{"title":"Investigation Corn and Soybean Intercropping Advantages in Competition with Redroot Pigweed and Jimsonweed","authors":"M. Rezvani, F. Zaefarian, M. Aghaalikhani, H. Rahimian Mashhadi, E. Zand","volume":57,"journal":"International Journal of Agricultural and Biosystems Engineering","pagesStart":529,"pagesEnd":532,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/7151","abstract":"
The spatial variation in plant species associated with intercropping is intended to reduce resource competition between species and increase yield potential. A field experiment was carried out on corn (Zea mays L.) and soybean (Glycine max L.) intercropping in a replacement series experiment with weed contamination consist of: weed free, infestation of redroot pigweed, infestation of jimsonweed and simultaneous infestation of redroot pigweed and jimsonweed in Karaj, Iran during 2007 growing season. The experimental design was a randomized complete block in factorial experiment with replicated thrice. Significant (P≤0.05) differences were observed in yield in intercropping. Corn yield was higher in intercropping, but soybean yield was significantly reduced by corn when intercropped. However, total productivity and land use efficiency were high under the intercropping system even in contamination of either species of weeds. Aggressivity of corn relative to soybean revealed the greater competitive ability of corn than soybean. Land equivalent ratio (LER) more than 1 in all treatments attributed to intercropping advantages and was highest in 50: 50 (corn\/soybean) in weed free. These findings suggest that intercropping corn and soybean increase total productivity per unit area and improve land use efficiency. Considering the experimental findings, corn-soybean intercropping (50:50) may be recommended for yield advantage, more efficient utilization of resources, and weed suppression as a biological control.<\/p>\r\n","references":"[1] O. H Hauggaard-Nielsen, MK. Andersen, B. J\u251c\u00a9rnsgaard, and E. S.\r\nJensen, Density and relative frequency effects on competitive\r\ninteractions and resource use in pea-barley intercrops. Field Crops Re.\r\n2006, 95, 256-267.\r\n[2] L. Marchiol, F. Miceli, M. Pinosa, G. Zerbi, Intercropping of soybean\r\nand corn for silage in northern Italy. Effect of nitrogen level and plant\r\ndensity on growth, yield, and protein content. Eur. J. Agron. 1992, 1,\r\n207-211.\r\n[3] K. Carruthers, F. Cloutier, D. L. Smith, Intercropping corn with soybean,\r\nlupin and forages: weed control by intercrops combined with interrow\r\ncultivation. Eur. j. of Agron. 1998, 8, 225-238.\r\n[4] T. D. West, D. R. Griffith, Effect of strip intercropping corn and soybean\r\non yield and profit. J. Prod. Agric. 1992, 5, 107-110.\r\n[5] M. Ghaffarzadeh, F. G. Pre'chac, R. M. Cruse, Grain yield response of\r\ncorn, soybean, and oat grown in a strip intercropping system. Am. J.\r\nAltern. Agric. 1994, 9, 171-177.\r\n[6] P. K. Ghosh, A. K. Tripathi, K. K. Bandyopadhyay, M. C. Manna,\r\nAssessment of nutrient competition and nutrient requirement in\r\nsoybean\/sorghum intercropping system. Europ. J. Agronomy. 2009, 31,\r\n43-50.\r\n[7] J. M. Watiki, S. Fukai, J. A. Banda, B. A. Keating, Radiation\r\ninterception and growth of corn\/cow pea intercrop as affected by corn\r\nplant density and cowpea cultivar. Field crops Res. 1993, 35, 123-133.\r\n[8] G. Hayder, S. S. Mumtaz, A. Khan, S. Khan, Corn and soybean\r\nintercropping under various levels of soybean seed rates. Asian J. of\r\nPlant Sci. 2003, 2, 339-341.\r\n[9] L. Li, J. Sun, F. Zhang, X. Li, S. Yang, Z. Rengel, Wheat\/corn or\r\nwheat\/soybean strip intercropping, I. Yield advantage and interspecific\r\ninteractions on nutrients. Field Crops Res. 2001, 71, 123-137.\r\n[10] R. W. Willey, Intercropping-its importance and research needs. Part 1.\r\nCompetition and yield advantages. Field Crop Abst. 1979, 32, 1-10.\r\n[11] M. Liebman, E. Dyck, Crop rotation and intercropping strategies for\r\nweed management. Ecol. Appl. 1993, 3, 92-122.\r\n[12] T. R. Yellamanda, G. H. Sankara Reddi, Principles of agronomy. Second\r\nedition. Kalyani Publishers, 1995.\r\n[13] M. Aasim, E. M. Umer, A. Karim Yield and Competition Indices of\r\nIntercropping Cotton (Gossypium hirsutum L.) Using Different Planting\r\nPatterns. Tarim Bilimleri dergisi. 2008, 14, 326-333.\r\n[14] A. Miyda, K. Bhattacharjee, S. S. Ghose, P. Banik, Deferred seeding of\r\nblackgram (Phaseolus mungo L.) and rice (Oryza sativa L.) field on\r\nyield advantages and mothering of weeds. J. Agron. Crop Sci. 2005,\r\n191, 195-201.\r\n[15] F. Ofori, W.R. Stern, Cereal-legume intercropping systems. Adv. Agron.\r\n1987, 41, 41-90.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 57, 2011"}