Bado, V. and Sawadogo, A. and Thio, B. and Bationo, A. and Traoré, K. and Cescas, M. (2011) Nematode infestation and N-effect of legumes on soil and crop yields in legume-sorghum rotations. Agricultural Sciences, 2 (2). pp. 49-55.
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Abstract
The effects of cowpea (Vignaunguiculata) and groundnut (Arachis hypogea) on succeeding sorghum yields, soil mineral N and nematode in- festation were studied during five cropping sea- sons (2000 to 2004) in a weakly acid Ultisol of the agronomy research station of Farakô-Balo- cated in the Guinean zone of Burkina Faso, West Africa. A factorial 5 x 5 design of five crop rota- tions with five fertilizer treatments in a split-plot arrangement with four replications was used. Sorghum yields were affected by the two factors (rotation with legumes and fertilizer applications) during the four years. But interactions were not observed between the two factors. Monocrop- ping of sorghum produced the lowest yields and legume-sorghum rotations increased sorghum yields by 50% to 300%. Groundnut-sorghum and cowpea-sorghum rotations increased soil mi- neral N by 36% and 52%, respectively. Crop ro- tation influenced nematode infestation but the effects on soil and sorghum root infestation dif-fered according to the rotation. The cowpeasor- ghum rotation increased soil and sorghum root infestationby nematodes while groundnut-sor- ghum decreesed the nematode population. The soil of the cowpea-sorghum rotation contained 1.5 to 2 times more nematodes than the soil of the monocropping of sorghum. In contrast, the soil of the groundnut-sorghum rotation con-tained from 17 to 19 times fewer nematodes than that of themonocropping of sorghum. However, nematode infestation did not affect any of the succeeding sorghum yields. It was concluded that the parasitic effect of nematodes was lim-ited by the predominance of positive N-effects on the development of succeeding sorghum.
| Item Type: | Article |
|---|---|
| Author Affiliation: | Africa Rice Center (AfricaRice), Sahel Regional Station , Saint Louis, Senegal |
| Subjects: | Plant Protection > Control Methods |
| Divisions: | Sorghum |
| Depositing User: | David T |
| Date Deposited: | 15 Jul 2011 03:09 |
| Last Modified: | 15 Jul 2011 03:09 |
| Official URL: | http://dx.doi.org/10.4236/as.2011.22008 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/2354 |
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