.
2
2. Associated Professor, Department of Agronomy Faculty of Crop Production, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan.
3
Professor, Department of Agrotechnology, Ferdowsi University of Mashhad.
4
Professor, Department of Agronomy, Faculty of Crop Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan.
5
Assistant Professor, Faculty of Agriculture, Shahrekord University
10.22034/saps.2025.62231.3240
Abstract
Background and Objective: This research has been conducted with the aim of investigating the effect of different cover crops in controlling weeds and yield of soybeans.
Materials and Methods: Experiment was carried out as a split plot based on randomized complete block design with three replications. Treatments were seven types of cover crops including Arugula, Indian mustard, Hairy vetch, Berseem clover, Rye, Barley and no cover crop in weedy and weed free conditions.
Results and Discussion: In the first year, weedy treatment caused a 42% decrease in soybean yield. In the second year, the highest yield of soybeans was obtained in Berseem clover residue and weed free treatment (3279 kg.ha-1). Yield of soybean in Arugula and Indian mustard residues was similar in weedy and weed free conditions; despite the ability of Arugula and Indian mustard residues to control of weeds, it seems that the low yield of soybeans in these treatments is related to the alleopatic effect of these plants residues on soybeans. Yield of soybean in barley, rye, berseem clover and Hairy vetch residues in weedy treatment compared to weed free treatment, decreased by 13, 23, 57 and 58%, respectively.
Conclusion: The results of this research showed that the use of Berseem clover and Hairy vetch residues with weeding in soybean cultivation is recommended. Also, the use of rye and barley residues are suggested if it is not possible to use complementary methods in weed control.
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