Evaluation of yield and yield components in additive intercropping of grain sorghum )Sorghum bicolor L.( and cowpea )Vigna unguiculata L.) under complete and limited irrigation conditions

Document Type : Scientific - Research


1 Department of Agronomy and Plant Breeding, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran

2 Faculty of Agricultural and Animal Sciences, University of Tehran, Tehran, Iran

3 Department of Agronomy, Faculty of Agriculture, Damghan Branch, Islamic Damghan University, Damghan, Iran


To evaluate the yield and yield components in additive intercropping system of grain sorghum (Sorghum bicolor L.) and cowpea (Vigna unguiculata L.) under limited irrigation condition, an experiment was conducted in Research Farm of College of Agriculture, University of Tehran, during spring 2006. The experimental treatments were arranged in split plots based on a complete randomized block design with four replications. The limited irrigation (moisture stress) treatments of IR1: normal weekly irrigation (control), IR2: moderate moisture stress during vegetative and generative growth, IR3: moderate moisture stress during vegetative and severe during generative growth, IR4:severe moisture stress during vegetative and moderate during generative growth, were allocated to the main plots and different combinations of sorghum and cowpea in additive intercropping systems of S1: sole sorghum (weed free), S2, S3 and S4 additive series of 15, 30 and 45% of the sole cowpea seed rate mixed with full sorghum seed rate, respectively and S5: sole sorghum (weeded), were allocated to sub plots. The results of the experiment showed that there was a significant effect of limited irrigation systems, additive intercropping systems and their interaction on yield and yield components of sorghum and cowpea. The highest grain yield of sorghum was obtained in normal weekly irrigation treatment (control) which was followed by IR2 irrigation system. The same result was obtained in weed free sorghum treatment which was followed by additive mixture of sorghum+45% cowpea. Additive mixture of sorghum+45% cowpea was the most stable production system at different limited irrigation systems. The highest total sorghum yield (equivalent yield) was obtained in IR1-S4 treatment which was followed by IR2-S4. Based on the results of this experiment the additive mixed cropping of sorghum+ 45% sole seed rate cowpea at moderate limited irrigation (IR2) could be recommended for yield advantages, higher income, and more efficient utilization of resources in arid and semi arid areas of Iran.


1- Alizadeh, A. 2001. Drought and necessity of increase in water productivity. Quarterly Science-Extension of Aridity and Agricultural Drought 2: 3-8.
2- Agegnehu, G., Ghizaw, A., and Sinebo, W. 2006. Yield performance and land use efficiency of barley and faba bean mixed cropping in Ethiopian highlands. European Journal of Agronomy 25: 202-207.
3- Akyeampong, E. 1996. Some responses of cowpea to drought stress. Congress: potentials of drilling vegetable in farming systems of sub sahara African workshop. pp: 141-159.
4- Banik, P., Midya, A., Sarkar, B.K., and Ghose, S.S. 2006. Wheat and chickpea intercropping systems in an additive series experiment: Advantages and Weed smothering. European Journal of Agronomy 24: 325-332.
5- Gbehounou, G., and Adango, E. 2002. Trap crops of Striga hermonthica: in vitro identification and effectiveness in situ. Crop Protection 22: 395 – 404.
6- James, R. F., Carl, R.C., and Philip, J.B. 2001. Drought-stress effects on branch and main stem seed yield and yield components of determinate soybean. Crop Science 41: 797-763.
7- Krasova-Wade, T., Diouf, O., Ndoye, I., Elimane sal, C., Braconnier, S., and Neyra, M. 2006. Water condition effects on rhizobia competition for cowpea nodule occupancy. African Journal of Biotechnology 5: 1457-1463.
8- Lud low, M.M., Santamaria, J.M., and Fukai, S. 1990. Contribution of osmotic adjustment of grain yield in sorghum (sorghum bicolor) under water limited conditions. II. Water stress after anthesis. Australian Journal of Agricultural Research 41: 67-78.
9- Maman, N., Mason, S.C., Lyon, D.J., and Dhungana, P. 2004. Yield components of pearl millet and grain sorghum across environments in the Central Great Plains. Crop Science 44: 2138-2145
10- Mary, J.G., Jeffrey, C.S., Katherine, O.B., and Edward, S. 2001. Relative sensitivity of spring wheat grain yield and quality parameters to moisture deficit. Crop Science 41: 327-335.
11- Mazaheri, D. 1998. Intercropping. Second edition. Tehran University Press. 262 pp. (In Persian)
12- Narashima Rao, C.L., and Shivraj, A. 1998. Effect of water stress on grain growth of glossy and non glossy varieties of grain sorghum. Indian Journal of Agricultural Science 58: 770 – 773.
13- Nassiri Mahllati, M., Koocheki, A., Rezvani Moghadam, P., and Beheshti, A. 2001. (Translation). Agroecology. Ferdowsi University Press. Pp: 15. (In Persian)
14- Nielson, Hauggaard, H., Jornsgaard, B., and Steen, J.E. 2003. Legume-Cereal intercropping system as a weed management tool. In: Proceeding of the 4th Europe. Weed Research Society, Workshop: Crop Weed Competition Interaction. Universita Tusca, Viterbro, Italy, 10-12th April.
15- Ntare, B.R., Williams, J.H., and Bationo, A. 1993. Physiological determinants of cowpea seed yield affected by phosphorus fertilizer and sowing dates intercrop with millet. Field Crops Research 53: 151-158.
16- Oswald, A., Ransom, J.K., Kroscel, J., and Sauerborn, J. 2002. Intercropping control Striga in maize based farming system. Crop Protection 21: 367-374.
17- Red Fearn, D., Bextun, D.R., and Devin, T.E. 1999. Sorghum intercropping effects on yield, morphology and quality of forage soybean. Crops Science Society of America 39: 1380-1384.
18- Rezende, G.D., and Ramalho, M.A. 1994. Competitive ability of maize and common bean cultivars intercropped in different environments. Journal of Agriculture Science 123: 185-190.
19- Sweeney, D.W., and Lamm, F.R. 1993. Timing of limited and N-injection for grain sorghum. Irrigation Science 14: 35-39.
20- Tesfamicheal, N., and Reddy, M.S. 1996. Maize/bean intercropping effects on component yield, land use efficiency and net-returns at Awassa and Melkassa. Proceedings of the 1st Conference of the Agronomy and Crop Physiology Society of Ethiopia. Addisababa, Ethiopia, pp. 51-55.
21- Tsubo, M., Mukhala. E., Ogindo, H., Walker, S. 2005. Productivity of maize-bean intercropping in a semi-arid region of South Africa. Water Search 29: 381-388.
22- Vandermeer, J. 1989. The Ecology of intercropping Department of Biology university of Michigan. U.S.A. University Press Cambridge.
23- Yang, J., Zhang, J., Wang, Z., Zhu, Q., and Liu, L. 2001. Water deficit induced senescence and its relationship to the remobilization of pre-stored carbon in wheat during grain filling. Agronomy Journal 93: 196-206.