• M. Rusdy




The objectives of this experiment were to determine dry matter yield and competitiveness of alang-alang (Imperata cylindrica) and guinea grass (Panicum maximum) in intercropping. The experiment was arranged in factorial combinations of four planting proportions, two levels of nitrogen fertilization and three harvesting intervals with three replications. Planting proportions were 0, 33.3, 66.7, and 100% of alang-alang (planting densities of 0, 1, 2 and 3 plants/pot) combined with 100, 66.7, 33.3,  and 0% of guinea grass (planting densities of 3, 2, 1 and 0 plants/pot).  The plants fertilized with nitrogen fertilizer at the doses of 0 and 250 kg/ha and harvested at intervals of 30, 45 and 90 days. Results of experiment showed that as planting proportion of alang-alang increased in the mixtures, total dry matter yield of mixed plants decreased.  N fertilization increased dry matter yield in both species, but guinea grass was more responsive than alang-alang. Regardless of planting proportion and nitrogen fertilization, increasing harvest interval decreased dry matter yield of guinea grass – alang-alang mixture. Intercropping system gave substantially higher yield advantage over sole cropping in terms of land equivalent ratio with the maximum value achieved when guinea grass – alang-alang mixture planted at the ratio of 2 : 1, fertilized with N and harvest monthly. In intercropping system, guinea grass appeared to be the dominant crop as indicated by its higher values of relative crowding coefficient and positive sign of aggressivity index.  It reflects that guinea grass grown in association with alang-alang utilized the resources more aggressively than when alang-alang grown alone.


Download data is not yet available.


Anonymous. 1990. The Land Resources in Indonesia: A National Overview. Land Resources Department, Natural Resources Inst., Overseas Development Administration, Foreign and Commonwealth Office, London, UK and Direktorat Bina Program, Direktorat Jenderal Penyiapan Pemukiman, DepartemenTransmigrasi, Jakarta, Indonesia.

Anonymous. 2013. Alang-alang (Imperata cylindrica) hay. Feedipedia, Animal Feed Resource Inormation. http://www.feedipedia.org/node/11138. [Accessed on February 15, 2013].

Cliff, B. 2013. Blady grass. http://infomedfarmers.com/bladygrass. [Accessed on February 14, 2013].

Falvey, J. L. 1981. Imperata cylindrica and animal production. Tropical Grassland., 15(1): 52 – 56.

Friday, A. S., M. E. Drilling and D. P. Gamty. 1999. Imperata Grassland Rehabilitation Using Agroforestry and Associated Natural Regeneration. International Centre for Research in Agroforestry. Southeast Asian Regional Research Programs, Bogor Indonesia.

Humphreys, L. R. 1981. Environmental Adaptation of Tropical Pasture Plants. MacMillan Publishers, Ltd.

Khybri, M. L. and D. D. Mishra. 1967. Root studies on some selected grasses in eastern Nepal. Indian Forester., 6: 400 – 406.

Mackdicken, K. G., K. Hairiah, A. Otsamo, B. Duguma and N. M. Majid. 1997. Shade based control of Imperata cylindrica: tree fallow and cover crops. Agroforestry Systems., 36 : 131 – 149.

McGilchrist, C. A. 1965. Analysis of competition experiment. Biometrics., 21: 975 – 985.

Murniati. 2013. Conversion of Imperata cylindrica grassland into agroforestry system through the application of Mycorrhiza and shading by trees. http://www.tropenbos. [Accessed on February 15, 2013].

Nasrullah, M. Niimi., R. Akashi and O. Kawamura. 2003. Nutrititive evaluation of forage plants grown in South Sulawesi Indonesia. Asian Aust. J. Anim. Sci., 16(5): 693 – 701.

Omoko, M. and L. C. Hammond. 2010. Biological and water use efficiencies of sorghum– groundnut intercrop. Cameroon J. Exp. Biol., 6(1): 1 – 10.

Rezvany, M., F. Zaefarian, M. Aghaalikhani, H. R. Mashhadi and E. Zand. 2011. Investigation on corn and soybean intercropping in competition with Redroot pigweed and Jimsonweed. World Academy of Science, Engineering and Technology., 57: 350 – 352.

Rusdy, M. 2010. Dry matter production, carbohydrate reserve content and nitrogen utilization in some tropical grasses as influenced by nitrogen fertilization and age of plants. Jurnal Ilmu dan Teknologi Peternakan, 1(1): 28 – 34.

Sajise, P. E. 1973. Evaluation of cogon (Imperata cylindrica (L.) Beauv.) as seral stage in Philippine vegetational successions. 1: The cogonal seral and plant succession. Dissertation Abstr. Int. B., Cornell University, Itacha, New York.

Willey, R. W. 1979. Intercropping – its importance and research needs. Part – 1. Competition and yield advantages. Agron. J., 71: 115 – 119.