Maize-soybean intercropping system: effects on Striga control, grain yields and economic productivity at Tarka, Benue State, Nigeria
Treść / Zawartość
On-Farm trials were conducted from July to November during the 2009 and 2010 cropping seasons, at Tarka, Benue State, Nigeria to evaluate the effects of intercropping maize and soybean on striga control, grain yields and economic productivity. The treatments consisted of sole maize, sole soybean and the intercrop of maize and soybean, replicated three times in a randomized complete block design. The results obtained showed that intercropping maize and soybean significantly (P ≤ 0.05) reduced striga shoot count by 55.9 % and 56.1 % respectively, in 2009 and 2010 compared to that produced on pure maize plots. Number of affected maize plants, lodging score of maize and infestation rate were lower for intercropping than for sole maize plots. The severity level was also recorded lower for intercropping compared to that recorded for pure maize stands, where severity level is in the range of high to very high. Though, soybean yield was reduced by intercropping, however, soybean and maize intercropping system increased maize grain yield, total intercrop yield, land equivalent coefficient greater than 0.25, land equivalent ratio values greater than one (LER > 1), higher total intercrop values and monetary equivalent ratio greater than 1.00, indicating yield and economic advantages. The implication of study showed that intercropping maize and soybean can be adopted by farmers as an efficient cropping system strategy to reduce striga infestation, increase maize yield and give greater economic productivity.
-  Abbasher A.A., Hess D.E., Sauerborn J., African Crop Science Journal 6 (1998) 179-188.
-  Adetiloye P.O. (1988). A review of current competition indices and models for formulating component proportions in intercropping in cassava based cropping systems research II, pp. 72-90.
-  Adetiloye P.O., Ezedinma F.O.C., Okigbo B.N., Ecology modeling 19 (1983) 27-39.
-  Berner D.K., Kling J.G., Singh, B.B., Plant Disease 79 (1995) 652-660.
-  Carson A.G., Tropical Pest Management 34 (1988) 349-358.
-  Dembele B., Kayentao M. (2002). Integrated striga management technologies: From research to farmers. Proceedings of the 4th general workshop of the Pan African Control Network (PASCON), 28 Oct. - 1 Nov., 1996, Mali.
-  Dugje I.Y., Omoigui L.O., Ekeleme F., Bandyopadhyay R., Kumar P.L. , Kamara A.Y. (2009). Farmers guide to soybean production in Northern Nigeria, pp. 16.
-  Enwezor W.O.E., Udo J., Ajotade K.A. (1989). Fertilizer procurement and distribution. Fertilizer use and management practice for crops in Nigeria. Savenda Publishers, Nsukka, Nigeria. Pp. 25-28.
-  Gressel J., Hanafi A., Head G., Marasas W., Obilana A.B., Ochanda J., Souissi T., Tzotzos G., Crop Protection, 23(2004) 661-689.
-  Ijoyah M.O., Jimba J., Journal of Biodiversity and Environmental Science 2(2) (2012) 38-44.
-  International Institute of Tropical Agriculture (2002). Community workshop on striga and imperata management: Tarka local Government, Benue State, Nigeria, 18-21 March, 2002.
-  Lagoke S.T.O., Shebayon J.A.Y., Weber G., Olufajo O.O., Elemo K.A., Adu J.K., Emechebe A.M., Singh B.B., Adeoti A.A. (1994). Survey of striga problem and evaluation of striga control methods and packages in crops in the Nigerian savanna. In: Improving striga management in Africa. Proceedings, 2nd General Workshop of PASCON, 23-29 June, 1991, Nairobi, Kenya.
-  Mashark S.A., Denwar N.N., Haruna M., Journal of Agronomy 5(4) (2006) 617-620.
-  Oswald A., Crop Protection 24(4) (2005) 333-342.
-  Parker C., Crop Protection 10 (1991) 6-22.
-  Scholes D.J., Press C.M., Plant Biology 11(2) (2008) 180-186.
-  Steel R.G.D., Torrie J.H. (1980). Principles and procedures of statistics. A Biometrical Approach. 2nd edition, McGraw Hill, New York, pp. 633.
-  Willey R.W. (1985). Expl. Agric. 21 (1985) 119-133.